AP3436A datasheet(6/15 Pages) BCDSEMI

Part #	AP3436A

Description	3A, 1.25MHz High Performance Synchronous Buck Converter

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Manufacturer	BCDSEMI [BCD Semiconductor Manufacturing Limited]

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Data Sheet

3A, 1.25MHz High Performance Synchronous Buck Converter

AP3436/A

Jan. 2013 Rev. 1.2

BCD Semiconductor Manufacturing Limited

6

Electrical Characteristics (Continued)

VCC=5V, VIN=5V, TA=25°C, unless otherwise specified.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

ENABLE (EN PIN)

EN Pin Threshold

VEN_L

0.8

V

VEN_H

1.6

V

POWER GOOD (PGOOD PIN)

Feedback Threshold

VFBTH

VFB falling (Fault)

70

75

%VREF

VFB rising (Good)

77

82

VFB rising (Fault)

125

130

VFB falling (Good)

118

123

Delay

Time

for

PGOOD from High to

Low

tPG_DLY

30

µs

Internal Power Good

Pull Low Resistance

RPG

150

Ω

External

Pull-up

Resistance Range

RPG_UP

3000

Ω

SYSTEM PERFORMANCE

Output Under Voltage

Protection Threshold

VUVP

VIN=1.3 to 5.5V

0.5×

VOUT

V

Delay Time for UVP

Triggered

tUVP

VIN=1.5 to 5V

65

µs

Output Over Voltage

Protection Threshold

VOVP

VIN=1.3 to 5.5V

1.5×

VOUT

V

Delay Time for OVP

Triggered

tOVP

VIN=1.5 to 5V

65

µs

Output Current

IOUT

VIN=1.5 to 5V,

VOUT=1.0V

3

A

Output Voltage Line

Regulation

VIN=1.5 to 5V,

IOUT=100mA

0.4

%×

VOUT/V

Output Voltage Load

Regulation

IOUT=0A to 3A

0.3

%×

VOUT/A

Output Voltage Load

Transient

VTRAN

VIN=5V, VOUT=1.0V,

dI/dt=400mA/

µs

±

2.5

%×

VOUT/A

Efficiency

η

VCC=5V, VIN=5V,

IOUT=3A, VOUT=1.2V

80

%

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