ACT4075YH-T 查看數據表（PDF） - Active-Semi, Inc

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ACT4075YH-T

Wide Input 2.5A Step Down Converter

Active-Semi, Inc 

ACT4075

Rev PrA, 13-Aug-07

ABSOLUTE MAXIMUM RATINGS

PARAMETER

IN to G

EN to G

SW to G

BS to SW

FB, COMP to G

Continuous SW Current

Junction to Ambient Thermal Resistance (θJA)

Maximum Power Dissipation

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10 sec)

VALUE

-0.3 to +34

-0.3 to VIN + 0.3

-1 to VIN + 1

-0.3 to +8

-0.3 to 6

Internally limited

46

1.8

-40 to 150

-55 to 150

300

UNIT

V

V

V

V

V

A

°C/W

W

°C

°C

°C

: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may

affect device reliability.

ELECTRICAL CHARACTERISTICS

(VIN = 12V, TA= 25°C, unless otherwise specified.)

PARAMETER

Input Voltage

Feedback Voltage

High-Side Switch On Resistance

Low-Side Switch On Resistance

SW Leakage

Current Limit

COMP to Current Limit Transcon-

ductance

Error Amplifier Transconductance

Error Amplifier DC Gain

Switching Frequency

Short Circuit Switching Frequency

Maximum Duty Cycle

Minimum Duty Cycle

Enable Threshold Voltage

Enable Pull Up Current

Supply Current in Shutdown

IC Supply Current in Operation

Thermal Shutdown Temperature

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

VIN

VFB

RONH

RONL

ILIM

VOUT = 2.5V, ILOAD = 0A to 2.5A

VEN = 0, VIN = 12V, VSW = 0V

4.5

32 V

1.198 1.222 1.246 V

100

mΩ

10

Ω

0

10 µA

3.5 5

A

GCOMP

ΔILOAD/ΔICOMP

3

A/V

GEA

AVEA

fSW

DMAX

ΔICOMP = ±10µA

550

µA/V

4000

V/V

340 410 490 kHz

VFB = 0V

VFB = 1.1V, PWM mode

40

kHz

90

%

VFB = 1.4V, PFM mode

0

%

Hysteresis = 0.1V

0.7 1 1.3 V

Pin pulled up to VIN when left uncon-

nected

2

µA

VEN = 0

6

20 µA

VEN = 3V, not switching

0.85 2 mA

Hysteresis = 10°C

160

°C

Innovative Products. Active Solutions.

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www.active-semi.com

Copyright © 2007 Active-Semi, Inc.

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