Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2126
General Description
The AP2126 is a 300mA, positive Voltage regulator
ICs fabricated by CMOS process.
Each of AP2126 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
OSTD (over temperature shut down) circuit to prevent
the IC from over current and over temperature.
The AP2126 has features of high ripple rejection, low
dropout voltage, low noise, high output voltage
accuracy, and low current consumption which make it
ideal for use in various battery-powered apparatus.
AP2126 has 3.3V fixed voltage version. It is available
in SOT-23-5 Package.
Features
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Low Dropout Voltage: 170mV@300mA
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 AP2126
Jun. 2008 Rev. 1.1
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
