Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2129
General Description
The AP2129 is a 300mA, positive Voltage regulator
ICs fabricated by CMOS process. The AP2129
provides two kinds of output voltage operation modes
for setting the output voltage. Fixed output voltage
mode senses the output voltage on V
OUT
, adjustable
output voltage mode needs two resistors as a voltage
divider
The AP2129 Series have features of low dropout
voltage, low noise, high output voltage accuracy, and
low current consumption which make them ideal for
use in various battery-powered devices.
AP2129 has 1.0V, 1.2V, 3.3V fixed voltage version and
0.8V to 4.5V adjustable voltage version.
AP2129 series are available in SOT-23-5 Package.
Features
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Wide Operating Voltage: 1.8V to 6V
High Output Voltage Accuracy:
±2%
High Ripple Rejection:
65dB@ f=1kHz, 45dB@ f=10kHz
Low Standby Current: 0.1µA
Low Quiescent Current: 60µA Typical
Low Output Noise: 60µVrms
Short Current Limit: 50mA
Over Temperature Protection
Compatible with Low ESR Ceramic Capacitor:
1µF for C
IN
and C
OUT
Excellent Line/Load Regulation
Soft Start Time
: 50µs
Auto Discharge Resistance: R
DS(ON)
=60Ω
Applications
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Datacom
Notebook Computers
Mother Board
SOT-23-5
Figure 1. Package Type of AP2129
Oct. 2009 Rev. 1.1
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
