AP3423 datasheet(5/10 Pages) BCDSEMI

Part #	AP3423

Description	1.2A, 1.4MHz, Dual Synchronous DC-DC Buck Converter

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Manufacturer	BCDSEMI [BCD Semiconductor Manufacturing Limited]

Direct Link	http://www.bcdsemi.com

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5 / 10 page

Data Sheet

1.2A, 1.4MHz, Dual Synchronous DC-DC Buck Converter

AP3423

Oct. 2011 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

5

Electrical Characteristics

VIN=3.3V, VOUT=2.5V, TA=25ºC, unless otherwise specified.

Parameters

Symbol

Conditions

Min

Typ

Max

Unit

CHANNEL 1 and CHANNEL 2

Input Voltage

VIN

2.5

5.5

V

Quiescent Current

IQ

VFB=0.65V

62

100

µA

Shutdown

Supply

Current

ISTBY

VEN=GND

0.1

1

µA

Reference Voltage

VREF

For Adjustable

Output Voltage

0.588

0.6

0.612

V

Feedback Bias Current

IFB

VFB=VIN

-0.1

+0.1

µA

Output

Voltage

Accuracy

∆VOUT

-2

+2

%

PMOSFET RON

RDS(ON)_P

ISW =200mA

0.28

Ω

NMOSFET RON

RDS(ON)_N

ISW =-200mA

0.25

Ω

Switch Current Limit

ILIM

VFB=0.55V

1.5

2.0

A

VH

1.5

EN Pin Threshold

VL

0.4

V

UVLO Threshold

VUVLO

VIN Rising

2.3

UVLO Hysteresis

VHYS

0.2

V

Oscillator Frequency

fOSC

1.12

1.4

1.68

MHz

Max. Duty Cycle

DMAX

VFB=0V

100

Min. Duty Cycle

DMIN

VFB=6.5V

0

%

SW Leakage Current ,

N-MOS

VIN=VSW=3.3V

0.1

µA

Soft-start Time

t

1

ms

Thermal Shutdown

TOTSD

160

ºC

Thermal

Shutdown

Hysteresis

THYS

20

ºC

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