AT1799

2A Step-Down Voltage Regulator

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Electrical Characteristics

(IN=12V, EN=5V, Ta=+25℃, unless otherwise noted)

Parameter

Symbol

Test Condition

Min.

Typ.

Max. Units

Input operating voltage

IN

4.75

12

16

V

Input under-voltage lockout

threshold

IN Rising

3.8

4.2

4.6

V

UVLO hysteresis

-

500

-

mV

Quiescent Current

Iin

-

3.5

-

mA

Shutdown Current

EN =GND

-

20

50

uA

Oscillator Frequency

Ta=+25℃

-

380

440

KHz

Short-Circuit Frequency

FB=0V

-

42

-

KHz

Feedback Regulation voltage

Ta=+25℃

1.20

1.215 1.233

V

FB Input Bias Current

-50

-

50

nA

Current limit

2.5

2.75

-

A

Maximum Duty Cycle

FB=1.0V

-

-

100

%

Minimum Duty Cycle

FB=1.5V

0

-

-

%

SW Switch On-Resistance

-

100

130

mΩ

SW Leakage Current

, EN=0V

-

0.1

20

µA

Load Regulation

0.2

%

Line Regulation

4.75V < IN<16V

-

1.0

-

%/V

Error Amplifier Voltage Gain

-

70

-

dB

Error Amplifier Trans-conductance

500

800

1000

µA/V

Soft-Start Time

-

10

-

ms

EN Threshold Voltage

Hysteresis 150mV

-

1

-

V

EN Pull Up Current

EN=0V

-

1

-

µA

Thermal Shutdown

-

160

-

℃

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW:

http://www.aimtron.com.tw

8/23/2006

REV:1.1

Email:

service@aimtron.com.tw

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