AP1117

1A LOW DROPOUT POSITIVE ADJUSTABLE OR

FIXED-MODE REGULATOR

AP1117 Rev. 19

3 of 12

JANUARY 2010

DS31009

www.diodes.com

(1) SOT89-3L

(2) SOT223-3L

Adj (GND)

1

3

2

( Top View )

Adj (GND)

( Top View )

3

2

1

(3) TO220-3L

(4) TO252-3L and TO263-3L

3

2

1

Adj (GND)

( Front View )

3

2

1

( Top View )

Adj (GND)

Pin Name

I/O

PIN #

Description

Adj (GND)

I

1

voltage (Ground only for Fixed-Mode).

O

2

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

Ω ≤ ESR ≤

20

Ω) must be connected from this pin to ground to insure stability.

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

properly.

Pin Assignments

Pin Descriptions