AP2121_07 Datasheet, PDF (1/21 Pages) BCD Semiconductor Manufacturing Limited – HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR

Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
General Description
Features
The AP2121 series are positive voltage regulator ICs _{· Low Dropout Voltage at IOUT=100mA: 150mV}
fabricated by CMOS process. Each of these ICs con-
Typical (Except 1.5V Version)
sists of a voltage reference, an error amplifier, a resis- _{· Low Standby Current: 0.1µA Typical}
tor network for setting output voltage, a current limit
circuit for current protection and a chip enable circuit
(5-pin products only).
·
·
Low Quiescent Current: 25µA Typical
High Ripple Rejection: 70dB Typicalčf=10kHzĎ
· Maximum Output Current: More Than 150mA
The AP2121 series feature high ripple rejection, low
(300mA Limit)
dropout voltage, low noise, high output voltage accu- ^{· Extremely Low Noise: 30µVrms (10Hz to}
racy, and low current consumption which make them
100kHz)
ideal for use in various battery-powered devices.
· Excellent Line Regulation: 4mV Typical
· Excellent Load Regulation: 12mV Typical
The AP2121 series have 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, _{· High Output Voltage Accuracy: ±2%}
3.2V and 3.3V versions.
· Excellent Line Transient Response and Load
Transient Response
The AP2121 are available in standard SOT-23-3 and _{· Compatible with Low ESR Ceramic Capacitor (as}
SOT-23-5 packages.
Low as 1µF)
Applications
· Mobile Phones, Cordless Phones
· Wireless Communication Equipment
· Portable Games
· Cameras, Video Recorders
· Sub-board Power Supplies for Telecom Equip-
ment
· Battery Powered Equipment
Mar. 2007 Rev. 1. 4
SOT-23-3
SOT-23-5
Figure 1. Package Types of AP2121
BCD Semiconductor Manufacturing Limited
1