FAN5354 查看數據表（PDF） - ON Semiconductor

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FAN5354

3 MHz, 3 A Synchronous Buck Regulator

ON Semiconductor 

Electrical Characteristics

Minimum and maximum values are at VIN=2.7 V to 5.5 V, TA=-40°C to +85°C, unless otherwise noted. Typical values are at

TA=25°C, VIN=5 V.

Symbol Parameter

Power Supplies

IQ Quiescent Current

I SD Shutdown Supply Current

VUVLO Under-Voltage Lockout Threshold

VUVHYST Under-Voltage Lockout Hysteresis

Logic Pins

VIH

VIL

VLHYST

IIN

IOUTL

HIGH-Level Input Voltage

LOW-Level Input Voltage

Logic Input Hysteresis Voltage

Input Bias Current

PGOOD Pull-Down Current

IOUTH PGOOD HIGH Leakage Current

VOUT Regulation

VREF

Output Reference DC Accuracy

Measured at FB Pin

VREG VOUT DC Accuracy

VOUT

ILOAD

VOUT

VIN

Load Regulation

Line Regulation

Transient Response

Power Switch and Protection

RDS(ON)P P-Channel MOSFET On Resistance

RDS(ON)N N-Channel MOSFET On Resistance

ILIMPK P-MOS Peak Current Limit

TLIMIT Thermal Shutdown

THYST Thermal Shutdown Hysteresis

VSDWN Input OVP Shutdown

Frequency Control

fSW Oscillator Frequency

fSYNC MODE Pin Synchronization Range

fPFM(MIN) Minimum PFM Frequency

Soft-Start

tSS Regulator Enable to Regulated VOUT

VSLEW Soft-Start VREF Slew Rate

Conditions

Min. Typ. Max. Units

ILOAD=0, MODE=0

ILOAD=0, MODE=1 (Forced PWM)

EN=GND

VIN Rising

VIN Falling

270

A

14

mA

0.1 3.0 A

2.83 2.95 V

2.10 2.30 2.40 V

530

mV

Input Tied to GND or VIN

VPGOOD=0.4 V

VPGOOD=VIN

TA=25°C

At VOUT Pin W.R.T. Calculated Value,

ILOAD=500 mA

IOUT(DC)=1 to 3 A

1.05

V

0.4 V

100

mV

0.01 1.00 A

1 mA

0.01 1.00 A

0.792 0.800 0.808 V

0.788 0.800 0.812 V

1.6

+1.6 %

–0.03

%/A

2.7 V ≤ VIN ≤ 5.5 V, IOUT(DC)=1.5 A

ILOAD Step 0.1 A to 1.5 A, tr=tf=100 ns,

VOUT=1.2 V

Rising Threshold

Falling Threshold

0.01

%/V

±40

mV

60

mΩ

40

mΩ

3.75 4.55 5.50 A

150

°C

20

°C

6.2

V

5.50 5.85

V

2.7 3.0 3.3 MHz

External Square-Wave, 30% to 70% Duty Cycle 2.7 3.0 3.3 MHz

TA = 25°C, VIN = 5.0 V

17 26 36 kHz

RLOAD > 5 , to VOUT=1.2 V

RLOAD > 5 , to VOUT=1.8 V

210 250 s

340 420 s

10

V/ms

© 2009 Fairchild Semiconductor Corporation

FAN5354 • Rev. 1.0.7

4

www.fairchildsemi.com

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