AP1116

0.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

Anachip Corp.

www.anachip.com.tw

Rev. 1.0 Aug.27, 2004

2/5

Connection Diagram

Adj (GND)

3 PIN SOT89

Vout

Vin

1

3

2

Tab is Vout

Pin Descriptions

NAME

I/O

PIN #

FUNCTION

Adj (GND)

I

1

A resistor divider from this pin to the Vout pin and ground sets the

output voltage. (Ground only for Fixed-Mode)

Vout

O

2

The output of the regulator. A minimum of 10uF capacitor (0.15Ω

≤ ESR ≤ 20Ω) must be connected from this pin to ground to insure

stability.

Vin

I

3

The input pin of regulator. Typically a large storage capacitor

(0.15Ω ≤ ESR ≤ 20Ω) is connected from this pin to ground to

insure that the input voltage does not sag below the minimum

dropout voltage during the load transient response. This pin must

always be 1.3V higher than Vout in order for the device to

regulate properly.

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

DC Supply Voltage

-0.3 to 18 V

V

Power Dissipation

Internally Limited

Storage Temperature

-65 to +150

Operating Junction Temperature Range

0 to +150