EN2360QI_技术文档

EN2360QI

6A Voltage Mode Synchronous Buck PWM

DC-DC Converter with Integrated Inductor

Description

Features

The EN2360QI is a Power System on a Chip

(PowerSoC) DC-DC converter. It integrates MOSFET

switches, small-signal control circuits, compensation

and an integrated inductor in an advanced 8x11x3mm

QFN module. It offers high efficiency, excellent line

and load regulation over temperature. The EN2360QI

operates over a wide input voltage range and is

specifically designed to meet the precise voltage and

fast transient requirements of high-performance

products. The EN2360QI features frequency

synchronization to an external clock, power OK

output voltage monitor, programmable soft-start along

with thermal and over current protection. The device’s

advanced circuit design, ultra high switching

frequency and proprietary integrated inductor

technology delivers high-quality, ultra compact, non-

isolated DC-DC conversion.

•

Integrated Inductor, MOSFETs, Controller

Wide Input Voltage Range: 4.5V – 14V

Total Solution Size Estimate: 185mm²

Frequency Synchronization (External Clock)

2% V_OUTAccuracy (Over Line/Load/Temperature)

Output Enable Pin and Power OK signal

Programmable Soft-Start Time

Can be Pin Compatible with the EN2340QI (4A)

Under Voltage Lockout Protection (UVLO)

Programmable Over Current Protection

Thermal Shutdown and Short Circuit Protection

RoHS Compliant, MSL Level 3, 260^oC Reflow

Applications

•

Space Constrained Applications

The Enpirion solution significantly helps in system

design and productivity by offering greatly simplified

Distributed Power Architectures

Output Voltage Ripple Sensitive Applications

Beat Frequency Sensitive Applications

board

design,

layout

and

manufacturing

requirements. In addition, overall system level

reliability is improved given the small number of

components required with the Enpirion solution.

Servers, Embedded Computing Systems,

LAN/SAN Adapter Cards, RAID Storage Systems,

Industrial Automation, Test and Measurement,

and Telecommunications

All Enpirion products are RoHS compliant and lead-

free manufacturing environment compatible.

Efficiency vs. Output Current

100

90

80

70

60

50

40

CONDITIONS

V_IN= 12.0V

AVIN = 3.3V

Dual Supply

VOUT = 3.3V

VOUT = 1.8V

VOUT = 1.2V

30

20

10

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

OUTPUT CURRENT (A)

Figure 1. Simplified Applications Circuit

Figure 2. Highest Efficiency in Smallest Solution Size

(Footprint Optimized)

www.enpirion.com

07514

September 17, 2012

Rev: A

EN2360QI

Ordering Information

Part Number

EN2360QI

EN2360QI-E

Package Markings

EN2360QI

Temp Rating (°C)

Package Description

68-pin (8mm x 11mm x 3mm) QFN T&R

QFN Evaluation Board

-40 to +85

EN2360QI

Packing and Marking Information: http://www.enpirion.com/resource-center-packing-and-marking-information.htm

Pin Assignments (Top View)

Figure 3: Pin Out Diagram (Top View)

NOTE A: NC pins are not to be electrically connected to each other or to any external signal, ground, or voltage.

However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage.

NOTE B: Shaded area highlights exposed metal below the package that is not to be mechanically or electrically

connected to the PCB. Refer to Figure 12 for details.

NOTE C: White ‘dot’ on top left is pin 1 indicator on top of the device package.

Pin Description

I/O Legend:

P=Power

G=Ground

NC=No Connect

I=Input O=Output

I/O=Input/Output

NAME I/O

FUNCTION

1-15,

25-26,

59, 64-

68

NO CONNECT – These pins may be internally connected. Do not connect them to each

NC other or to any other electrical signal. Failure to follow this guideline may result in device

damage.

NC

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

NAME I/O

FUNCTION

Regulated converter output. Connect these pins to the load and place output capacitor

between these pins and PGND pins 29-31.

16-24

VOUT

O

NO CONNECT – These pins are internally connected to the common switching node of the

NC(SW) NC internal MOSFETs. They are not to be electrically connected to any external signal, ground,

or voltage. Failure to follow this guideline may result in damage to the device.

27-28,

61-63

Input/Output power ground. Connect these pins to the ground electrode of the input and

29-34

35-41

PGND

PVIN

G

P

output filter capacitors. See VOUT and PVIN pin descriptions for more details.

Input power supply. Connect to input power supply. Decouple with input capacitor to

PGND pins 32-34.

Internal 3.3V linear regulator output. Connect this pin to AVIN (Pin 51) for applications

where operation from a single input voltage (PVIN) is required. If AVINO is being used,

place a 1µF, X5R, capacitor between AVINO and AGND as close as possible to AVINO.

42

AVINO

O

43

44

PG

BTMP

I/O Place a 47nF, X5R, capacitor between this pin and BTMP.

I/O See pin 43 description.

Internal regulated voltage used for the internal control circuitry. Place a 0.22µF, X5R,

capacitor between this pin and BGND.

See pin 45 description.

Digital Input. This pin accepts either an input clock to phase lock the internal switching

frequency or a S_OUT signal from another EN2360QI. Leave this pin floating if not used.

Digital Output. PWM signal is output on this pin. Leave this pin floating if not used.

Power OK is an open drain transistor (pulled up to AVIN or similar voltage) used for power

system state indication. POK is logic high when VOUT is within -10% of VOUT nominal.

Leave this pin floating if not used.

45

46

47

48

VDDB

BGND

S_IN

O

G

I

S_OUT

O

49

POK

O

Input Enable. Applying a logic high to this pin enables the output and initiates a soft-start.

Applying a logic Low disables the output. Do not leave floating.

3.3V Input power supply for the controller. Place a 0.1µF, X5R, capacitor between AVIN

and AGND.

Analog Ground. This is the ground return for the controller. All AGND pins need to be

connected to a quiet ground.

50

51

ENABLE

AVIN

I

P

G

52, 53

AGND

External Feedback Input. The feedback loop is closed through this pin. A voltage divider at

54

55

56

VFB

EAIN

SS

I/O VOUT is used to set the output voltage. The mid-point of the divider is connected to VFB. A

phase lead capacitor from this pin to VOUT is also required to stabilize the loop.

Optional Error Amplifier Input. Allows for customization of the control loop for performance

optimization. Leave this pin floating if not used.

O

Soft-start node. The soft-start capacitor is connected between this pin and AGND. The

I/O value of this capacitor determines the startup time. See Soft-Start Operation in the

Functional Description section for details.

Programmable over-current protection. Placement of a resistor on this pin will adjust the

over-current protection threshold. See Table 2 for the recommended RCLX Value to set

OCP at the nominal value specified in the Electrical Characteristics table. No current limit

protection when this pin is left floating.

57

58

RCLX

FADJ

I/O

Adding a resistor (R_FS) to this pin will adjust the switching frequency of the EN2360QI. See

I/O Table 1 for suggested resistor values on R_FSfor various PVIN/VOUT combinations to

maximize efficiency. Do not leave this pin floating.

60

69

CGND

PGND

Test pin. For Enpirion Internal Use Only. Connect to GND plane at all times.

Not a perimeter pin. Device thermal pad to be connected to the system GND plane for heat-

sinking purposes.

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

Absolute Maximum Ratings

CAUTION: Absolute Maximum ratings are stress ratings only. Functional operation beyond the recommended operating

conditions is not implied. Stress beyond the absolute maximum ratings may impair device life. Exposure to absolute

maximum rated conditions for extended periods may affect device reliability.

PARAMETER

Voltages on – PVIN, VOUT

SYMBOL

MIN

-0.5

MAX

15

UNITS

V_IN

V

Pin Voltages – AVINO, AVIN, ENABLE, POK, S_IN, S_OUT, M/S

Pin Voltages – VFB, SS, EAIN, RCLX, FADJ

PVIN Slew Rate

2.5

-0.5

0.3

6.0

2.75

3

V

V/ms

°C

V

Storage Temperature Range

T_STG

-65

150

260

2000

500

Maximum Operating Junction Temperature

Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020A

ESD Rating - all pins (based on Human Body Model)

ESD Rating (based on CDM)

T_{J-ABS Max}

V

Recommended Operating Conditions

PARAMETER

SYMBOL

MIN

MAX

UNITS

PVIN: Input Voltage Range

PVIN

4.5

2.5

0.6

14.0

V

AVIN: Controller Supply Voltage

Output Voltage Range (Note 1)

Output Current

AVIN

V_OUT

I_OUT

5.5

5.0

6.0

125

85

V

A

Operating Junction Temperature

Operating Ambient Temperature

T_J-OP

T_AMB

- 40

°C

Thermal Characteristics

PARAMETER

SYMBOL

TYP

UNITS

Thermal Resistance: Junction to Ambient (0 LFM) (Note 2)

16

°C/W

θ_JA

Thermal Resistance: Junction to Case (0 LFM)

Thermal Shutdown

2

°C/W

°C

θ_JC

T_SD

160

35

Thermal Shutdown Hysteresis

T_SDH

°C

Note 1: RCLX resistor value may need to be raised for V_OUT> V_IN– 2.5V to increase current limit threshold. Contact

techsupport@enpirion.com for details.

Note 2: Based on 2oz. external copper layers and proper thermal design in line with EIJ/JEDEC JESD51-7 standard for

high thermal conductivity boards.

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

Electrical Characteristics

NOTE: V_IN=12V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted.

Typical values are at T_A= 25°C.

PARAMETER

Operating Input Voltage

SYMBOL

PVIN

TEST CONDITIONS

MIN TYP MAX UNITS

4.5

14.0

V

Controller Input Voltage

AVIN

2.5

5.5

V

PVIN Under Voltage

Lock-out

Voltage above which UVLO is not

asserted

UVLO_PVIN

AVIN_UVLOR

2

V

AVIN Under Voltage

Lock-out rising

Voltage above which UVLO is not

asserted

2.3

AVIN Under Voltage

Lock-out falling

Voltage below which UVLO is

asserted

AVIN_OVLOF

I_AVIN

2.1

9

V

mA

V

AVIN Pin Input Current

Internal Linear Regulator

Output Voltage

AVINO

3.3

IPVIN_S

IAVIN_S

PVIN=12V, AVIN=3.3, ENABLE=0V

300

50

μA

Shut-Down Supply

Current

Feedback node voltage at:

V^IN= 12V, ILOAD = 0, TA = 25°C

Feedback Pin Voltage

V_FB

V

0.594

0.60

0.606

Feedback node voltage at:

4.5V ≤ V^IN≤ 14V

0A ≤ ILOAD ≤ 6A, T^A= -40 to 85°C

V

0.588

-5

0.612

5

VFB pin input leakage current

(Note 3)

Feedback pin Input

Leakage Current

I_FB

t_RISE

nA

C

_SS= 47nF

V_OUTRise Time

1.96

2.8

47

3.64

ms

nF

A

(Note 3, Note 4 and Note 5)

Soft Start Capacitor

Range

C_{SS_RANGE}

Maximum Continuous

Output Current

I_{OUT_CONT}

I_OCP

0

6

Over Current Trip Level

ENABLE Logic High

ENABLE Logic Low

ENABLE Lockout Time

Reference Table 2

9

A

V

V_{ENABLE_HIGH}4.5V ≤ V_IN≤ 14V;

V_{ENABLE_LOW}4.5V ≤ V_IN≤ 14V;

T_ENLOCKOUT

1.8

0

AV_IN

0.6

V

8

4

ms

ENABLE pin Input

Current

I_ENABLE

F_SW

180kΩ pull down (Note 3)

RFADJ =3kΩ

μA

Switching Frequency

1.0

MHz

External SYNC Clock

Frequency Lock Range

F_{PLL_LOCK}

Range of SYNC clock frequency

0.8

1.8

1.6

S_IN Threshold – Low

S_IN Threshold – High

V_{S_IN_LO}

V_{S_IN_HI}

S_IN Clock Logic Low Level (Note 3)

S_IN Clock Logic High Level (Note 3)

0.8

2.5

V

S_OUT Clock Logic Low Level

(Note 3)

S_OUT Threshold – Low

V_{S_OUT_LO}

V_{S_OUT_HI}

0.8

2.5

V

S_OUT Clock Logic High Level

(Note 3)

S_OUT Threshold –

High

1.8

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNITS

Percentage of Nominal Output

Voltage for POK to be Low

POK Lower Threshold

POK_LT

90

%

POK Output low Voltage

POK Output Hi Voltage

V_POKL

V_POKH

With 4mA Current Sink into POK

0.4

V

PVIN range: 4.5V ≤ V_IN≤ 14V

AVIN

POK pin V_OHleakage

current

I_POKL

V_T-LOW

V_T-HIGH

I_M/S

POK High (Note 3)

1

µA

V

M/S Pin Logic Low

M/S Pin Logic High

M/S Pin Input Current

Tie Pin to GND

0.8V

Pull up to AVIN Through an External

Resistor REXT

1.8V

V

100

VIN = 5.0V, REXT = 24.9kΩ

μA

Note 3: Parameter not production tested but is guaranteed by design.

Note 4: Rise time calculation begins when AVIN > V_UVLOand ENABLE = HIGH.

Note 5: V_OUTRise Time Accuracy does not include soft-start capacitor tolerance.

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Curves

Efficiency vs. Output Current

100

90

80

70

60

50

40

30

20

10

0

90

80

70

60

50

40

CONDITIONS

V_IN= 12.0V

AVIN = 3.3V

Dual Supply

CONDITIONS

V_IN= 10.0V

AVIN = 3.3V

Dual Supply

VOUT = 3.3V

VOUT = 1.8V

VOUT = 1.2V

VOUT = 3.3V

VOUT = 1.8V

VOUT = 1.2V

30

20

10

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

OUTPUT CURRENT(A)

Output Current De-rating

6.0

5.0

4.0

3.0

2.0

1.0

0.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

VOUT = 3.3V

CONDITIONS

V_IN= 12V

CONDITIONS

V_IN= 10V

T_JMAX= 125 C

θ

_JA= 16 C/W

θ_JA= 16 C/W

8x11x3mm QFN

No Air Flow

8x11x3mm QFN

No Air Flow

75 76 77 78 79 80 81 82 83 84 85

AMBIENT TEMPERATURE ( C)

75 76 77 78 79 80 81 82 83 84 85

AMBIENT TEMPERATURE ( C)

No De-rating with Air Flow

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

VOUT = 3.3V

CONDITIONS

V_IN= 12V

CONDITIONS

V_IN= 10V

T_JMAX= 125 C

θ

_JA= 13 C/W

θ_JA= 13 C/W

8x11x3mm QFN

AirFlow (200fpm)

8x11x3mm QFN

AirFlow (200fpm)

75 76 77 78 79 80 81 82 83 84 85

AMBIENT TEMPERATURE ( C)

75 76 77 78 79 80 81 82 83 84 85

AMBIENT TEMPERATURE ( C)

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Curves

Output Voltage vs. Output Current

1.005

1.205

1.204

1.203

1.202

1.201

1.200

1.199

1.198

1.197

1.196

1.195

VIN = 8V

1.004

VIN = 8V

VIN = 10V

VIN = 12V

VIN = 10V

1.003

VIN = 12V

1.002

1.001

1.000

0.999

0.998

0.997

CONDITIONS

V_{OUT_NOM}=1.0V

CONDITIONS

V_{OUT_NOM}=1.2V

0.996

0.995

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

OUTPUT CURRENT(A)

Output Voltage vs. Output Current

2.505

2.504

2.503

2.502

2.501

2.500

2.499

2.498

2.497

2.496

2.495

1.805

1.804

1.803

1.802

1.801

1.800

1.799

1.798

1.797

1.796

1.795

VIN = 8V

VIN = 10V

VIN = 12V

VIN = 8V

VIN = 10V

VIN = 12V

CONDITIONS

V_{OUT_NOM}= 1.8V

CONDITIONS

V_{OUT_NOM}= 2.5V

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

OUTPUT CURRENT(A)

Output Voltage vs. Temperature

1.204

1.203

1.202

1.201

1.200

1.199

1.198

1.197

1.196

1.204

1.203

1.202

1.201

1.200

1.199

1.198

1.197

1.196

CONDITIONS

V_IN= 8V

V_{OUT_NOM}=1.2V

CONDITIONS

V_IN= 10V

V_{OUT_NOM}=1.2V

LOAD = 0A

LOAD = 1A

LOAD = 2A

LOAD = 4A

LOAD = 6A

LOAD = 0A

LOAD = 1A

LOAD = 2A

LOAD = 4A

LOAD = 6A

-40

-15

10

35

60

85

-40

-15

10

35

60

85

AMBIENT TEMPERATURE ( C)

Enpirion Confidential

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07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Curves

Output Voltage vs. Temperature

1.204

1.203

1.202

1.201

1.200

1.199

1.198

1.197

1.196

CONDITIONS

1.203

CONDITIONS

V_IN= 14V

V_{OUT_NOM}=1.2V

V_IN= 12V

V_{OUT_NOM}=1.2V

1.202

1.201

1.200

1.199

1.198

1.197

1.196

LOAD = 0A

LOAD = 1A

LOAD = 2A

LOAD = 4A

LOAD = 6A

LOAD = 0A

LOAD = 1A

LOAD = 2A

LOAD = 4A

LOAD = 6A

-40

-15

10

35

60

85

-40

-15

10

35

60

85

AMBIENT TEMPERATURE ( C)

Enpirion Confidential

www.enpirion.com, Page 9

07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Characteristics

Enable Startup/Shutdown Waveform (0A)

Enable Startup/Shutdown Waveform (2A)

ENABLE

VOUT

POK

VOUT

POK

LOAD

CONDITIONS

VIN = 12V, VOUT = 3.3V, Load = 0A, Css = 47nF

VIN = 12V, VOUT = 3.3V, Load = 2A, Css = 47nF

CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206)

Enable Startup/Shutdown Waveform (4A)

Enable Startup/Shutdown Waveform (6A)

ENABLE

VOUT

POK

VOUT

POK

LOAD

CONDITIONS

VIN = 12V, VOUT = 3.3V, Load = 4A, Css = 47nF

VIN = 12V, VOUT = 3.3V, Load = 6A, Css = 47nF

CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206)

Power Up Waveform (0A)

Power Up Waveform (6A)

PVIN

VOUT

POK

VOUT

POK

LOAD

CONDITIONS

VIN = 12V, VOUT = 3.3V, Load = 0A, Css = 47nF

VIN = 12V, VOUT = 3.3V, Load = 6A, Css = 47nF

CIN = 22µF(1206), COUT = 2x47µF(1206)+100µF(1206)

Enpirion Confidential

www.enpirion.com, Page 10

07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Characteristics

Output Ripple at 20MHz Bandwidth

VOUT = 1V

(AC Coupled)

VOUT = 1V

(AC Coupled)

LOAD = 0A

LOAD = 6A

VOUT = 1.8V

(AC Coupled)

VOUT = 1.8V

(AC Coupled)

VOUT = 3.3V

(AC Coupled)

VOUT = 3.3V

(AC Coupled)

20mV / DIV

CONDITIONS

VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206)

CONDITIONS

VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206)

Output Ripple at 500MHz Bandwidth

LOAD = 0A

LOAD = 6A

VOUT = 1V

(AC Coupled)

VOUT = 1.8V

(AC Coupled)

VOUT = 1.8V

(AC Coupled)

VOUT = 3.3V

(AC Coupled)

VOUT = 3.3V

(AC Coupled)

20mV / DIV

CONDITIONS

VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206)

CONDITIONS

VIN = 12V, CIN = 22µF (1206), COUT = 2x47µF + 100µF (1206)

Load Transient from 0 to 3A (V_OUT=1V)

Load Transient from 0 to 6A (V_OUT=1V)

VOUT

(AC Coupled)

VOUT

(AC Coupled)

CONDITIONS

VIN = 12V, VOUT = 1.0V

CIN = 22µF (1206)

VIN = 12V, VOUT = 1.0V

CIN = 22µF (1206)

LOAD

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

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07514

September 17, 2012

Rev: A

EN2360QI

Typical Performance Characteristics

Load Transient from 0 to 3A (V_OUT=1.2V)

Load Transient from 0 to 6A (V_OUT=1.2V)

VOUT

(AC Coupled)

VOUT

(AC Coupled)

CONDITIONS

VIN = 12V, VOUT = 1.2V

CIN = 22µF (1206)

VIN = 12V, VOUT = 1.2V

CIN = 22µF (1206)

LOAD

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

Load Transient from 0 to 3A (V_OUT=1.8V)

Load Transient from 0 to 6A (V_OUT=1.8V)

VOUT

(AC Coupled)

VOUT

(AC Coupled)

CONDITIONS

VIN = 12V, VOUT = 1.8V

CIN = 22µF (1206)

VIN = 12V, VOUT = 1.8V

CIN = 22µF (1206)

LOAD

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

Load Transient from 0 to 6A (V_OUT=3.3V)

Load Transient from 0 to 3A (V_OUT=3.3V)

VOUT

(AC Coupled)

VOUT

(AC Coupled)

CONDITIONS

VIN = 12V, VOUT = 3.3V

CIN = 22µF (1206)

VIN = 12V, VOUT = 3.3V

CIN = 22µF (1206)

LOAD

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

COUT = 2x47µF (1206) + 100µF (1206)

Using Best Performance Configuration

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07514

September 17, 2012

Rev: A

EN2360QI

Functional Block Diagram

S_OUT S_IN

Digital I/O

BTMP

PG

PVIN

Linear

Regulator

UVLO

To PLL

AVINO

Thermal Limit

Current Limit

Gate Drive

NC(SW)

VOUT

10k

BGND

(-)

PWM

Comp

PGND

VDDB

(+)

Compensation

Network

PLL/Sawtooth

FADJ

EAIN

VFB

Generator

Compensation

Network

(-)

Error

Amp

(+)

Power

Good

Logic

POK

ENABLE

300k

180k

Soft Start

SS

Voltage Reference Generator

Band Gap

Reference

AVIN

AGND

Figure 4: Functional Block Diagram

Functional Description

frequency of the EN2360QI enables the use of

small size input and output capacitors, as well as a

wide loop bandwidth within a small foot print.

Synchronous Buck Converter

The EN2360QI is a highly integrated synchronous,

buck converter with integrated controller, power

MOSFET switches and integrated inductor. The

nominal input voltage (PVIN) range is 4.5V to 14V

and can support up to 6A of continuous output

current. The output voltage is programmed using

an external resistor divider network. The control

loop utilizes a Type IV Voltage-Mode compensation

network and maximizes on a low-noise PWM

topology. Much of the compensation circuitry is

internal to the device. However, a phase lead

capacitor is required along with the output voltage

feedback resistor divider to complete the Type IV

compensation network.. The high switching

Protection Features:

The power supply has the following protection

features:

•

Programmable Over-Current Protection

Thermal Shutdown with Hysteresis.

Under-Voltage Lockout Protection

Additional Features:

•

Switching Frequency Synchronization.

Programmable Soft-Start

Power OK Output Monitoring

Enpirion Confidential

www.enpirion.com, Page 13

07514

September 17, 2012

Rev: A

EN2360QI

In this application, place a 0.1µF, X7R, capacitor

between AVIN and AGND as close as possible to

AVIN. Refer to Figure 6 for a recommended

schematic for a dual input supply application.

Power Power Up Sequence

The EN2360QI is designed to be powered by either

a single input supply (PVIN) or two separate

supplies: one for PVIN and the other for AVIN.

For dual input supply applications, the sequencing

of the two input supplies, PVIN and AVIN, is very

important. There are two common acceptable turn-

on sequences for the device. AVIN can always

come up before PVIN. If PVIN comes up before

AVIN, then ENABLE should be toggled last, after

AVIN is asserted. During turn-off, the ENABLE

should be toggled low before AVIN or PVIN is

disabled.

Single Input Supply Application (PVIN):

47nF

0.22µF

V_OUT

PG BTMP VDDB BGND

VOUT

V_IN

PVIN

EN2360QI

ENABLE

R_VB

4.75k

2x

F

0805

R_A

C_A

22

1206

F

AVINO

AVIN

R_CA

F

VFB

SS

Enable Operation

47nF

The ENABLE pin provides a means to enable

normal operation or to shut down the device. A

logic high will enable the converter into normal

operation. When the ENABLE pin is asserted (high)

the device will undergo a normal soft-start, allowing

the output voltage to rise monotonically into

regulation. A logic low will disable the converter and

the device will power down in a controlled manner.

The ENABLE signal has to be low for at least the

ENABLE Lockout Time (8ms) in order for the

device to be re-enabled.

PGND

FADJ

R_B

AGND RCLX

R_FS

R_CLX

Figure 5. Single Supply Applications Circuit

The EN2360QI has an internal linear regulator that

converts PVIN to 3.3V. The output of the linear

regulator is provided on the AVINO pin once the

device is enabled. AVINO should be connected to

AVIN on the EN2360QI. In this application, the

following external components are required: Place

a 1µF, X5R/X7R, capacitor between AVINO and

AGND as close as possible to AVINO. Place a

0.1µF, X5R/X7R, capacitor between AVIN and

AGND as close as possible to AVIN. In addition,

place a resistor (R_VB) between VDDB and AVIN, as

shown in Figure 5. Enpirion recommends

R_VB=4.75kΩ. In this application, ENABLE cannot be

asserted before PVIN. If no external enable signal

is used, tying ENABLE to AVIN meets this

requirement.

Pre-Bias Precaution

The EN2360QI is not designed to be turned on into

a pre-biased output voltage. Be sure the output

capacitors are not charged or the output of the

EN2360QI is not pre-biased when the EN2360QI is

first enabled.

Frequency Synchronization

The switching frequency of the EN2360QI can be

phase-locked to an external clock source to move

unwanted beat frequencies out of band. The

internal switching clock of the EN2360QI can be

phase locked to a clock signal applied to the S_IN

pin. An activity detector recognizes the presence of

an external clock signal and automatically phase-

locks the internal oscillator to this external clock.

Phase-lock will occur as long as the input clock

frequency is in the range of 0.8MHz to 1.6MHz.

When no clock is present, the device reverts to the

free running frequency of the internal oscillator.

Adding a resistor (R_FS) to the FADJ pin will adjust

the switching frequency. If a 3kΩ resistor is placed

on FADJ the nominal switching frequency of the

EN2360QI is 1MHz. Figure 7 shows the typical R_FS

resistor value versus switching frequency.

Dual Input Supply Application (PVIN and AVIN):

Figure 6: Dual Input Supply Application Circuit

Enpirion Confidential

www.enpirion.com, Page 14

07514

September 17, 2012

Rev: A

EN2360QI

threshold to when V_OUTreaches its programmed

value.

Rfs vs. SW Frequency

1.800

1.600

1.400

1.200

1.000

0.800

0.600

POK Operation

The POK signal is an open drain signal (requires a

pull up resistor to AVIN or similar voltage) from the

converter indicating the output voltage is within the

specified range. Typically, a 100kꢀ or lower

resistance is used as the pull-up resistor. The POK

signal will be logic high (AVIN) when the output

voltage is above 90% of the programmed voltage

level. If the output voltage is below this point, the

POK signal will be a logic low. The POK signal can

be used to sequence down-stream converters by

tying to their enable pins.

CONDITIONS

V_IN= 6V to 12V

V_OUT=0.8V to 3.3V

0

2

4

6

8

10 12 14 16 18 20 22

R_FSRESISTOR VALUE (kꢀ)

Figure 7. R_FSversus Switching Frequency

Over-Current Protection (OCP)

The efficiency performance of the EN2360QI for

various VOUTs can be optimized by adjusting the

switching frequency. Table 1 shows recommended

R_FSvalues for various VOUTs in order to optimize

performance of the EN2360QI.

The current limit function is achieved by sensing

the current flowing through a sense PFET. When

the sensed current exceeds the current limit, both

power FETs are turned off for the rest of the

switching cycle. If the over-current condition is

removed, the over-current protection circuit will re-

enable PWM operation. If the over-current condition

persists, the circuit will continue to protect the load.

The OCP trip point is nominally set as specified in

the Electrical Characteristics table. In the event the

OCP circuit trips consistently in normal operation,

the device enters a hiccup mode. While in hiccup

mode, the device is disabled for a short while and

restarted with a normal soft-start. The hiccup time

is approximately 32ms. This cycle can continue

indefinitely as long as the over current condition

persists.

PVIN

VOUT

1.0V

1.2V

1.8V

2.5V

3.3V

5.0V

R_FS

3k

3.3k

4.87k

10k

15k

22k

12V

Table 1: Recommended R_FSValues

Spread Spectrum Mode

The OCP trip point can be programmed to trip at a

lower level via the RCLX pin. The value of the

resistor connected between RCLX and ground will

determine the OCP trip point. Generally, the higher

the RCLX value, the higher the current limit

threshold. Note that if RCLX pin is left open the

output current will be unlimited and the device will

not have current limit protection. Reference Table 2

for a list of recommended resistor values on RCLX

that will set the OCP trip point at the typical value of

9A, also specified in the Electrical Characteristics

table.

The external clock frequency may be swept

between 0.8MHz and 1.6MHz at repetition rates of

up to 10 kHz in order to reduce EMI frequency

components.

Soft-Start Operation

Soft start is a means to ramp the output voltage

gradually upon start-up. The output voltage rise

time is controlled by the choice of soft-start

capacitor, which is placed between the SS pin (pin

56) and the AGND pin (pin 52).

Rise Time (ms): T_R≈ C_ss[nF] x 0.06

V_OUTRange

R_CLXValue

36.5k

During start-up of the converter, the reference

voltage to the error amplifier is linearly increased to

its final level by an internal current source of

approximately 10µA. Typical soft-start rise time is

~2.8ms with SS capacitor value of 47nF. The rise

time is measured from when V_IN> V_UVLORand

ENABLE pin voltage crosses its logic high

0.6V < V_OUT≤ 0.9V

0.9V < V_OUT≤ 1.2V

1.2V < V_OUT≤ 2.0V

2.0V < V_OUT≤ 5.0V

38.4k

40.2k

45.3k

Table 2: Recommended R_CLXValues vs. V_OUT

Enpirion Confidential

www.enpirion.com, Page 15

07514

September 17, 2012

Rev: A

EN2360QI

Thermal Overload Protection

Input Under-Voltage Lock-Out (UVLO)

Thermal shutdown circuit will disable device

operation when the junction temperature exceeds

approximately 150ºC. After a thermal shutdown

event, when the junction temperature drops by

approx 20ºC, the converter will re-start with a

normal soft-start.

Internal circuits ensure that the converter will not

start switching until the input voltage is above the

specified minimum voltage. Hysteresis, input de-

glitch and output leading edge blanking ensures

high noise immunity and prevents false UVLO

triggers.

Application Information

Output Voltage Programming and Loop

Compensation

converter. The dielectric must be X5R or X7R

rated. Y5V or equivalent dielectric formulations

must not be used as these lose too much

capacitance with frequency, temperature and

bias voltage. In some applications, lower value

capacitors are needed in parallel with the larger,

capacitors in order to provide high frequency

The EN2360QI uses a Type IV Voltage Mode

compensation network. Type IV Voltage Mode

control is a proprietary Enpirion control scheme that

maximizes control loop bandwidth to deliver

excellent load transient responses and maintain

output regulation with pin point accuracy. For ease

of use, most of this network has been customized

and is integrated within the device package. The

EN2360QI output voltage is programmed using a

simple resistor divider network (R_Aand R_B). The

feedback voltage at VFB is nominally 0.6V. R_Ais

predetermined based on Table 5 and R_Bcan be

calculated based on Figure 10. The values

recommended for C_OUT, C_A, R_CAand R_EAmake up

the external compensation of the EN2360QI. It will

vary with each PVIN and VOUT combination to

optimize on performance. The EN2360QI solution

can be optimized for either smallest size or highest

performance. Please see Table 5 for a list of

recommended R_A, C_A, R_CA, R_EAand C_OUTvalues for

each solution.

decoupling.

Table

3

contains

a

list of

recommended input capacitors.

Recommended Input Capacitors

Description

MFG

P/N

22µF, 16V,

X5R, 10%,

1206

22µF, 16V,

X5R, 20%,

1206

Murata

GRM31CR61C226ME15

EMK316ABJ226ML-T

Taiyo Yuden

Table 3: Recommended Input Capacitors

Output Capacitor Selection

As seen from Table 5, the EN2360QI has been

optimized for use with one 100µF/1206 plus two

47µF/1206 output capacitors for best performance.

For the smallest solution size configuration see

Table 5. Low ESR ceramic capacitors are required

with X5R or X7R rated dielectric formulation. Y5V

or equivalent dielectric formulations must not

be used as these lose too much capacitance

with frequency, temperature and bias voltage.

Table 4 contains a list of recommended output

capacitors

Output ripple voltage is determined by the

aggregate output capacitor impedance. Capacitor

impedance, denoted as Z, is comprised of

capacitive reactance, effective series resistance,

ESR, and effective series inductance, ESL

reactance.

Figure 8: V_OUTResistor Divider & Compensation

Components. See Table 5 for details.

Input Capacitor Selection

Placing output capacitors in parallel reduces the

impedance and will hence result in lower ripple

voltage.

The EN2360QI requires

a

22µF/1206 input

capacitor. Low-cost, low-ESR ceramic capacitors

should be used as input capacitors for this

Enpirion Confidential

www.enpirion.com, Page 16

07514

September 17, 2012

Rev: A

EN2360QI

1

22µF, 10V, X5R,

20%, 0805

Panasonic

ECJ-2FB1A226M

=

+

+...+

Z_TotalZ₁Z₂

Z_n

47µF, 6.3V, X5R,

20%, 0805

Taiyo

Yuden

JMK212BBJ476MG-T

LMK212BJ226MG-T

Recommended Output Capacitors

22µF, 10V, X5R,

20%, 0805

Taiyo

Yuden

Description

MFG

P/N

47µF, 6.3V, X5R,

20%, 1206

Murata

GRM31CR60J476ME19L

Table 4: Recommended Output Capacitors

47µF, 10V, X5R,

20%, 1206

Taiyo

Yuden

LMK316BJ476ML-T

Enpirion Confidential

www.enpirion.com, Page 17

07514

September 17, 2012

Rev: A

EN2360QI

Best Performance

Smallest Solution Size

C_IN= 22µF/1206

V_OUT≤ 1.8V, C_OUT= 2x47µF/0805

3.3V > V_OUT> 1.8V, C_OUT= 2x47µF/1206

C_OUT= 100µF/1206 + 2x47µF/1206, R_A= 200kΩ

PVIN

(V)

VOUT

(V)

C_A

(pF)

R_CA

(kꢀ)

R_EA

(kꢀ)

Ripple

(mV)

Deviation

(mV)

PVIN

(V)

VOUT

(V)

R_A

C_A

R_CA

R_EA

(kꢀ)

Ripple

(mV)

Deviation

(mV)

(kꢀ) (pF) (kꢀ)

Open

0.9V

1.2V

1.5V

1.8V

2.5V

3.3V

5.0V

0.9V

1.2V

1.5V

1.8V

2.5V

15

12

10

8.2

6.8

15

12

10

12

8.2

12

18

12

8.2

12

0

5.29

6.6

26

22

24

28

54

66

28

22

28

34

50

0.9V

1.2V

1.5V

1.8V

2.5V

3.3V

5.0V

0.9V

1.2V

1.5V

1.8V

2.5V

200

10

0.2

15

19

24

43

52

66

17

18

24

26

39

51

68

0

8.39

9.7

66

14V

0

14V

200 8.2

120 8.2

120 6.8

120 5.6

66

56

0

18.8

28.8

52.1

5.22

6.51

7.5

86

15

106

152

57

0.2

15

200

120

12

10

0

70

0

70

12V

10V

8V

12V

10V

8V

0

9

80

56

16.8

94

Open

3.3V

5.0V

0.9V

10

8.2

18

12

56

0

27.3

48.5

5.01

54

74

28

3.3V

5.0V

0.9V

15

0.2

45

56

15

114

164

69

120 6.8

8.2

200

120

18

15

12

15

Open

1.2V

1.5V

1.8V

2.5V

18

15

12

15

8.2

12

0

6.11

7.3

26

28

32

44

1.2V

1.5V

1.8V

2.5V

0.2

15

19

23

29

67

78

94

98

0

8.13

16.8

56

Open

3.3V

5.0V

0.9V

12

10

22

18

12

56

0

27.2

42

68

84

26

3.3V

5.0V

0.9V

120

200

12

10

27

15

0.2

44

52

16

128

192

68

8.2

4.92

Open

1.2V

1.5V

1.8V

2.5V

18

15

18

8.2

12

0

5.41

6.48

7.32

16.1

32

36

64

1.2V

1.5V

1.8V

2.5V

200

120

22

18

27

0.2

6.8

19

23

27

36

75

82

0

104

124

56

Open

3.3V

5.0V

0.9V

15

12

22

18

12

56

0

24

31.4

4.6

72

102

30

3.3V

5.0V

0.9V

120

200

22

12

33

6.8

0.2

36

40

14

152

236

70

8.2

Open

1.2V

1.5V

1.8V

22

18

8.2

12

0

5.59

5.88

7.12

32

36

38

1.2V

1.5V

1.8V

200

33

27

0.2

17

21

24

80

96

6.6V

110

Open

2.5V

3.3V

0.9V

22

18

27

12

18

56

0

15.4

21.6

3.93

56

78

32

2.5V

3.3V

0.9V

120

200

39

27

68

4.3

0.2

29

28

13

140

184

80

8.2

Open

1.2V

1.5V

22

8.2

12

0

4.4

38

1.2V

1.5V

200

56

47

0.2

15

17

92

5V

5.91

106

Open

1.8V

2.5V

22

27

12

0

6.91

13.6

42

76

1.8V

2.5V

200

120

39

68

0.2

19

21

124

172

56

Table 5: R_A, C_A, R_CAand R_EAValues for Various PVIN/VOUT Combinations: Smallest Solution Size vs. Best

Performance. See Figure 8. Use the equation in Figure 8 to calculate R_B.

Note 6: Nominal Deviation is for a 6A load transient step.

Note 7: For compensation values of output voltage in between the specified output voltages, choose compensation values

of the lower output voltage setting.

Enpirion Confidential

www.enpirion.com, Page 18

07514

September 17, 2012

Rev: A

EN2360QI

Thermal Considerations

Thermal considerations are important power supply

design facts that cannot be avoided in the real

world. Whenever there are power losses in a

system, the heat that is generated by the power

dissipation needs to be accounted for. The Enpirion

PowerSoC helps alleviate some of those concerns.

η = P_OUT/ P_IN= 87% = 0.87

P_IN= P_OUT/ η

P_IN≈ 13.2W / 0.87 ≈ 22.76W

The power dissipation (P_D) is the power loss in the

system and can be calculated by subtracting the

output power from the input power.

The Enpirion EN2360QI DC-DC converter is

packaged in an 8x11x3mm 68-pin QFN package.

The QFN package is constructed with copper lead

frames that have exposed thermal pads. The

exposed thermal pad on the package should be

soldered directly on to a copper ground pad on the

printed circuit board (PCB) to act as a heat sink.

The recommended maximum junction temperature

for continuous operation is 125°C. Continuous

operation above 125°C may reduce long-term

reliability. The device has a thermal overload

protection circuit designed to turn off the device at

an approximate junction temperature value of

150°C.

P_D= P_IN– P_OUT

≈ 22.76W – 19.8W ≈ 2.96W

With the power dissipation known, the temperature

rise in the device may be estimated based on the

theta JA value (θ_JA). The θ_JAparameter estimates

how much the temperature will rise in the device for

every watt of power dissipation. The EN2360QI has

a θ_JAvalue of 16 ºC/W without airflow.

Determine the change in temperature (ΔT) based

on P_Dand θ_JA.

ΔT = P_Dx θ_JA

ΔT ≈ 2.96W x 16°C/W = 47.36°C ≈ 47°C

The following example and calculations illustrate

the thermal performance of the EN2360QI.

The junction temperature (T_J) of the device is

approximately the ambient temperature (T_A) plus

the change in temperature. We assume the initial

ambient temperature to be 25°C.

Example:

V_IN= 12V

V_OUT= 3.3V

T_J= T_A+ ΔT

I_OUT= 6A

T_J≈ 25°C + 47°C ≈ 72°C

First calculate the output power.

The maximum operating junction temperature

(T_JMAX) of the device is 125°C, so the device can

operate at a higher ambient temperature. The

maximum ambient temperature (T_AMAX) allowed can

be calculated.

P_OUT= 3.3V x 6A = 19.8W

Next, determine the input power based on the

efficiency (η) shown in Figure 9.

Efficiency vs. Output Current

T

_AMAX= T_JMAX– P_Dx θ_JA

≈ 125°C – 47°C ≈ 78°C

100

90

80

70

60

50

40

The maximum ambient temperature the device can

reach is 78°C given the input and output conditions.

Note that the efficiency will be slightly lower at

higher temperatures and this calculation is an

estimate.

CONDITIONS

V_IN= 12.0V

AVIN = 3.3V

Dual Supply

VOUT = 3.3V

VOUT = 1.8V

VOUT = 1.2V

30

20

10

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

OUTPUT CURRENT (A)

Figure 9: Efficiency vs. Output Current

For V_IN= 12V, V_OUT= 3.3V at 6A, η ≈ 90%

Enpirion Confidential

www.enpirion.com, Page 19

07514

September 17, 2012

Rev: A

EN2360QI

Engineering Schematic

Figure 10: Engineering Schematic with Engineering Notes

Enpirion Confidential

www.enpirion.com, Page 20

07514

September 17, 2012

Rev: A

EN2360QI

Layout Recommendation

Recommendation 4: The thermal pad underneath

the component must be connected to the system

ground plane through as many vias as possible.

The drill diameter of the vias should be 0.33mm,

and the vias must have at least 1 oz. copper plating

on the inside wall, making the finished hole size

around 0.20-0.26mm. Do not use thermal reliefs or

spokes to connect the vias to the ground plane.

This connection provides the path for heat

dissipation from the converter.

Recommendation 5: Multiple small vias (the same

size as the thermal vias discussed in

recommendation 4) should be used to connect

ground terminal of the input capacitor and output

capacitors to the system ground plane. It is

preferred to put these vias along the edge of the

GND copper closest to the +V copper. These vias

connect the input/output filter capacitors to the

GND plane, and help reduce parasitic inductances

in the input and output current loops. If vias cannot

be placed under the capacitors, then place them on

both sides of the slit in the top layer PGND copper.

Recommendation 6: AVIN is the power supply for

the small-signal control circuits. It should be

connected to the input voltage at a quiet point. In

Figure 11 this connection is made at the input

capacitor.

Recommendation 7: The layer 1 metal under the

device must not be more than shown in Figure 11.

Refer to the section regarding Exposed Metal on

Bottom of Package. As with any switch-mode

DC/DC converter, try not to run sensitive signal or

control lines underneath the converter package on

other layers.

Recommendation 8: The V_OUTsense point should

be just after the last output filter capacitor. Keep the

sense trace short in order to avoid noise coupling

into the node. Contact Enpirion Technical Support

for any remote sensing applications.

Recommendation 9: Keep R_A, C_A, R_B, and R_CA

close to the VFB pin (Refer to Figure 11). The VFB

pin is a high-impedance, sensitive node. Keep the

trace to this pin as short as possible. Whenever

possible, connect R_Bdirectly to the AGND (pin 52,

53) instead of going through the GND plane.

Figure 11: Top Layer Layout with Critical Components

(Top View). See Figure 10 for corresponding schematic.

This layout only shows the critical components and

top layer traces for minimum footprint in single-

supply mode with ENABLE tied to AVIN. Alternate

circuit configurations & other low-power pins need

to be connected and routed according to customer

application. Please see the Gerber files at

www.enpirion.com for details on all layers.

Recommendation 1: Input and output filter

capacitors should be placed on the same side of

the PCB, and as close to the EN2360QI package

as possible. They should be connected to the

device with very short and wide traces. Do not use

thermal reliefs or spokes when connecting the

capacitor pads to the respective nodes. The +V and

GND traces between the capacitors and the

EN2360QI should be as close to each other as

possible so that the gap between the two nodes is

minimized, even under the capacitors.

Recommendation 2: The PGND connections for

the input and output capacitors on layer 1 need to

have a slit between them in order to provide some

separation between input and output current loops.

Recommendation 3: The system ground plane

should be the first layer immediately below the

surface layer. This ground plane should be

continuous and un-interrupted below the converter

and the input/output capacitors.

Recommendation 10: Follow all the layout

recommendations as close as possible to optimize

performance. Enpirion provides schematic and

layout reviews for all customer designs. Contact

Enpirion Applications Engineering for detailed

support (techsupport@enpirion.com).

Enpirion Confidential

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EN2360QI

Design Considerations for Lead-Frame Based Modules

Exposed Metal on Bottom of Package

Lead-frames offer many advantages in thermal performance, in reduced electrical lead resistance, and in

overall foot print. However, they do require some special considerations.

In the assembly process lead frame construction requires that, for mechanical support, some of the lead-frame

cantilevers be exposed at the point where wire-bond or internal passives are attached. This results in several

small pads being exposed on the bottom of the package, as shown in Figure 10.

Only the thermal pad and the perimeter pads are to be mechanically or electrically connected to the PC board.

The PCB top layer under the EN2360QI should be clear of any metal (copper pours, traces, or vias) except for

the thermal pad. The “shaded-out” area in Figure 10 represents the area that should be clear of any metal on

the top layer of the PCB. Any layer 1 metal under the shaded-out area runs the risk of undesirable shorted

connections even if it is covered by soldermask.

The solder stencil aperture should be smaller than the PCB ground pad. This will prevent excess solder from

causing bridging between adjacent pins or other exposed metal under the package. Please consult the

Enpirion Manufacturing Application Note for more details and recommendations.

Figure 12: Lead-Frame exposed metal (Bottom View)

Shaded area highlights exposed metal that is not to be mechanically or electrically connected to the PCB.

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Recommended PCB Footprint

Figure 13: EN2360QI PCB Footprint (Top View)

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Package and Mechanical

Figure 14: EN2360QI Package Dimensions (Bottom View)

Packing and Marking Information: http://www.enpirion.com/resource-center-packing-and-marking-information.htm

Contact Information

Enpirion, Inc.

Perryville III Corporate Park

53 Frontage Road - Suite 210

Hampton, NJ 08827 USA

Phone: 1.908.894.6000

Fax: 1.908.894.6090

Enpirion reserves the right to make changes in circuit design and/or specifications at any time without notice. Information furnished by Enpirion is

believed to be accurate and reliable. Enpirion assumes no responsibility for its use or for infringement of patents or other third party rights, which may

result from its use. Enpirion products are not authorized for use in nuclear control systems, as critical components in life support systems or equipment

used in hazardous environment without the express written authority from Enpirion

Enpirion Confidential

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型号：	EN2360QI
厂家：	ENPIRION, INC.
描述：	6A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor 6A电压模式同步降压PWM DC -DC转换器集成电感器转换器电感器开关
文件：	总24页 (文件大小：1531K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EN2360QI [ENPIRION]

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