APW7057(2008) 데이터 시트보기 (PDF) - Anpec Electronics

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APW7057
(Rev.:2008)

High Power Step-Down Synchronous DC/DC Controller

Anpec Electronics 

APW7057

Electrical Characteristics

Unless otherwise specified, these specifications apply over VCC=5V, VBOOT=12V and TA= 0~70 oC. Typical values are

at T =25oC.

A

Symbol

Parameter

Test Conditions

APW7057

Unit

Min. Typ. Max.

SUPPLY CURRENT

IVCC VCC Nominal Supply Current

UGATE and LGATE Open

-

2.1

-

mA

IBOOT BOOT Nominal Supply Current

UNDER VOLTAGE LOCKOUT (UVLO)

UGATE Open

-

2.1

-

mA

Rising VCC Threshold

4.0

4.2

4.4

V

Falling VCC Threshold

3.8

4.0

4.2

V

OSCILLATOR

FOSC

Free Running Frequency

Ramp Upper Threshold

250 300 340 kHz

-

2.85

-

V

Ramp Lower Threshold

-

0.95

-

V

∆VOSC Ramp Amplitude

REFERENCE VOLTAGE

-

1.9

-

VP-P

VREF Reference Voltage

Reference Voltage Accuracy

-

0.8

-

V

-1.5

-

+1.5

%

ERROR AMPLIFIER

DC Gain

-

75

-

dB

FP

First Pole Frequency

-

10

-

Hz

FZ

First Zero Frequency

UGATE Duty Range

-

1

-

kHz

0

-

100

%

FB Input Current

-

-

0.1

µA

PWM CONTROLLER GATE DRIVERS

UGATE Source

VUAGTE=1V

-

0.6

-

A

UGATE Sink

VUGATE=1V

-

7.3

-

Ω

LGATE Source

VLGATE=1V

-

0.6

-

A

LGATE Sink

VLGATE=1V

-

1.8

-

Ω

TD

Dead Time

PROTECTION

-

50

-

nS

IOCSET

UVFB

OCSET Sink Current

FB Under-Voltage Level

VOCSET=4.5V

FB falling

34

40

46

µA

-

0.5

-

V

FB Under-Voltage Hysteresis

-

15

-

mV

Copyright © ANPEC Electronics Corp.

3

Rev. A.5 - Jun., 2008

www.anpec.com.tw

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