ACT4072SH-T 查看數據表（PDF） - Active-Semi, Inc

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ACT4072SH-T

Wide Input 2A Step Down Converter

Active-Semi, Inc 

Active-Semi

ACT4072

Rev2, 27-May-08

ABSOLUTE MAXIMUM RATINGSc

PARAMETER

VALUE

UNIT

IN to G

-0.3 to +34

V

EN to G

SW to G

BS to SW

-0.3 to VIN + 0.3

V

-1 to VIN + 1

V

-0.3 to +8

V

FB, COMP to G

-0.3 to +6

V

Continuous SW Current

Internally limited

A

Junction to Ambient Thermal Resistance (θJA)

Maximum Power Dissipation

105

°C/W

0.76

W

Operating Junction Temperature

-40 to 150

°C

Storage Temperature

-55 to 150

°C

Lead Temperature (Soldering, 10 sec)

300

°C

Ambient Operating Temperature

-40 to 85

°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

SYMBOL TEST CONDITIONS

Input Voltage

Feedback Voltage

VIN

VFB

VIN = 12V

High-Side Switch On Resistance

RONH

Low-Side Switch On Resistance

RONL

SW Leakage

VEN = 0

Current Limit

ILIM

COMP to Current Limit Transconductance GCOMP

Error Amplifier Transconductance

GEA

∆ICOMP = ±10µA

Error Amplifier DC Gain

AVEA

Switching Frequency

fSW

Short Circuit Switching Frequency

VFB = 0

Maximum Duty Cycle

DMAX

VFB = 1.1V, PWM mode

Minimum Duty Cycle

Enable Threshold Voltage

DMIN

VFB = 1.4V, PFM mode

Hysteresis = 0.1V

Enable Pull Up Current

Supply Current in Shutdown

IC Supply Current in Operation

Thermal Shutdown Temperature

VEN = 0

VEN = 3V, not switching

Hysteresis = 10°C

MIN

4.5

1.198

2.4

340

0.7

TYP MAX UNIT

30

V

1.222 1.246 V

0.13

Ω

10

Ω

0

10 µA

3.3

A

2

A/V

550

µA/V

4000

V/V

420 500 kHz

60

kHz

88

%

0

%

1

1.3

V

2

µA

6

20 µA

0.8

2

mA

160

°C

Innovative PowerTM

-3-

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

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