AP2125 Datasheet, PDF (1/27 Pages) BCD Semiconductor Manufacturing Limited – 300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR

Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
General Description
Features
AP2125
The AP2125 series are 300mA, positive voltage regu-
lator ICs fabricated by CMOS process.
Each of these ICs is equipped with a voltage reference,
an error amplifier, a resistor network for setting output
voltage, a chip enable circuit, a current limit circuit and
OTSD (over temperature shut down) circuit to prevent
the IC from over current and over temperature.
The AP2125 series have features of high ripple rejec-
tion, low dropout voltage, low noise, high output volt-
age accuracy and low current consumption which
make them ideal for use in various battery-powered
apparatus.
· Excellent Ripple Rejection: 70dB Typical (1.8V
Version)
· Low Dropout Voltage: 65mV (I_OUT=100mA,
3.3V Version)
· Low Standby Current: 0.01µA Typical
· Low Quiescent Current: 60µA Typical
· Extremely Low Noise: 50µVrms Typical
· Maximum Output Current: 300mA (Min.)
· High Output Voltage Accuracy: ±2%
· Compatible with Low ESR Ceramic Capacitor
· Excellent Line/Load Regulation
Applications
The AP2125 have 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.15V
and 4.2V fixed voltage versions.
· CDMA/GSM Cellular Handsets
· Battery-powered Equipments
These ICs are available in tiny SC-70-5 and SC-82 · Laptops, Palmtops, Notebook Computers
packages as well as industry standard SOT-23-3 and _{· Hand-held Instruments}
SOT-23-5 packages.
· PCMCIA Cards
· Portable Information Appliances
SOT-23-3
May. 2010 Rev. 1. 4
SOT-23-5
SC-70-5
SC-82
Figure 1. Package Types of AP2125
BCD Semiconductor Manufacturing Limited
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