Diodes AP2122 - Manual

Data Sheet
1
May. 2010 Rev. 1. 5 BCD Semiconductor Manufacturing Limited
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2122
General Description
The AP2122 series are positive voltage regulator ICs
fabricated by CMOS process. Each of these ICs con-
sists of a voltage reference, an error amplifier, a resis-
tor network for setting output voltage, a current limit
circuit for current protection and a chip enable circuit .
The AP2122 series feature high ripple rejection, low
dropout voltage, low noise, high output voltage accu-
racy, and low current consumption which make them
ideal for use in various battery-powered devices.
The AP2122 series have 1.5V, 1.8V, 2.5V, 2.8V, 3.0V,
3.2V and 3.3V versions.
The AP2122 are available in standard SOT-23-5 pack-
age.
Features
· Low Dropout Voltage at I
OUT
=100mA: 150mV
Typical (Except 1.5V Version)
· Low Standby Current: 0.1 µA Typical
· Low Quiescent Current: 25 µA Typical
· High Ripple Rejection: 70dB Typical（f=10kHz）
· Maximum Output Current: More Than 150mA
(300mA Limit)
· Extremely Low Noise: 30 µVrms (10Hz to
100kHz)
· Excellent Line Regulation: 4mV Typical
· Excellent Load Regulation: 12mV Typical
· High Output Voltage Accuracy: ±2%
· Excellent Line and Load Transient Response
· Compatible with Low ESR Ceramic Capacitor (as
Low as 1
µF)
Applications
· Mobile Phones, Cordless Phones
· MP3/4
· Portable Electronic Devices
· Cameras, Video Recorders
· Sub-board Power Supplies for Telecom Equip-
ment
· Battery Powered Equipment
Figure 1. Package Type of AP2122
SOT-23-5