1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

AP1086

Anachip Corp.

www.anachip.com.tw

Rev.1.3 Jun. 8, 2005

2/9

Block Diagram

3

THERMAL

SHUTDOWN

1

2

Vout

Adj

(GND)

1.25V

+

+

CURRENT

LIMIT

Vin

+

－

+

Connection Diagram

3 PIN TO263

3 PIN TO252

3 PIN TO220

3

2

1

Vin

Vout

Tab is Vout

FRONT VIEW

Adj

(GND)

3

2

1

Vin

Vout

Adj

(GND)

Tab is Vout

FRONT VIEW

Tab is Vout

3

Vin

2

1

Vout

FRONT VIEW

Adj

(GND)

Pin Descriptions

NAME

I/O

PIN #

FUNCTION

Adj

(GND)

1

Adjustable (Ground only for fixed mode)

Vout

O

2

The output of the regulator. A minimum of 10uF capacitor must be

connected from this pin to ground to insure stability.

Vin

I

3

The input pin of regulator. Typically a large storage capacitor 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 1.4V higher than Vout in order for

the device to regulate properly.