Diodes AP2128 - Manual

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2128
Data Sheet
1
Sept. 2010 Rev. 2.0 BCD Semiconductor Manufacturing Limited
Figure 1. Package Type of AP2128
SOT-23-5
General Description
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 have 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.
Features
· 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: 0.1 µA
· Low Quiescent Current: 60 µA Typical
· Low Output Noise: 60 µVrms@V
OUT
=0.8V
· Short Current Limit: 50mA
· Over Temperature Protection
· Compatible with Low ESR Ceramic Capacitor:
1
µF for C
IN
and C
OUT
· Excellent Line/Load Regulation
· Soft Start Time: 50 µs
· Auto Discharge Resistance: R
DS(ON)
=60 Ω
Applications
· Datacom
· Notebook Computers
· Mother Board