AP139
300mA Low-Noise CMOS LDO


This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Jun 02, 2006
1/8
„ Features

- Very low dropout voltage
- Low current consumption: Typ.45µA, Max. 60µA
- Output voltage: 1.5V,1.8V,2.0V, 2.5V, 2.8V, 3.0V
3.3V, and 3.5V
- Guaranteed 300mA output
- Input range up to 7.0V
- Thermal shutdown
- Current limiting
- Stability with low ESR capacitors
- Low temperature coefficient
- Pb-free package: SOT23-5L,TSOT23-5L


„ Applications

- Battery-powered devices
- Personal communication devices
- Home electric/electronic appliances
- PC peripherals
„ General Descriptions

The AP139 is a positive voltage linear regulator
utilizing CMOS technology. The features that
include low quiescent current (45µA typ.), low
dropout voltage, and high output voltage accuracy,
make it ideal for battery applications. EN input
connected to CMOS has low bias current. The
space-saving SOT23-5L and TSOT23-5L package
is attractive for “Pocket” and “Hand Held”
applications.

This rugged device has both thermal shutdown, and
current limit protections to prevent device failure
under the “Worst” operating conditions.

In a low noise, regulated supply application, a 10nF
capacitor is necessary to be placed in between
Bypass and Ground.

The AP139 is stable with a low ESR output
capacitor of 1.0µF or greater.

„ Pin Assignments
1 32
5 4
BYP
V
IN
ENGND
V
OUT
AP139
SOT23-5/TSOT23-5
(Top View)

„ Pin Descriptions

Pin
Name
Pin
No.
Function
V
IN
1 Power Supply
GND 2 Ground
EN 3 Enable Pin
BYP 4 Bypass Signal Pin
V
OUT
5 Output



„ Ordering Information
AP139 XX X X
W : SOT23-5L
TW:TSOT23-5L
Output voltage Package
15: 1.5V
18: 1.8V
20: 2.0V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
35: 3.5V
Blank: Tube
A: Taping
Packing