XCM517BA01DR_技术文档

XCM517Series

ETR2425-007

600mA Synchronous Dual Output Step-Down DC/DC Converters

■GENERAL DESCRIPTION

The XCM517 series is a multi combination module IC which comprises of two 600mA driver transistor built-in synchronous

step–down DC/DC converter. The XCM517 series is available in an ultra small package USP-12B01 suited for space

conscious applications.

The XCM517 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42ΩP-channel driver

transistor and 0.52ΩN-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs enable a high

efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected

externally. Operating voltage range is from 2.7V to 6.0V. With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected

for suiting to your particular application. As for operation mode, the XCM517xA / XCM517xB series are PWM control, the

XCM517xC / XCM517xD series are automatic PWM/PFM switching control, allowing fast response, low ripple and high

efficiency over the full range of loads (from light load to heavy load).

The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce

current consumption to as low as 1.0μA or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal

P-channel driver transistor is forced OFF when input voltage becomes 1.4V or lower.

■FEATURES

■APPLICATIONS

●Mobile phones, Smart phones

●Bluetooth equipment

P-ch Driver Transistor Built-In

: ON resistance 0.42Ω

N-ch Driver Transistor Built-In : ON resistance 0.52Ω

Input Voltage Range

High Efficiency

: 2.7V ~ 6.0V

: 92% (TYP.)

: 600mA

●Personal Device Assistances

●Portable games

Output Current

●Digital still cameras, camcorders

Oscillation Frequency

Maximum Duty Cycle

Soft-Start Circuit Built-In

: 1.2MHz, 3.0MHz (+15%)

: 100%

Current Limiter Circuit Built-In (Constant Current & Latching)

Ceramic Capacitor Compatible

Control Methods

: PWM (XCM517xA / XCM517xB)

■TYPICAL APPLICATION CIRCUIT

PWM/PFM Auto (XCM517xC / XCM517xD)

*Performance depends on external components and wiring on the PCB.

Combination of voltage

XCM517xx01D

XCM517xx02D

XCM517xx03D

XCM517xx06D

XCM517xx07D

1 ch

1.2V

1.8V

1.5V

2ch

1.8V

3.3V

1.8V

3.3V

*The other combination of voltage is semi-custom.

* The dotted lines in the circuit indicates the connection using through-holes at the

backside of the PC board

VOUT1

AGND1

EN1

Lx1

Lx

1

2

3

4

5

6

12

11

VOUT

AGND

XC9235/XC9236

PGND1

VIN1

PGND

10

9

VIN

CE

EN2

VIN2

CE

VIN

XC9235/XC9236

AGND2

PGND2

Lx2

8

VOUT2

VOUT

7

Lx

(TOP VIEW)

1/28

XCM517 Series

■PIN CONFIGURATIOIN

1 VOUT1

LX112

*1

PGND1 11

2 AGND1

VIN1 10

EN2 9

3 EN1

4 VIN2

5 PGND2

6 Lx2

AGND2 8

VOUT2 7

*2

USP-12B01

(BOTTOM VIEW)

■PIN ASSIGNMENT

PIN NUMBER

PIN NAME

FUNCTIONS

USP-12B01

XCM517

V_OUT1

XC9235/XC9236

DC/DC-1 Channel Block:

Output Voltage sense

DC/DC-1 Channel Block:

Analog Ground

1

V_OUT

―

2

3

AGND1

EN1

AGND

CE

―

DC/DC-1 Channel Block:

ON/OFF Control

DC/DC-2 Channel Block:

Power Input

4

V_IN2

V_IN

DC/DC-2 Channel Block :

Power Ground

5

PGND2

Lx2

―

PGND

Lx

DC/DC-2 Channel Block :

Switching

6

―

DC/DC-2 Channel Block :

Output Voltage sense

DC/DC-2 Channel Block :

Analog Ground

7

V_OUT2

AGND2

EN2

―

V_OUT

AGND

CE

8

―

DC/DC-2 Channel Block :

ON/OFF Control

9

―

DC/DC-1 Channel Block :

Power Input

10

11

12

V_IN1

V_IN

PGND

Lx

―

DC/DC-1 Channel Block :

Power Ground

PGND1

Lx1

―

DC/DC-1 Channel Block :

Switching

―

NOTE:

* A dissipation pad on the reverse side of the package should be electrically isolated.

*1: Electrical potential of the DC/DC 1 channels’ dissipation pad should be V_SSlevel.

*2: Electrical potential of the DC/DC 2 channels’ dissipation pad should be V_SSlevel.

Care must be taken for an electrical potential of each dissipation pad so as to enhance mounting strength and heat release when the pad

needs to be connected to the circuit.

2/28

XCM517

Series

■PRODUCT CLASSIFICATION

●Ordering Information

XCM517①②③④⑤⑥

DESIGNATOR

DESCRIPTION

SYMBOL

-

DESCRIPTION

Control, Oscillation

①②

: See the chart below

Frequency and Options

: Internally set sequential number relating to output voltage

(See the chart below)

③④

Output Voltage

-

⑤

⑥

Package

D

R

: USP-12B01

Device Orientation

: Embossed tape, standard feed

DESIGNATOR ①②

OCSILLATION

HIGH SPEED

①②

CONTROL

CL DISCHARGE

EN INPUT LOGIC

FREQUENCY

1.2M

SOFT-START

Not Available

Available

AA

AB

AC

AD

BA

BB

BC

BD

PWM Control

Not Available

Available

High Active

3.0M

PWM/PFM Auto

PWM Control

1.2M

3.0M

1.2M

PWM Control

3.0M

Available

PWM/PFM Auto

1.2M

Available

3.0M

Available

DESIGNATOR ③④

Output Voltage

V_OUT2

③④

V_OUT1

1.2

01

1.8

3.3

1.8

3.3

02

1.2

03

1.8

06

1.5

07

1.5

*This series are semi-custom products. For other combinations, output voltages and etc., please ask Torex sales contacts.

3/28

XCM517 Series

■BLOCK DIAGRAMS

XC9235A / XC9236A Series

XC9235B / XC9236B Series

XC9235A/XC9236A

XC9235B/XC9236B

Available with CL Discharge, High Speed Soft-Start

(CL放電機能有、高速ソフトスタート）

Phase

Compensation

Phase

Compensation

Current Feedback

Current Limit

V_OUT

R2

R1

Error Amp.

PWM

Error Amp.

PWM

Comparator

Synch

Buffer

Drive

Buffer

Drive

Logic

Lx

R1

VSHORT

V_IN

Vref with

Soft Start,

CE

Vref with

Soft Start,

CE

PWM/PFM

Selector

PWM/PFM

Selector

CE/

Ramp Wave

Generator

OSC

Ramp Wave

Generator

OSC

UVLO Cmp

UVLO

V_SS

R3

R4

V_SS

R3

R4

CE/MODE

Control

Logic

CE/MODE

Control

Logic

CE

NOTE: The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "L" level inside,

and XC9235 series chooses only PWM control.

The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "H" level inside,

and XC9236 series chooses only PWM/PFM automatic switching control.

Diodes inside the circuit are ESD protection diodes and parasitic diodes.

*Diodes inside the circuit are an ESD protection diode and a parasitic diode.

■MAXIMUM ABSOLUTE RATINGS

PARAMETER

V_IN1/ V_IN2Voltage

L_x1/ L_x2Voltage

SYMBOL

V_IN1/ V_IN2

VL_x1/ VL_x2

V_OUT1/ V_OUT2

V_EN1/ V_EN2

ILx₁/ ILx₂

Pd

RATINGS

UNITS

V

- 0.3 ～ 6.5

- 0.3 ～ V_IN1+ 0.3 or 6.5

- 0.3 ～ 6.5

±1500

V

V_OUT1/ V_OUT2Voltage

EN1 / EN2 Voltage

L_x1/ L_x2Current

V

mA

mW

℃

Power Dissipation (Ta=25℃)

USP-12B01

150

Junction Temperature

Operating Temperature Range

Storage Temperature Range

Tj

125

Topr

- 40 ～ + 85

- 55 ～ + 125

℃

Tstg

℃

4/28

XCM517

Series

■ELECTRICAL CHARACTERISTICS

●XCM517Ax, 1ch Block /2ch Block

V_OUT=1.8V, f_OSC=1.2MHz, Ta=25℃

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX. UNITS CIRCUIT

When connected to external components,

V_IN=V_EN=5.0V, I_OUT1=30mA

Output Voltage

V_OUT

V_IN

1.764

2.7

1.800 1.836

V

①

Operating Voltage Range

Maximum Output Current

-

6.0

-

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=1.0V ^(*8)

I_OUTMAX

600

mA

V

_EN=V_IN,V_OUT=0V,

UVLO Voltage

Supply Current

V_UVLO

I_DD

I_STB

f_OSC

1.00

1.40

1.78

V

③

②

Voltage which Lx pin holding “L” level ^{(*1, *10)}

(XCM517AA)

(XCM517AC)

-

22

15

0

50

33

V_IN=V_EN=5.0V, V_OUT=V_OUT(E)×1.1V

μA

Stand-by Current

V_IN=5.0V, V_EN=0V, V_OUT=V_OUT(E)×1.1V

1.0

μA

②

①

When connected to external components,

V_IN=V_OUT(E)+2.0V,V_EN=1.0V, I_OUT=100mA

Oscillation Frequency

1020

120

1200

160

1380

200

kHz

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=V_IN, I_OUT=1mA ^(*11)

V_EN=V_IN=(C-1) I_OUT=1mA ^(*11)

PFM Switching Current

I_PFM

mA

①

Maximum I_PFMLimit

Maximum Duty Ratio

Minimum Duty Ratio

MAX I_PFM

MAXDTY

MINDTY

200

%

①

②

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×0.9V

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×1.1V

When connected to external components,

100

-

0

Efficiency ^(*2)

EFFI

R_L

-

92

-

%

①

V

_EN=V_IN＝V_{OUT (E)}+1.2V ^(*7), I_OUT=100mA

Lx SW "H" ON Resistance 1

Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1

Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current ^(*5)

Lx SW "L" Leak Current ^(*5)

Current Limit ^(*9)

V_IN=V_EN=5.0V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=3.6V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.01

1050

0.55

0.67

0.66

0.77

1.0

Ω

④

-

H

ｘ

R_L

ｘ

R_L

ｘ

Ω

L

V_IN=V_EN=3.6V, ^(*4)

Ω

-

ILeakH

ILeakL

ILIM

V_IN=V_OUT=5.0V, V_EN=0V, L_X=0V

V_IN=V_OUT=5.0V, V_EN=0V, L_X=5.0V

V_IN=V_EN=5.0V, V_OUT=V_{OUT (E)}×0.9V ^(*7)

μA

mA

⑤

⑥

1.0

900

1350

Output Voltage

Temperature

Characteristics

△

V_OUT

I_OUT=30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/ ℃

①

V

_OUT・△topr

V

_OUT=0V, Applied voltage to V_EN,

Voltage changes Lx to “H” level ^(*10)

_OUT=0V, Applied voltage to V_EN,

EN "H" Level Voltage

EN "L" Level Voltage

V_ENH

V_ENL

0.65

V_SS

-

6.0

V

③

V

0.25

(*10)

Voltage changes Lx to “L” level

EN "H" Current

EN "L" Current

I_ENH

I_ENL

V_IN=V_EN=5.0V, V_OUT=0V

- 0.1

0.

μA

⑤

V_IN=5.0V, V_EN=0V, V_OUT=0V

-

0.1

When connected to external components,

V_EN=0V → V_IN, I_OUT=1mA

Soft Start Time

Latch Time

t_SS

0.5

1.0

2.5

ms

①

⑦

V_IN= V_EN=5.0V, V_OUT=0.8× V_OUT(E)

Short Lx at 1Ω resistance

,

t_LAT

-

20.0

(*6)

Sweeping V_OUT, V_IN=V_EN= 5.0V, Short Lx at

1Ω resistance, V_OUTvoltage which Lx becomes “L”

level within 1ms

Short Protection

Threshold Voltage

V_SHORT

0.675

0.900

1.125

V

⑦

Test conditions: Unless otherwise stated, V_IN= 5.0V, V_{OUT (E)}= Setting voltage

NOTE:

*1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (V_IN- Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6: Time until it short-circuits DC_OUTwith GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: When V_OUT(E)+1.2V<2.7V, V_IN=2.7V

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V_IN～V_IN- 1.2V, "L"＝+ 0.1V ～ - 0.1V

*11: XCM517xA / XCM517xB series exclude I_PFMand MAXI_PFMbecause those are only for the PFM control’s functions.

*12: The electrical characteristics shows 1 channel values when the other channel is stopped.

5/28

XCM517 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM517Ax, 1ch Block / 2ch Block

V_OUT=1.8V, f_OSC=3.0MHz, Ta=25℃

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX. UNITS CIRCUIT

When connected to external components,

V_IN=V_EN=5.0V, I_OUT1=30mA

Output Voltage

V_OUT

V_IN

1.764

2.7

1.800 1.836

V

①

Operating Voltage Range

Maximum Output Current

-

6.0

-

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=1.0V ^(*8)

I_OUTMAX

600

mA

V

_EN=V_IN,V_OUT=0V,

UVLO Voltage

Supply Current

V_UVLO

I_DD

I_STB

f_OSC

1.00

1.40

1.78

V

③

②

Voltage which Lx pin holding “L” level ^{(*1, *10)}

(XCM517AB)

(XCM517AD)

-

46

21

0

65

35

V_IN=V_EN=5.0V, V_OUT=V_OUT(E)×1.1V

μA

Stand-by Current

V_IN=5.0V, V_EN=0V, V_OUT=V_OUT(E)×1.1V

1.0

μA

②

①

When connected to external components,

V_IN=V_OUT(E)+2.0V,V_EN=1.0V, I_OUT=100mA

Oscillation Frequency

2550

170

3000

220

3450

270

kHz

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=V_IN, I_OUT=1mA ^(*11)

V_EN=V_IN=(C-1) I_OUT=1mA ^(*11)

PFM Switching Current

I_PFM

mA

①

Maximum I_PFMLimit

Maximum Duty Ratio

Minimum Duty Ratio

MAX I_PFM

MAXDTY

MINDTY

200

300

%

①

②

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×0.9V

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×1.1V

When connected to external components,

100

-

0

Efficiency ^(*2)

EFFI

R_L

-

86

-

%

①

V

_EN=V_IN＝V_{OUT (E)}+1.2V ^(*7), I_OUT=100mA

Lx SW "H" ON Resistance 1

Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1

Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current ^(*5)

Lx SW "L" Leak Current ^(*5)

Current Limit ^(*9)

V_IN=V_EN=5.0V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=3.6V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.01

1050

0.55

0.67

0.66

0.77

1.0

Ω

④

-

H

ｘ

R_L

ｘ

R_L

ｘ

Ω

L

V_IN=V_EN=3.6V, ^(*4)

Ω

-

ILeakH

ILeakL

ILIM

V_IN=V_OUT=5.0V, V_EN=0V, L_X=0V

V_IN=V_OUT=5.0V, V_EN=0V, L_X=5.0V

V_IN=V_EN=5.0V, V_OUT=V_{OUT (E)}×0.9V ^(*7)

μA

mA

⑤

⑥

1.0

900

1350

Output Voltage

Temperature

Characteristics

△

V_OUT

I_OUT=30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/ ℃

①

V

_OUT・△topr

V

_OUT=0V, Applied voltage to V_EN,

Voltage changes Lx to “H” level ^(*10)

_OUT=0V, Applied voltage to V_EN,

EN "H" Level Voltage

EN "L" Level Voltage

V_ENH

V_ENL

0.65

V_SS

-

6.0

V

③

V

0.25

(*10)

Voltage changes Lx to “L” level

EN "H" Current

EN "L" Current

I_ENH

I_ENL

V_IN=V_EN=5.0V, V_OUT=0V

- 0.1

0.

μA

⑤

V_IN=5.0V, V_EN=0V, V_OUT=0V

-

0.1

When connected to external components,

V_EN=0V → V_IN, I_OUT=1mA

Soft Start Time

Latch Time

t_SS

0.5

1.0

2.5

ms

①

⑦

V_IN= V_EN=5.0V, V_OUT=0.8× V_OUT(E)

Short Lx at 1Ω resistance

,

t_LAT

-

20.0

(*6)

Sweeping V_OUT, V_IN=V_EN= 5.0V, Short Lx at

1Ω resistance, V_OUTvoltage which Lx becomes “L”

level within 1ms

Short Protection

Threshold Voltage

V_SHORT

0.675

0.900

1.125

V

⑦

Test conditions: Unless otherwise stated, V_IN= 5.0V, V_{OUT (E)}= Setting voltage

NOTE:

*1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (V_IN- Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6: Time until it short-circuits DC_OUTwith GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: When V_OUT(E)+1.2V<2.7V, V_IN=2.7V

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V_IN～V_IN- 1.2V, "L"＝+ 0.1V ～ - 0.1V

*11: XCM517xA / XCM517xB series exclude I_PFMand MAXI_PFMbecause those are only for the PFM control’s functions.

*12: The electrical characteristics shows 1 channel values when the other channel is stopped.

6/28

XCM517

Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM517Bx, 1ch Block / 2ch Block

V_OUT=1.8V, f_OSC=1.2MHz, Ta=25℃

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX. UNITS CIRCUIT

When connected to external components,

V_IN=V_EN=5.0V, I_OUT1=30mA

Output Voltage

V_OUT

V_IN

1.764

2.7

1.800 1.836

V

①

Operating Voltage Range

Maximum Output Current

-

6.0

-

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=1.0V ^(*8)

I_OUTMAX

600

mA

V

_EN=V_IN,V_OUT=0V,

UVLO Voltage

Supply Current

V_UVLO

I_DD

I_STB

f_OSC

1.00

1.40

1.78

V

②

③

Voltage which Lx pin holding “L” level ^{(*1, *10)}

(XCM517BA)

(XCM517BC)

-

22

15

0

50

33

V_IN=V_EN=5.0V, V_OUT=V_OUT(E)×1.1V

μA

Stand-by Current

V_IN=5.0V, V_EN=0V, V_OUT=V_OUT(E)×1.1V

1.0

μA

③

①

When connected to external components,

V_IN=V_OUT(E)+2.0V,V_EN=1.0V, I_OUT=100mA

Oscillation Frequency

1020

120

1200

160

1380

200

kHz

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=V_IN, I_OUT=1mA ^(*11)

V_EN=V_IN=(C-1) I_OUT=1mA ^(*11)

PFM Switching Current

I_PFM

mA

①

Maximum I_PFMLimit

Maximum Duty Ratio

Minimum Duty Ratio

MAX I_PFM

MAXDTY

MINDTY

200

%

①

②

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×0.9V

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×1.1V

When connected to external components,

100

-

0

Efficiency ^(*2)

EFFI

R_L

-

92

-

%

①

V

_EN=V_IN＝V_{OUT (E)}+1.2V ^(*7), I_OUT=100mA

Lx SW "H" ON Resistance 1

Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1

Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current ^(*5)

Current Limit ^(*9)

V_IN=V_EN=5.0V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=3.6V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.01

1050

0.55

0.67

0.66

0.77

1.0

Ω

④

-

⑨

⑥

H

ｘ

R_L

ｘ

R_L

ｘ

Ω

L

V_IN=V_EN=3.6V, ^(*4)

Ω

ILeakH

ILIM

V_IN=V_OUT=5.0V, V_EN=0V, L_X=0V

V_IN=V_EN=5.0V, V_OUT=V_{OUT (E)}×0.9V ^(*7)

μA

mA

900

1350

Output Voltage

Temperature

Characteristics

△

V_OUT

I_OUT=30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/ ℃

①

V

_OUT・△topr

V

_OUT=0V, Applied voltage to V_EN,

Voltage changes Lx to “H” level ^(*10)

_OUT=0V, Applied voltage to V_EN,

EN "H" Level Voltage

EN "L" Level Voltage

V_ENH

V_ENL

0.65

V_SS

-

6.0

V

③

V

0.25

(*10)

Voltage changes Lx to “L” level

V_IN=V_EN=5.0V, V_OUT=0V

EN "H" Current

EN "L" Current

I_ENH

I_ENL

- 0.1

0.

μA

⑤

V_IN=5.0V, V_EN=0V, V_OUT=0V

-

0.1

When connected to external components,

V_EN=0V → V_IN, I_OUT=1mA

Soft Start Time

Latch Time

t_SS

-

0.25

0.4

ms

①

⑦

V_IN= V_EN=5.0V, V_OUT=0.8× V_OUT(E)

Short Lx at 1Ω resistance

,

t_LAT

1.0

-

20.0

(*6)

Sweeping V_OUT, V_IN=V_EN= 5.0V, Short Lx at

1Ω resistance, V_OUTvoltage which Lx becomes “L”

level within 1ms

Short Protection

Threshold Voltage

V_SHORT

0.675

200

0.900

300

1.125

450

V

⑦

⑧

ＣＬDischarge

Rdischg

V_IN= 5.0V L_X= 5.0V V_EN= 0V V_OUT= open

Ω

Test conditions: Unless otherwise stated, V_IN= 5.0V, V_{OUT (E)}= Setting voltage

NOTE:

*1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (V_IN- Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6: Time until it short-circuits DC_OUTwith GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: When V_OUT(E)+1.2V<2.7V, V_IN=2.7V

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V_IN～V_IN- 1.2V, "L"＝+ 0.1V ～ - 0.1V

*11: XCM517xA / XCM517xB series exclude I_PFMand MAXI_PFMbecause those are only for the PFM control’s functions.

*12: The electrical characteristics shows 1 channel values when the other channel is stopped.

7/28

XCM517 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM517Bx, 1ch Block /2ch Block

V_OUT=1.8V, f_OSC=3.0MHz, Ta=25℃

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX. UNITS CIRCUIT

When connected to external components,

V_IN=V_EN=5.0V, I_OUT1=30mA

Output Voltage

V_OUT

V_IN

1.764

2.7

1.800 1.836

V

①

Operating Voltage Range

Maximum Output Current

-

6.0

-

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=1.0V ^(*8)

I_OUTMAX

600

mA

V

_EN=V_IN,V_OUT=0V,

UVLO Voltage

Supply Current

V_UVLO

I_DD

I_STB

f_OSC

1.00

1.40

1.78

V

②

③

Voltage which Lx pin holding “L” level ^{(*1, *10)}

(XCM517BB)

(XCM517BD)

-

46

21

0

65

35

V_IN=V_EN=5.0V, V_OUT=V_OUT(E)×1.1V

μA

Stand-by Current

V_IN=5.0V, V_EN=0V, V_OUT=V_OUT(E)×1.1V

1.0

μA

③

①

When connected to external components,

V_IN=V_OUT(E)+2.0V,V_EN=1.0V, I_OUT=100mA

Oscillation Frequency

2550

170

3000

220

3450

270

kHz

When connected to external components,

V_IN=V_OUT(E)+2.0V, V_EN=V_IN, I_OUT=1mA ^(*11)

V_EN=V_IN=(C-1) I_OUT=1mA ^(*11)

PFM Switching Current

I_PFM

mA

①

Maximum I_PFMLimit

Maximum Duty Ratio

Minimum Duty Ratio

MAX I_PFM

MAXDTY

MINDTY

-

100

-

200

300

%

①

②

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×0.9V

V_IN=V_EN5.0V, V_OUT=V_{OUT (E)}×1.1V

When connected to external components,

-

0

Efficiency ^(*2)

EFFI

R_L

-

92

-

%

①

V

_EN=V_IN＝V_{OUT (E)}+1.2V ^(*7), I_OUT=100mA

Lx SW "H" ON Resistance 1

Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1

Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current ^(*5)

Current Limit ^(*9)

V_IN=V_EN=5.0V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=3.6V, V_OUT=0V,IL_X=100mA ^(*3)

V_IN=V_EN=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.01

1050

0.55

0.67

0.66

0.77

1.0

Ω

④

-

⑨

⑥

H

ｘ

R_L

ｘ

R_L

ｘ

Ω

L

V_IN=V_EN=3.6V, ^(*4)

Ω

ILeakH

ILIM

V_IN=V_OUT=5.0V, V_EN=0V, L_X=0V

V_IN=V_EN=5.0V, V_OUT=V_{OUT (E)}×0.9V ^(*7)

μA

mA

900

1350

Output Voltage

Temperature

Characteristics

△

V_OUT

I_OUT=30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/ ℃

①

V

_OUT・△topr

V

_OUT=0V, Applied voltage to V_EN,

Voltage changes Lx to “H” level ^(*10)

_OUT=0V, Applied voltage to V_EN,

EN "H" Level Voltage

EN "L" Level Voltage

V_ENH

V_ENL

0.65

V_SS

-

6.0

V

③

V

0.25

(*10)

Voltage changes Lx to “L” level

V_IN=V_EN=5.0V, V_OUT=0V

EN "H" Current

EN "L" Current

I_ENH

I_ENL

- 0.1

0.

μA

⑤

V_IN=5.0V, V_EN=0V, V_OUT=0V

-

0.1

When connected to external components,

V_EN=0V → V_IN, I_OUT=1mA

Soft Start Time

Latch Time

t_SS

-

0.32

0.5

ms

①

⑦

V_IN= V_EN=5.0V, V_OUT=0.8× V_OUT(E)

Short Lx at 1Ω resistance

,

t_LAT

1.0

-

20.0

(*6)

Sweeping V_OUT, V_IN=V_EN= 5.0V, Short Lx at

1Ω resistance, V_OUTvoltage which Lx becomes “L”

level within 1ms

Short Protection

Threshold Voltage

V_SHORT

0.675

200

0.900

300

1.125

450

V

⑦

⑧

ＣＬDischarge

Rdischg

V_IN= 5.0V L_X= 5.0V V_EN= 0V V_OUT= open

Ω

Test conditions: Unless otherwise stated, V_IN= 5.0V, V_{OUT (E)}= Setting voltage

NOTE:

*1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (V_IN- Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6: Time until it short-circuits DC_OUTwith GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: When VOUT(E)+1.2V<2.7V, VIN=2.7V

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V_IN～V_IN- 1.2V, "L"＝+ 0.1V ～ - 0.1V

*11: XCM517xA / XCM517xB series exclude I_PFMand MAXI_PFMbecause those are only for the PFM control’s functions.

*12: The electrical characteristics shows 1 channel values when the other channel is stopped.

8/28

XCM517

Series

■ELECTRICAL CHARACTERISTICS (Continued)

●PFM Switching Current (I_PFM) by Oscillation Frequency and Setting Voltage

(mA)

1.2MHz

3.0MHz

TYP.

260

SETTING VOLTAGE

MIN.

140

130

120

TYP.

180

170

160

MAX.

240

MIN.

190

180

170

MAX.

350

V_OUT(E)≦1.2V

1.2V＜V_OUT(E)≦1.75V

1.8V≦V_OUT(E)

220

240

300

200

220

270

●Input Voltage (V_IN) for Measuring Maximum PFM Switching Current (MAXI_PFM) Limit

f_OSC

1.2MHz

3.0MHz

(C-1)

V _OUT(E)+0.5V

V _OUT(E)+1.0V

Minimum operating voltage is 2.7V.

ex.) Although when V _OUT(E)= 1.2V, f_OSC= 1.2MHz, (C-1) = 1.7V, the (C-1) becomes 2.7V because of the minimum operating voltage 2.7V.

●Soft-start time by each setting voltage（XCM517Bx series only）

PRODUCT SERIES

f_OSC

SETTING VOLTAGE

0.8≦V _OUT(E)<1.5

1.5≦V _OUT(E)<1.8

1.8≦V _OUT(E)<2.5

2.5≦V _OUT(E)≦4.0

0.8≦V _OUT(E)<2.5

2.5≦V _OUT(E)≦4.0

0.8≦V _OUT(E)<1.8

1.8≦V _OUT(E)≦4.0

MIN.

TYP.

250

320

250

320

250

320

250

320

MAX.

1200kHz

3000kHz

-

400μs

500μs

400μs

500μs

400μs

500μs

400μs

500μs

XC517BA

XC517BC

XC517BB

XC517BD

9/28

XCM517 Series

■ TYPICAL APPLICATION CIRCUIT

●

f_OSC=3.0MHz

L1/L2: 1.5μH (NR3015 TAIYO YUDEN)

CIN1/CIN2: 4.7μF (Ceramic)

CL1/CL2 10μF (Ceramic)

● f_OSC=1.2MHz

L1/L2:

4.7μH (NR4018 TAIYO YUDEN)

: 10μF (Ceramic)

CIN1/CIN2: 4.7μF (Ceramic)

CL1/CL2

:

10/28

XCM517

Series

■OPERATIONAL DESCRIPTION

The XCM517 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase

compensation circuit, output voltage adjustment resistors, P-channel MOSFET driver transistor, N-channel MOSFET switching

transistor for the synchronous switch, current limiter circuit, UVLO circuit and others. (See the block diagram above.) The

series ICs compare, using the error amplifier, the voltage of the internal voltage reference source with the feedback voltage

from the VOUT pin through split resistors, R1 and R2. Phase compensation is performed on the resulting error amplifier output,

to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM comparator

compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and

delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is

continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-channel MOS driver

transistor current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback

signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is used ensuring

stable output voltage.

The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.

The ramp wave circuit determines switching frequency. The frequency is fixed internally and can be selected from 1.2MHz or

3.0MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM operation, and to

synchronize all the internal circuits.

The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback

voltage divided by the internal split resistors, R1 and R2. When a voltage lower than the reference voltage is fed back, the

output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier output are fixed

internally to deliver an optimized signal to the mixer.

The current limiter circuit of the XCM517 series monitors the current flowing through the P-channel MOS driver transistor

connected to the Lx pin, and features a combination of the current limit mode and the operation suspension mode.

① When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx

pin at any given timing.

② When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state.

③ At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over

current state.

④ When the over current state is eliminated, the IC resumes its normal operation.

The IC waits for the over current state to end by repeating the steps ① through ③. If an over current state continues for a

few ms and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the

driver transistor, and goes into operation suspension mode. Once the IC is in suspension mode, operations can be

resumed by either turning the IC off via the EN pin, or by restoring power to the V_INpin. The suspension mode does not

mean a complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry remains in

operation. The current limit of the XCM517 series can be set at 1050mA at typical. Depending on the state of the PC

Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise, the board

should be laid out so that input capacitors are placed as close to the IC as possible.

V_EN

11/28

XCM517 Series

■OPERATIONAL DESCRIPTION (Continued)

<Short-Circuit Protection>

The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the V_OUTpin (refer to FB point in

the block diagram shown in the previous page). In case where output is accidentally shorted to the Ground and when

the FB point voltage decreases less than half of the reference voltage (Vref) and a current more than the I_LIMflows to

the driver transistor, the short-circuit protection quickly operates to turn off and to latch the driver transistor. In latch

mode, the operation can be resumed by either turning the IC off and on via the EN pin, or by restoring power supply to

the V_INpin.

When sharp load transient happens, a voltage drop at the V_OUTis propagated to the FB point through C_FB, as a result,

short circuit protection may operate in the voltage higher than 1/2 V_OUTvoltage.

< UVLO Circuit>

When the VIN pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent false

pulse output caused by unstable operation of the internal circuitry. When the V_INpin voltage becomes 1.8V or higher,

switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output

startup operation. The soft start function operates even when the VIN pin voltage falls momentarily below the UVLO

operating voltage. The UVLO circuit does not cause a complete shutdown of the IC, but causes pulse output to be

suspended; therefore, the internal circuitry remains in operation.

In PFM control operation, until coil current reaches to a specified level (IPFM), the IC keeps the P-ch MOSFET on. In this

case, time that the P-ch MOSFET is kept on (t_ON) can be given by the following formula.

t

_ON= L×IPFM / (VIN－VOUT)

→IPFM①

In PFM control operation, the maximum duty ratio (MAXI_PFM) is set to 200% (TYP.). Therefore, under the condition that

the duty increases (e.g. the condition that the step-down ratio is small), it’s possible for P-ch MOSFET to be turned off even

when coil current doesn’t reach to IPFM.

→IPFM②

IPFM②

IPFM①

t_ON

Ton

FOSC

Maxumum IPFMCurrent

Lx

IPFM

0mA

IPFM

0mA

I Lx

12/28

XCM517

Series

■OPERATIONAL DESCRIPTION (Continued)

＜C_LHigh Speed Discharge＞

The XCM517Bx series can quickly discharge the electric charge at the output capacitor (C_L) when a low signal to the EN

pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the L_Xpin

and the V_SSpin. When the IC is disabled, electric charge at the output capacitor (C_L) is quickly discharged so that it may

avoid application malfunction. Discharge time of the output capacitor (C_L) is set by the C_Lauto-discharge resistance (R)

and the output capacitor (C_L). By setting time constant of a C_Lauto-discharge resistance value [R] and an output capacitor

value (C_L) as τ(τ=C x R), discharge time of the output voltage after discharge via the N channel transistor is calculated

by the following formulas.

V = V_OUT(E)x e ^–t/^τ, or t=τln (V_OUT(E)/ V)

V : Output voltage after discharge

V_OUT(E): Output voltage

t: Discharge time,

τ: C x R

C= Capacitance of Output capacitor (C_L)

R= C_Lauto-discharge resistance

Output Voltage Dischage Characteristics

Rdischg = 300Ω（TYP）

100

90

80

70

60

50

40

30

20

10

CL=10uF

CL=20uF

CL=50uF

0

10

20

30

40

50

60

70

80

90 100

Discharge Time t (ms)

13/28

XCM517 Series

■OPERATIONAL DESCRIPTION (Continued)

The operation of the XCM517 series will enter into the shut down mode when a low level signal is input to the EN pin. During the

shutdown mode, the current consumption of the IC becomes 0μA (TYP.), with a state of high impedance at the Lx pin and VOUT

pin. The IC starts its operation by inputting a high level signal to the EN pin. The input to the EN pin is a CMOS input and the

sink current is 0μA (TYP.).

●XCM517 series - Examples of how to use EN pin

(A)

SW＿EN

ON

STATUS

Stand-by

Operation

SW_EN

EN

OFF

(B)

SW_EN

SW＿EN

ON

STATUS

Operation

Stand-by

OFF

(B)

(A)

＜Soft Start＞

Soft start time is available in two options via product selection.

The XCM517Ax series provide 1.0ms (TYP). The XCM517Bx series provide 0.25ms (TYP). Soft start time is defined as the time to reach 90%

of the output setting voltage when the V_ENpin is turned on.

VENH

90% of setting voltage

14/28

XCM517

Series

■FUNCTION CHART

EN

OPERATIONAL STATES

VOLTAGE LEVEL

XCM517xA/XCM517xB XCM517xC/XCM517xD

Synchronous

H Level ^(*1)

L Level ^(*2)

PWM/PFM

PWM Fixed Control

Automatic Switching

Stand-by

Note on EN pin voltage level range

(*1) H level: 0.65V < H level < V_IN

(*2) L level: 0V < L level < 0.25V

■NOTE ON USE

1. The XCM517 series is designed for use with ceramic output capacitors. If, however, the potential difference is too large

between the input voltage and the output voltage, a ceramic capacitor may fail to absorb the resulting high switching energy

and oscillation could occur on the output. If the input-output potential difference is large, connect an electrolytic capacitor in

parallel to compensate for insufficient capacitance.

2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by

external component selection, such as the coil inductance, capacitance values, and board layout of external components.

Once the design has been completed, verification with actual components should be done.

3. Depending on the input-output voltage differential, or load current, some pulses may be skipped, and the ripple voltage may

increase.

4. When the difference between VIN and VOUT is large in PWM control, very narrow pulses will be outputted, and there is the

possibility that some cycles may be skipped completely.

5. When the difference between VIN and VOUT is small, and the load current is heavy, very wide pulses will be outputted and

there is the possibility that some cycles may be skipped completely.

6. With the IC, the peak current of the coil is controlled by the current limit circuit. Since the peak current increases when

dropout voltage or load current is high, current limit starts operation, and this can lead to instability. When peak current

becomes high, please adjust the coil inductance value and fully check the circuit operation. In addition, please calculate the

peak current according to the following formula:

Ipk = (VIN - VOUT) x OnDuty / (2 x L x f_OSC) + IOUT

L: Coil Inductance Value

f

_OSC: Oscillation Frequency

7. When the peak current which exceeds limit current flows within the specified time, the built-in P-ch driver transistor turns off.

During the time until it detects limit current and before the built-in transistor can be turned off, the current for limit current flows;

therefore, care must be taken when selecting the rating for the external components such as a coil.

8. Care must be taken when laying out the PC Board, in order to prevent misoperation of the current limit mode. Depending on

the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise,

the board should be laid out so that input capacitors are placed as close to the IC as possible.

9. Use of the IC at voltages below the recommended voltage range may lead to instability.

15/28

XCM517 Series

■NOTE ON USE (Continued)

10. This IC should be used within the stated absolute maximum ratings in order to prevent damage to the device.

11. When the IC is used in high temperature, output voltage may increase up to input voltage level at no load because of the leak

current of the driver transistor.

12. The current limit is set to 1350mA (MAX.) at typical. However, the current of 1350mA or more may flow. In case that the

current limit functions while the VOUT pin is shorted to the GND pin, when P-ch MOSFET is ON, the potential difference for

input voltage will occur at both ends of a coil. For this, the time rate of coil current becomes large. By contrast, when

N-ch MOSFET is ON, there is almost no potential difference at both ends of the coil since the VOUT pin is shorted to the

GND pin. Consequently, the time rate of coil current becomes quite small. According to the repetition of this operation,

and the delay time of the circuit, coil current will be converged on a certain current value, exceeding the amount of current,

which is supposed to be limited originally. Even in this case, however, after the over current state continues for several ms,

the circuit will be latched. A coil should be used within the stated absolute maximum rating in order to prevent damage to

the device.

①Current flows into P-ch MOSFET to reach the current limit (ILIM).

②The current of ILIM or more flows since the delay time of the circuit occurs during from the detection of the current limit to

OFF of P-ch MOSFET.

③Because of no potential difference at both ends of the coil, the time rate of coil current becomes quite small.

④Lx oscillates very narrow pulses by the current limit for several ms.

⑤The circuit is latched, stopping its operation.

# ms

13. In order to stabilize V_INvoltage level and oscillation frequency, we recommend that a by-pass capacitor (CIN) be connected

as close as possible to the VIN and VSS pins.

14. High step-down ratio and very light load may lead an intermittent oscillation.

15. During PWM / PFM automatic switching mode, operating may become unstable at transition to continuous mode.

Please verify with actual parts.

External Components

16/28

XCM517

Series

■NOTE ON USE (Continued)

16. Please note the inductance value of the coil. The IC may enter unstable operation if the combination of ambient

temperature, setting voltage, oscillation frequency, and L value are not adequate.

In the operation range close to the maximum duty cycle, The IC may happen to enter unstable output voltage operation even

if using the L values listed below.

●The Range of L Value

f_OSC

V_OUT

L Value

3.0MHz

0.8V＜V_OUT<4.0V

1.0μH～2.2μH

3.3μH～6.8μH

4.7μH～6.8μH

V

_OUT≦2.5V

1.2MHz

2.5V＜V_OUT

*When a coil less value of 4.7 μ H is used at

f_OSC=1.2MHz or when a coil less value of 1.5μH is

used at f_OSC=3.0MHz, peak coil current more easily

reach the current limit ILMI. In this case, it may

happen that the IC can not provide 600mA output

current.

17. It may happen to enter unstable operation when the IC operation mode goes into continuous operation mode under the

condition of small input-output voltage difference. Care must be taken with the actual design unit.

●Instructions of pattern layouts

1. In order to stabilize VIN voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to

the VIN & VSS pins.

2. Please mount each external component as close to the IC as possible.

3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit

impedance.

4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground

currents at the time of switching may result in instability of the IC.

5. This series’ internal driver transistors bring on heat because of the output current and ON resistance of driver transistors.

17/28

XCM517 Series

■TEST CIRCUITS

18/28

XCM517

Series

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Efficiency vs. Output Current

V_OUT=1.8V,1.2MHz

V_OUT=1.8V,3.0MHz

L=4.7μH(NR4018), C_IN=4.7μF, C_L=10μF

L=1.5μH(NR3015), C_IN=4.7μF, C_L=10μF

PWM/PFM Automatic Sw itching Control

100

90

80

70

60

50

40

30

20

10

0

100

90

80

70

60

50

40

30

20

10

0

VIN= 4.2V

3.6V

VIN= 4.2V

3.6V

PWM Control

VIN= 4.2V

PWM Control

VIN= 4.2V

3.6V

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current:IOUT(mA)

(2) Output Voltage vs. Output Current

_OUT=1.8V,1.2MHz

V

V_OUT=1.8V,3.0MHz

L=4.7μH(NR4018), C_IN=4.7μF, C_L=10μF

L=1.5μH(NR3015), C_IN=4.7μF, C_L=10μF

2.1

2.0

1.9

1.8

1.7

1.6

1.5

2.1

2.0

1.9

1.8

1.7

1.6

1.5

PWM/PFM Automatic Sw itching Control

VIN 4.2V,3.6V

PWM/PFM Automatic Sw itching Control

＝

VIN 4.2V,3.6V

＝

PWM Control

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current:IOUT(mA)

(3) Ripple Voltage vs. Output Current

V_OUT=1.8V,1.2MHz

V_OUT=1.8V,3.0MHz

L=4.7μH(NR4018), C_IN=4.7μF, C_L=10μF

L=1.5μH(NR3015), C_IN=4.7μF, C_L=10μF

100

80

60

40

20

0

100

80

60

40

20

0

PWM/PFM Automatic

Sw itching Control

PWM Control

VIN 4.2V,3.6V

＝

PWM/PFM Automatic

Sw itching Control

VIN 4.2V

PWM Control

VIN 4.2V,3.6V

＝

VIN 4.2V

＝

3.6V

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current:IOUT(mA)

19/28

XCM517 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) Oscillation Frequency vs. Ambient Temperature

V_OUT=1.8V,1.2MHz

V_OUT=1.8V,3.0MHz

L=4.7μH(NR4018), C_IN=4.7μF, C_L=10μF

L=1.5μH(NR3015), C_IN=4.7μF, C_L=10μF

1.5

1.4

1.3

1.2

1.1

1.0

0.9

0.8

3.5

3.4

3.3

3.2

3.1

3.0

2.9

2.8

2.7

2.6

2.5

VIN=3.6V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

(5) Supply Current vs. Ambient Temperature

V_OUT=1.8V,1.2MHz

V_OUT=1.8V,3.0MHz

40

35

40

VIN=6.0V

35

30

25

20

15

10

5

VIN=4.0V

30

VIN=6.0V

25

VIN=4.0V

20

15

10

5

0

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

℃

Ambient Temperature: Ta (

)

℃

(6) Output Voltage vs. Ambient Temperature

_OUT=1.8V,3.0MHz

(7) UVLO Voltage vs. Ambient Temperature

V_OUT=1.8V,3.0MHz

V

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.8

EN=VIN

CE=VIN

1.5

1.2

0.9

0.6

0.3

0.0

VIN=3.6V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

20/28

XCM517

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(8) CE "H" Voltage vs. Ambient Temperature

(9) CE "L" Voltage vs. Ambient Temperature

V_OUT=1.8V,3.0MHz

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

VIN=5.0V

VIN=3.6V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

(10) Soft Start Time vs. Ambient Temperature

V_OUT=1.8V,3.0MHz

L=4.7μH(NR4018), CIN=4.7μF, CL=10μF

L=1.5μH(NR3015), CIN=4.7μF, CL=10μF

5

4

3

2

1

0

5

4

3

2

1

0

VIN=3.6V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

℃

Ambient Temperature: Ta (

)

℃

(11) "Pch / Nch" Driver on Resistance vs. Input Voltage

_OUT=1.8V,3.0MHz

V

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

Nch on Resistance

Pch on Resistance

0

1

2

3

4

5

6

Input Voltage : VIN (V)

21/28

XCM517 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(12) XCM517BxSeries Rise Wave Form

V_OUT=1.2V,1.2MHz

V_OUT=3.3V,3.0MHz

L=4.7μH (NR4018), CIN=4.7μF, CL=10μF

L=1.5μH (NR3015), CIN=4.7μF, CL=10μF

VIN=5.0V

IOUT=1.0mA

VOUT：1.0V/div

VOUT：0.5V/div

EN：0.0V⇒1.0V

100μs/div

EN：0.0V⇒1.0V

100μs/div

(13) XCM517BxSeries Soft-Start Time vs. Ambient Temperature

_OUT=1.2V,1.2MHz

V

V_OUT=3.3V,3.0MHz

L=4.7μH(NR4018), CIN=4.7μF, CL=10μF

L=1.5μH(NR3015), CIN=4.7μF, CL=10μF

500

400

300

200

100

0

500

400

300

200

100

0

VIN=5.0V

IOUT=1.0mA

VIN=5.0V

IOUT=1.0mA

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta(℃)

(14) XCM517BxSeries CL Discharge Resistance vs. Ambient Temperature

V_OUT=3.3V,3.0MHz

600

VIN=6.0V

VIN=4.0V

500

400

300

200

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

℃

22/28

XCM517

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response

V_OUT=1.2V, 1.2MHz (PWM/PFM Automatic Switching Control)

L=4.7μH(NR4018), C_IN=4.7μF(ceramic), C_L=10μF(ceramic), Topr=25℃

V_IN=3.6V, EN=V_IN

I_OUT=1mA → 100mA

I_OUT=1mA → 300mA

1ch : I_OUT

2ch

V_OUT: 50mV/div

50μs/div

I_OUT=100mA → 1mA

I_OUT=300mA → 1mA

1ch : I_OUT

2ch

V

_OUT: 50mV/div

V_OUT: 50mV/div

200μs/div

23/28

XCM517 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V_OUT=1.2V, 1.2MHz (PWM Control)

L=4.7μH(NR4018), C_IN=4.7μF(ceramic), C_L=10μF(ceramic), Topr=25℃

V_IN=3.6V, EN=V_IN

I_OUT=1mA → 100mA

I_OUT=1mA → 300mA

1ch: I_OUT

2ch

_OUT: 50mV/div

2ch

V

V_OUT: 50mV/div

50μs/div

I_OUT=100mA → 1mA

I_OUT=300mA → 1mA

1ch: I_OUT

2ch

V_OUT: 50mV/div

200μs/div

24/28

XCM517

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V_OUT=1.8V, 3.0MHz (PWM/PFM Automatic Switching Control)

L=1.5μH(NR3015), C_IN=4.7μF(ceramic), C_L=10μF(ceramic),Topr=25℃

V_IN=3.6V, EN=V_IN

I_OUT=1mA → 100mA

I_OUT=1mA → 300mA

1ch : I_OUT

2ch

_OUT: 50mV/div

2ch

V

V_OUT: 50mV/div

50μs/div

I_OUT=100mA → 1mA

I_OUT=300mA → 1mA

1ch : I_OUT

2ch

V_OUT: 50mV/div

200μs/div

25/28

XCM517 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V_OUT=1.8V, 3.0MHz (PWM Control)

L=1.5μH(NR3015), C_IN=4.7μF(ceramic), C_L=10μF(ceramic), Topr=25℃

V_IN=3.6V, EN=V_IN

I_OUT=1mA → 100mA

I_OUT=1mA → 300mA

1ch : I_OUT

2ch

_OUT: 50mV/div

2ch

V

V_OUT: 50mV/div

50μs/div

I_OUT=100mA → 1mA

I_OUT=300mA → 1mA

1ch : I_OUT

2ch

V_OUT: 50mV/div

200μs/div

26/28

XCM517

Series

■PACKAGING INFORMATION

2 .8±0 .08

●USP-12B01

1234

5678

(0 .4 ) (0 .4 ) (0 .4 ) (0 .4 ) (0 .4 )

(0 .25 )

(0 .15 )

0.25±0 .05

0.2±0 .05

0.2±0.05

1 ^{0 .2±}2^{0 .05}3 ^0.2±4^{0 .05}5 ^0.2±6^{0 .05}

* Au plate thickness: Minimum 0.3 μm

■外部リード処理：Au m in0 .3um

*The side of pins is not plated, nickel is exposed.

※端子側面はニッケルで、Auめっきされておりま

*Pin #1 is wider than other pins.

せん。

※端子1は他端子に比べ太くなっています。

12 11 10 9 8 7

1 .2±0 .1

0 .7±0 .05 0 .7±0 .05

20/1 単位：mm

UNIT: mm

●USP-12B01 Reference Pattern Layout

●USP-12B01 Reference Metal Mask Design

1.30

0.95

0.55

0.25 0.25

1.30

0.95

0.55

1.35

0.90

0.65

0.250.25

1.35

0.90

0.65

0.35

0.45

0.15

0.40

0.15

0.20

0.50

0.20

27/28

XCM517 Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

prior permission of TOREX SEMICONDUCTOR LTD.

28/28


型号：	XCM517BA01DR
厂家：	Torex Semiconductor
描述：	600mA Synchronous Dual Output Step-Down DC/DC Converters 600mA同步双输出降压型DC / DC转换器转换器
文件：	总28页 (文件大小：770K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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