AP2128_09 Datasheet, PDF (1/21 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
AP2128
The AP2128 Series are positive voltage regulator ICs
fabricated by CMOS process. The AP2128 provides
two kinds of output voltage operation modes for
setting the output voltage. Fixed output voltage mode
senses the output voltage on V_OUT, adjustable output
voltage mode needs two resistors as a voltage divider
The AP2128 Series have features of low dropout
voltage, low noise, high output voltage accuracy, and
low current consumption which make them ideal for
use in various battery-powered devices.
AP2128 has 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V,
3.3V, 3.9V, 4.2V, 4.75V, 5.2V fixed voltage versions
and 0.8V to 5.5V adjustable voltage version.
AP2128 series are available in SOT-23-5 Package.
· Wide Operating Voltage: 2.5V to 6V
· Low Dropout Voltage:170mV@300mA for
V_OUT=3.3V, 140mV@300mA for V_OUT=5.2V
· High Output Voltage Accuracy: ±2%
· High Ripple Rejection:
68dB@ f=1kHz, 54dB@ f=10kHz
· Low Standby Current: 0.1µA
· Low Quiescent Current: 60µA Typical
· Low Output Noise: 60µVrms@V_OUT=0.8V
· 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
· Datacom
· Notebook Computers
· Mother Board
Oct. 2009 Rev. 1.8
SOT-23-5
Figure 1. Package Type of AP2128
BCD Semiconductor Manufacturing Limited
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