ACT4012A

Rev0, 16-May-08

Innovative Power

TM

- 3 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

VALUE

UNIT

IN to G

-0.3 to 25

V

SW to G

V

BS to G

V

FB, COMP to G

-0.3 to 6

V

Continuous SW Current

Internally Limited

A

105

°C/W

Maximum Power Dissipation

0.76

W

Operating Junction Temperature

-40 to 150

°C

Storage Temperature

-55 to 150

°C

Lead Temperature (Soldering, 10 sec)

300

°C

EN to G

V

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Voltage

7.5

20

V

Feedback Voltage

1.261

1.293

1.325

V

High-Side Switch On Resistance

0.5

Ω

Low-Side Switch On Resistance

13.5

Ω

SW Leakage

0

10

µA

Current Limit

1.8

2.7

A

COMP to Current Limit

Transconductance

1.5

A/V

Error Amplifier Transconductance

565

µA/V

Error Amplifier DC Gain

4000

V/V

Switching Frequency

310

420

530

kHz

Short Circuit Switching Frequency

50

kHz

Maximum Duty Cycle

90

%

Minimum Duty Cycle

14

%

Enable Threshold Voltage

Hysteresis = 0.1V

0.7

1

1.3

V

Enable Pull-Up Current

Pin pulled up to IN when left

unconnected

2

µA

Supply Current in Shutdown

10

20

µA

IC Supply Current in Operation

0.85

mA

Thermal Shutdown Temperature

Hysteresis = 10°C

160

°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.