Diodes AP2121 - Manual

Data Sheet
1
Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121
General Description
The AP2121 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
(5-pin products only).
The AP2121 series feature high supply voltage ripple
rejection, low dropout voltage, low noise, high output
voltage accuracy, and low current consumption which
make them ideal for use in various battery-powered
devices.
The AP2121 series have 1.2V, 1.3V, 1.5V, 1.8V, 2.5V,
2.8V, 2.85V, 3.0V, 3.2V and 3.3V versions.
The AP2121 are available in standard SOT-23-3, SOT-
23-5 and CSP-4 packages.
Features
· Low Dropout Voltage at I
OUT
=100mA: 150mV
Typical (Except 1.2V, 1.3V and 1.5V Versions)
· Low Standby Current: 0.1 μA Typical
· Low Quiescent Current: 25 μA Typical
· High Ripple Rejection: 70dB Typical （f=1kHz）
· Output Current: More Than 200mA (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 Transient Response and Load
Transient Response
· Compatible with Low ESR Ceramic Capacitor (as
Low as 1
μF)
Applications
· Mobile Phones, Cordless Phones
· Wireless Communication Equipment
· Portable Games
· Cameras, Video Recorders
· Sub-board Power Supplies for Telecom Equip-
ment
· Battery Powered Equipment
Figure 1. Package Types of AP2121
SOT-23-5 SOT-23-3 CSP-4