ACT4523

Rev 4, 21-Jul-11

Active-Semi

Innovative Power

TM

- 4 -

www.active-semi.com

Copyright © 2011 Active-Semi, Inc.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Voltage

10

38

V

Input Voltage Rising

9.0

9.4

9.7

V

Input Voltage Falling

1.1

V

0.9

1.4

mA

3.0

mA

Shutdown Supply Current

75

115

µA

Feedback Voltage

792

808

824

mV

Internal Soft-Start Time

400

µs

Error Amplifier Transconductance

650

µA/V

Error Amplifier DC Gain

4000

V/V

Switching Frequency

200

225

250

kHz

Foldback Switching Frequency

30

kHz

Maximum Duty Cycle

85

88

91

%

Minimum On-Time

200

ns

COMP to Current Limit Transconductance

5.25

A/V

Secondary Cycle-by-Cycle Current Limit

4.5

A

Slope Compensation

1.2

A

ISET Voltage

1

V

ISET to IOUT DC Room Temp Current Gain

25000

A/A

CC Controller DC Accuracy

Open-Loop DC Test

1175

1190

1205

mA

EN Threshold Voltage

EN Pin Rising

1.47

1.6

1.73

V

EN Hysteresis

EN Pin Falling

125

mV

EN Internal Pull-up Current

4

µA

High-Side Switch ON-Resistance

0.16

Ω

SW Off Leakage Current

1

10

µA

Thermal Shutdown Temperature

Temperature Rising

150

°C

Standby Supply Current

Thermal Shutdown Temperature Hysteresis Temperature Falling

20

°C

Input Voltage Surge

40

V

ELECTRICAL CHARACTERISTICS