AP3211H datasheet(5/11 Pages) BCDSEMI

Part #	AP3211H

Description	1.4MHz, 1.5A ASYNCHRONOUS 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 / 11 page

Preliminary Datasheet

1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER

AP3211H

Aug. 2012 Rev. 1. 0

BCD Semiconductor Manufacturing Limited

5

Electrical Characteristics

VIN=VEN=12V, VOUT=3.3V, TA=25ºC, unless otherwise specified.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Voltage

VIN

4.5

23

V

Quiescent Current

IQ

VFB=0.9V

0.8

1.1

mA

Shutdown Supply Current

ISHDN

VEN=0V

0.1

1.0

µA

Feedback Voltage

VFB

0.785

0.810

0.835

V

Feedback Over Voltage Threshold

VFBOV

0.972

V

Feedback Bias Current

IFB

VFB=0.85V

-0.1

0.1

µA

Switch On-resistance

RDSON

ISW=1A

0.385

Ω

Switch Leakage Current

ILEAK

VIN=23V,

VEN=0V

0.1

10

µA

Switch Current Limit

ILIM

1.8

2.4

A

EN Pin Threshold

VENH

1.5

V

VENL

0.4

Input UVLO Threshold

VUVLO

VIN Rising

3.3

3.8

4.3

V

Input UVLO Hysteresis

VHYS

0.2

V

Oscillator Frequency

fOSC1

1.1

1.4

1.7

MHz

fOSC2

Short Circuit

460

kHz

Max. Duty Cycle

DMAX

VFB=0.6V

90

%

Min. Duty Cycle

DMIN

VFB=0.9V

0

%

Minimum On Time

tON

100

ns

Thermal Shutdown

TOTSD

160

ºC

Thermal Shutdown Hysteresis

THYS

20

ºC

Soft-start Time

tSS

200

µs

Note 2: RDSON , tON, TOTSD, THYS and tSS are guaranteed by design.

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