FAN5350MPX_技术文档

July 2007

FAN5350

3MHz, 600mA Step-Down DC-DC Converter in

Chip-Scale and MLP Packaging

Features

Description

The FAN5350 is a step-down switching voltage regulator

that delivers a fixed 1.82V from an input voltage supply

of 2.7V to 5.5V. Using a proprietary architecture with

synchronous rectification, the FAN5350 is capable of

delivering 600mA at over 90% efficiency, while

maintaining a very high efficiency of over 80% at load

currents as low as 1mA. The regulator operates at a

nominal fixed frequency of 3MHz at full load, which

reduces the value of the external components to 1µH for

the output inductor and 4.7µF for the output capacitor.

3MHz Fixed-Frequency Operation

16µA Typical Quiescent Current

600mA Output Current Capability

2.7V to 5.5V Input Voltage Range

1.82V Fixed Output Voltage

Synchronous Operation

Power-Save Mode

At moderate and light loads, pulse frequency modulation

is used to operate the device in power-save mode with a

typical quiescent current of 16µA. Even with such a low

quiescent current, the part exhibits excellent transient

response during large load swings. At higher loads, the

system automatically switches to fixed-frequency

control, operating at 3MHz. In shutdown mode, the

supply current drops below 1µA, reducing power

consumption.

Soft-Start Capability

Input Under-Voltage Lockout (UVLO)

Thermal Shutdown and Overload Protection

6-Lead 3 x 3mm MLP

5-Bump 1 x 1.37mm WLCSP

Applications

The FAN5350 is available in a 6-lead Molded Leadless

Package (MLP) and a 5-bump Wafer Level Chip Scale

Package (WLCSP).

Cell Phones, Smart-Phones

Pocket PCs

WLAN DC-DC Converter Modules

PDA, DSC, PMP, and MP3 Players

Portable Hard Disk Drives

Ordering Information

Operating

Temperature Range

Part Number Pb-Free

Package

Packing Method

FAN5350UCX

FAN5350MPX

Yes

-40°C to 85°C

WLCSP-5 1x1.37mm

MLP-6 3 x 3mm

Tape and Reel⁽¹⁾

Note:

1. Please refer to tape and reel specifications on www.fairchildsemi.com; http://www.fairchildsemi.com/packaging.

FAN5350 Rev. 1.0.1

www.fairchildsemi.com

Typical Applications

4.7µF

V_IN

C_IN

PGND

VIN

1

2

3

6

5

4

V_IN

4.7µF

C_IN

VIN

GND

A1 A3

P1

(GND)

AGND

FB

SW

EN

L1

B2

SW

FB

V_OUT

1µH

EN

C1

C3

4.7µF

C_OUT

L1

V_OUT

C_OUT

1µΗ

4.7µF

Figure 1. WLCSP (top view)

Figure 2. MLP (top view)

Block Diagram

VIN

Current Limit

Bias

EN

1.8V

Reference

+

-

SW

Modulator

Logic

Driver

FB

3MHz OSC

Zero Crossing

GND

Figure 3. Block Diagram

FAN5350 Rev. 1.0.1

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2

Pin Configurations

A1 A3

A3 A1

B2

VIN

GND

SW

GND

SW

VIN

B2

EN C1 C3 FB

FB C3 C1 EN

Figure 4. WLCSP - Bumps Facing Down

Figure 5. WLCSP - Bumps Facing Up

PGND

AGND

FB

1

2

3

6

5

4

VIN

SW

EN

P1

(GND)

Figure 6. 3x3mm MLP - Leads Facing Down

Pin Definitions

WLCSP

Pin #

A1

Name Description

V_IN

Power Supply Input.

A3

GND

Ground Pin. Signal and power ground for the part.

Enable Pin. The device is in shutdown mode when voltage to this pin is <0.4V and enabled

when >1.2V. Do not leave this pin floating.

C1

EN

C3

B2

FB

Feedback Analog Input. Connect directly to the output capacitor.

SW

Switching Node. Connection to the internal PFET switch and NFET synchronous rectifier.

MLP

Pin #

Name Description

Power Ground Pin. Power stage ground. Connect PGND and AGND together via the board

ground plane.

1

PGND

2

3

AGND

FB

Analog Ground Pin. Signal ground for the part.

Feedback Analog Input. Connect directly to the output capacitor.

Enable Pin. The device is in shutdown mode when voltage to this pin is <0.4V and enabled

when >1.2V. Do not leave this pin floating.

4

EN

5

6

SW

V_IN

Switching Node. Connection to the internal PFET switch and NFET synchronous rectifier.

Power Supply Input.

FAN5350 Rev. 1.0.1

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3

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.

The absolute maximum ratings are stress ratings only.

Symbol

Parameter

Min.

-0.3

-40

Max.

6.0

Unit

V

Input Voltage with respect to GND

V_IN

Voltage on any other pin with respect to GND

Junction Temperature

V_IN

V

T_J

T_STG

T_L

150

260

°C

kV

V

Storage Temperature

-65

Lead Temperature (Soldering 10 Seconds)

Human Body Model

4.5

1.5

200

ESD

Electrostatic Discharge Protection Level

Charged Device Model

Machine Model

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended

operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to Absolute Maximum Ratings.

Symbol

V_CC

I_OUT

L

Parameter

Min.

2.7

0

Typ.

Max.

5.5

Unit

V

Supply Voltage Range

Output Current

600

mA

µH

µF

°C

Inductor

0.7

3.3

-40

1.0

4.7

3.0

C_IN

Input Capacitor

12.0

+85

+125

C_OUT

T_A

Output Capacitor

Operating Ambient Temperature

Operating Junction Temperature

T_J

°C

Thermal Properties

Symbol

Parameter

Min.

Typ.

Max.

Units

Junction-to-Ambient Thermal Resistance⁽²⁾

°C/W

180

49

Θ_{JA_WLCSP}

Θ_{JA_MLP}

Note:

2. Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with

four-layer 1s2p boards in accordance to JESD51- JEDEC standard. Special attention must be paid not to exceed

junction temperature T_J(max)at a given ambient temperate T_A.

FAN5350 Rev. 1.0.1

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4

Electrical Characteristics

Minimum and maximum values are at V_IN= 2.7V to 5.5V, T_A= -40°C to +85°C, C_IN= C_OUT= 4.7µF, L = 1µH, unless

otherwise noted. Typical values are at T_A= 25°C, V_IN=3.6V.

Symbol

Parameter

Conditions

Min.

Typ.

Max. Units

Power Supplies

Device is not switching, EN=V_IN

Device is switching, EN=V_IN

V_IN= 3.6V, EN = GND

Rising Edge

16

18

µA

I_Q

Quiescent Current

25

µA

I_(SD)

Shutdown Supply Current

0.05

1.00

2.1

1.8

1.75

1.2

V_UVLO

Under-Voltage Lockout Threshold

V

Falling Edge

1.95

V_(ENH)

V_(ENL)

Enable HIGH-Level Input Voltage

Enable LOW-Level Input Voltage

Enable Input Leakage Current

V

0.4

I_(EN)

EN = V_INor GND

0.01

3.0

1.00

µA

Oscillator

f_0SC

Oscillator Frequency

2.5

3.5

MHz

Regulation

I_LOAD= 0 to 600mA

CCM

1.775

1.784

1.820

1.865

1.856

300

V

V_O

Output Voltage Accuracy

t_SS

Soft-Start

EN = 0 -> 1

µs

Output Driver

PMOS On Resistance

V_IN= V_GS= 3.6V

Open-Loop⁽³⁾

CCM Only

180

170

800

150

20

mΩ

mA

°C

R_DS(on)

NMOS On Resistance

PMOS Peak Current Limit

Thermal Shutdown

I_LIM

650

900

T_TSD

T_HYS

Thermal Shutdown Hysteresis

°C

Note:

3. The Electrical Characteristics table reflects open-loop data. Refer to Operation Description and Typical

Characteristic for closed-loop data.

FAN5350 Rev. 1.0.1

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5

Operation Description

The FAN5350 is a step-down switching voltage regulator

that delivers a fixed 1.82V from an input voltage supply of

2.7V to 5.5V. Using a proprietary architecture with

synchronous rectification, the FAN5350 is capable of

delivering 600mA at over 90% efficiency, while

maintaining a light load efficiency of over 80% at load

currents as low as 1mA. The regulator operates at a

nominal frequency of 3MHz at full load, which reduces the

value of the external components to 1µH for the output

inductor and 4.7µF for the output capacitor.

Enable and Soft Start

Maintaining the EN pin LOW keeps the FAN5350 in

non-switching mode in which all circuits are off and the

part draws ~50nA of current. Increasing EN above its

threshold voltage activates the part and starts the soft-

start cycle. During soft start, the current limit is

increased in discrete steps so that the inductor current is

increased in a controlled manner. This minimizes any

large surge currents on the input and prevents any

overshoot of the output voltage.

Control Scheme

The FAN5350 uses a proprietary non-linear, fixed-

frequency PWM modulator to deliver a fast load

Under-Voltage Lockout

When EN is high, the under-voltage lock-out keeps the

part from operating until the input supply voltage rises

high enough to properly operate. This ensures no

misbehavior of the regulator during start-up or shutdown.

transient response, while maintaining

a

constant

switching frequency over a wide range of operating

conditions. The regulator performance is independent of

the output capacitor ESR, allowing for the use of

ceramic output capacitors. Although this type of

operation normally results in a switching frequency that

varies with input voltage and load current, an internal

frequency loop holds the switching frequency constant

over a large range of input voltages and load currents.

Current Limiting

A heavy load or short circuit on the output causes the

current in the inductor to increase until a maximum

current threshold is reached in the high-side switch.

Upon reaching this point, the high-side switch turns off,

preventing high currents from causing damage.

For very light loads, the FAN5350 operates in

discontinuous current (DCM) single-pulse PFM mode,

which produces low output ripple compared with other

PFM architectures. Transition between PWM and PFM

is seamless, with a glitch of less than 14mV at V_OUT

during the transition between DCM and CCM modes.

The peak current limit shown in Figure 16, I_LIM(PK)is

slightly higher than the open-loop tested current limit,

I

_LIM(OL), in the Electrical Characteristics table. This is

primarily due to the effect of propagation delays of the

IC current limit comparator.

Combined with exceptional transient response

characteristics, the very low quiescent current of the

controller (<16µA) maintains high efficiency, even at

very light loads, while preserving fast transient response

for applications requiring very tight output regulation.

Thermal Shutdown

When the die temperature increases, due to a high load

condition and/or a high ambient temperature, the output

switching is disabled until the temperature on the die

has fallen sufficiently. The junction temperature at which

the thermal shutdown activates is nominally 150°C with

a 20°C hysteresis.

FAN5350 Rev. 1.0.1

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6

Applications Information

Selecting the Inductor

The output inductor must meet both the required

inductance and the energy handling capability of the

application.

The increased RMS current produces higher losses

through the R_DS(ON)of the IC MOSFETs as well as the

inductor ESR.

Increasing the inductor value produces lower RMS

currents, but degrades transient response. For a given

physical inductor size, increased inductance usually

results in an inductor with lower saturation current.

The inductor value affects the average current limit, the

PWM-to-PFM transition point, the output voltage ripple,

and the efficiency.

Table 1 shows the effects of inductance higher or lower

than the recommended 1μH on regulator performance.

The ripple current (∆I) of the regulator is:

⎛

⎜

⎝

⎞

⎟

⎠

V_OUT

V

− V_OUT

L • F_SW

IN

Output Capacitor

ΔI ≈

•

EQ. 1

V

IN

Table 2 suggests 0603 capacitors. 0805 capacitors may

further improve performance in that the effective

capacitance is higher and ESL is lower than 0603. This

improves the transient response and output ripple.

The maximum average load current, I_MAX(LOAD)is related

to the peak current limit, I_LIM(PK)(see figure 17) by the

ripple current:

Increasing C_OUThas no effect on loop stability and can

therefore be increased to reduce output voltage ripple or

to improve transient response. Output voltage ripple,

∆V_OUT, is:

ΔI

2

EQ. 2

I_MAX(LOAD)= I_LIM(PK)

−

The transition between PFM and PWM operation is

determined by the point at which the inductor valley

current crosses zero. The regulator DC current when the

inductor current crosses zero, I_DCM, is:

⎛

⎜

⎝

⎞

⎟

⎠

1

ΔV_OUT= ΔI•

+ ESR

EQ. 5

8 • C_OUT•F_SW

ΔI

2

I_DCM

=

EQ. 3

Input Capacitor

The 4.7μF ceramic input capacitor should be placed as

close as possible between the VIN pin and GND to

minimize the parasitic inductance. If a long wire is used

to bring power to the IC, additional “bulk” capacitance

(electrolytic or tantalum) should be placed between C_IN

and the power source lead to reduce ringing that can

occur between the inductance of the power source leads

and C_IN.

The FAN5350 is optimized for operation with L=1μH, but

is stable with inductances ranging from 700nH to 3.0μH.

The inductor should be rated to maintain at least 80% of

its value at I_LIM(PK)

.

Efficiency is affected by the inductor DCR and

inductance value. Decreasing the inductor value for a

given physical size typically decreases the DCR; but

since ∆I increases, the RMS current increases, as do

the core and skin effect losses.

ΔI²

12

2

EQ. 4

I_RMS

=

I_OUT(DC)

+

Inductor Value

Increase

I_MAX(LOAD)EQ. 2

Increase

I_LIM(PK)

Decrease

Increase

∆V_OUTEQ. 5

Decrease

Increase

Transient Response

Degraded

Decrease

Improved

Table 1. Effects of changes in inductor value (from 1µH recommended value) on regulator performance

FAN5350 Rev. 1.0.1

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7

PCB Layout Guidelines

For the bill of materials of the FAN5350 evaluation

board, see Table 1. There are only three external

components: the inductor and the input and output

capacitors. For any buck switcher IC, including the

FAN5350, it is always important to place a low-ESR

input capacitor very close to the IC, as shown in Figure

7. That ensures good input decoupling, which helps

reduce the noise appearing at the output terminals and

ensures that the control sections of the IC do not

behave erratically due to excessive noise. This reduces

switching cycle jitter and ensures good overall

performance. It is not considered critical to place either

the inductor or the output capacitor very close to the IC.

There is some flexibility in moving these two

components further away from the IC.

Description

Qty.

Ref.

Vendor

TOKO

Part Number

1117AS-1R2M

1.2μH, 1.8A, 55mΩ

Inductor

1

L1

FDK

MIPSA2520D1R0

CBC3225T15MR

GRM39 X5R 475K 6.3

FAN5350UCX

1.3μH, 1.2A, 90mΩ

1.5μH, 1.3A

Taiyo Yuden

MURATA

Fairchild

Any

2

1

C_IN,C_OUT

U1

Capacitor 4.7μF, ±10%, 6.3V, X5R, 0603

IC DC/DC Regulator in CSP, 5 bumps

Load Resistor (Optional)

R_LOAD

Table 2. FAN5350 Evaluation Board Bill of Materials (optional parts are installed by request only)

Feedback Loop

One key advantage of the non-linear architecture is that

there is no traditional feedback loop. The loop response

to changes in V_OUTis essentially instantaneous, which

explains its extraordinary transient response. The

absence of a traditional, high-gain compensated linear

loop means that the FAN5350 is inherently stable over a

wide range of L_OUTand C_OUT

.

L_OUTcan be reduced further for a given application,

provided it is confirmed that the calculated peak current

for the required maximum load current is less than the

minimum of the closed-loop current limit. The advantage

is that this generally leads to improved transient

response, since a small inductance allows for a much

faster increase in current to cope with any sudden load

demand.

The inductor can be increased to 2.2µH; but, for the

same reason, the transient response gets slightly

degraded. In that case, increasing the output capacitor

to 10µF helps significantly.

Figure 7. The FAN5350 Evaluation Board PCB (CSP)

FAN5350 Rev. 1.0.1

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8

Typical Performance Characteristics

V_IN= 3.6V, T_A= 25°C, V_EN= V_IN, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.

1850

24

22

20

18

1840

DCM spreading

+85°C

1830

1820

1810

CCM

+25°C

16

14

-40°C

1800

1790

12

10

0

100

200

300

400

500

600

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Battery Voltage (V)

Load Current (mA)

Figure 8. Quiescent Current vs. Battery Voltage

Figure 9. Load Regulation, Increasing Load

600

500

400

85°C CCM border

-30°C CCM border

500

400

300

200

100

0

Continuous Conduction Mode

Hysteresis

Switching mode

changes at these

borders

300

200

100

0

85°C DCM border

-30°C DCMborder

Discontinuous Conduction Mode

2.5

3.0

3.5

4.0

4.5

5.0

5.5

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Battery Voltage (V)

Figure 10. Switch Mode Operating Areas

Figure 11. Switch Mode Over Temperature

2.00

1835

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0

1830

1825

V

_IN=2.7V

V_IN=5.5V

V_IN=2.7V

1820

1815

V_IN=3.6V

V_IN=5.5V

V_IN=3.6V

1810

1805

I_LOAD=300mA

60 80

1800

-40

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

-20

0

20

40

Load Current (A)

Ambient Temperature (°C)

Figure 12. DC Current Voltage Output Characteristics

Figure 13. Output Voltage vs. Temperature

www.fairchildsemi.com

FAN5350 Rev. 1.0.1

9

Typical Performance Characteristics (Continued)

V_IN= 3.6V, T_A= 25°C, V_EN= V_IN, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.

100

95

90

85

80

75

100

95

90

85

80

75

V_IN=2.5V

V^IN=2.7V

V_IN=3.3V

V_IN=3.6V

V_IN=4.2V

V_IN=5V

-40°C

+85°C

+25°C

70

65

60

V_IN=5.5V

0.001

0.010

0.100

1.000

0.001

0.010

0.100

1.000

Load Current (A)

Figure 14. Power Efficiency vs. Load Current

Figure 15. Power Efficiency Over Temperature Range

1.3

250

200

V_IN=5.5V

1.2

1.1

150

+85°C

1.0

V_IN=3.6V

100

0.9

+25°C

50

0.8

V_IN=2.7V

-40°C

0

2.5

0.7

3.0

3.5

4.0

4.5

5.0

5.5

-40

-20

0

20

40

60

80

Battery Voltage (V)

Ambient Temperature (°C)

Figure 16. PMOS Current Limit in Closed Loop

Figure 17. Shutdown Supply Current vs.

Battery Voltage

85dB

3.3

250mA Load

3.2

3.1

3.0

2.9

2.8

2.7

-40°C

+25°C

5dB

/div

+85°C

2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5

35dB

1Hz

10Hz

100Hz

1kHz

10kHz

Battery Voltage (V)

Figure 18. Power Supply Rejection Ratio in CCM

Figure 19. Switching Frequency in CCM

FAN5350 Rev. 1.0.1

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10

Typical Performance Characteristics (Continued)

V_IN= 3.6V, T_A= 25°C, V_EN= V_IN, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.

I_L, 0.5A / div.

V

_OUT, 0.5V / div.

V

_OUT, 0.5V / div.

EN, 5.0V / div.

H scale: 20µs / div.

Figure 20. Start-Up, Full Load

H scale: 10µs / div.

Figure 21. Start-Up, No Load

V

_OUT(ac), 20mV / div.

V

_OUT(ac), 20mV / div.

I_LOAD, 0.5A / div.

H scale: 1µs / div.

Figure 22. Fast Load Transient, No Load to Full Load

H scale: 1µs / div.

Figure 23. Fast Load Transient, Full Load to No Load

V_SW, 5V / div.

V

_OUT(ac), 20mV / div.

V_OUT(ac), 20mV / div.

I

_LOAD= 600mA

I_LOAD= 300mA

I_LOAD= 50mA

I

_LOAD= 1mA

H scale: 20µs / div.

Figure 24. Fast Load Transient in CCM

Figure 25. Fast Load Transient in DCM

FAN5350 Rev. 1.0.1

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11

Typical Performance Characteristics (Continued)

V_IN= 3.6V, T_A= 25°C, V_EN= V_IN, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.

V_SW, 2V / div.

V_SW, 5V / div.

V_OUT(ac), 20mV / div.

I_LOAD, 0.2A / div.

I

_LOAD= 300mA

_LOAD= 20mA

I

H scale: 20µs / div.

Figure 26. Fast Load Transient DCM – CCM – DCM

H scale: 2ms / div.

Figure 27. Slow Load Transient DCM – CCM – DCM

V_OUT(ac), 20mV / div.

V_IN= 3.6V

V

_IN= 3.0V

V_IN= 3.0V

H scale: 10µs / div.

Figure 28. Line Transient, 600mV, 50mA Load

Figure 29. Line Transient, 600mV, 50mA Load

V_OUT(ac), 10mV / div.

V_IN= 3.6V

V_IN= 3.0V

I_LOAD= 350mA

I_LOAD= 100mA

H scale: 5µs / div.

Figure 30. Combined Line (600mV) and Load (100mA to 350mA) Transient Response

V_SW, 2V / div.

I_L= 0.2A / div.

I_L= 0.1A / div.

_OUT(ac), 20mV / div.

V

_OUT(ac), 20mV / div.

H scale: 1µs / div.

H scale: 200µs / div.

Figure 32. Typical Waveforms in CCM, 150mA Load

Figure 31. Typical Waveforms in DCM, 50mA Load

FAN5350 Rev. 1.0.1

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12

Physical Dimensions

Dimensions are in millimeters unless otherwise noted.

Figure 33. 6-Lead Molded Leadless Package (MLP)

FAN5350 Rev. 1.0.1

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13

Physical Dimensions (Continued)

Dimensions are in millimeters unless otherwise noted.

F

BALL A1

INDEX AREA

A

E

(0.50)

(0.866)

(Ø0.25)

Cu PAD

B

D

0.03 C

A1

2X

(Ø0.35)

SOLDER MASK

OPENING

F

(0.433)

0.03 C

2X

RECOMMENDED LAND PATTERN (NSMD)

TOP VIEW

0.332±0.018

0.06 C

E

0.625 MAX

0.250±0.025

0.05 C

D

C

SEATING PLANE

SIDE VIEWS

(X)+/-.018

F

A. NO JEDEC REGISTRATION APPLIES

B. DIMENSIONS ARE IN MILLIMETERS.

0.005

C A B

0.50

5 X Ø0.315 +/- .025

0.50

C. DIMENSIONS AND TOLERANCES PER

ASME Y14.5M, 1994

C

D

E

F

DATUM C, THE SEATING PLANE, IS DEFINED

BY THE SPHERICAL CROWNS OF THE BALLS.

PACKAGE TYPICAL HEIGHT IS 582 MICRONS

+/- 43 MICRONS (539-625 MICRONS)

FOR DIMENSIONS D, E, X, AND Y SEE

PRODUCT DATASHEET.

B

A

0.433

1 2 3

BOTTOM VIEW

(Y)+/-.018

F

G. BALL COMPOSITION: Sn95.5Ag3.9Cu0.6

SAC405 ALLOY

H. DRAWING FILENAME: MKT-UC005AArev3

Product Specific Dimensions

Product

D

E

X

Y

FAN5350UCX

1.370 +/- 0.030

1.000 +/- 0.030

0.270

0.272

Figure 34. 5-Bump Wafer-Level Chip-Scale Package (WLCSP)

FAN5350 Rev. 1.0.1

www.fairchildsemi.com

14

FAN5350 Rev. 1.0.1

www.fairchildsemi.com

15


型号：	FAN5350MPX
厂家：	FAIRCHILD SEMICONDUCTOR
描述：	3MHz, 600mA Step-Down DC-DC Converter in Chip-Scale and MLP Packaging 3MHz的，在芯片规模和MLP封装600mA降压DC- DC转换器转换器
文件：	总15页 (文件大小：479K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FAN5350MPX [FAIRCHILD]

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