Data Sheet
DUAL LDO REGULATORS
General Description
The AP2401 series are dual positive voltage regulator
ICs fabricated by CMOS process. Each of these ICs
consists of a voltage reference, two error amplifiers,
two resistor networks for setting output voltages. Each
channel has a current limit circuit for current protec-
tion.
The AP2401 series feature high ripple rejection, low
dropout voltage, low noise, high output voltage accu-
racy, and low current consumption which make them
ideal for use in various battery-powered devices. The
chip enable function allows the output of each channel
to be turned on/off independently, greatly reducing the
power consumption.
The AP2401 series have 1.8V/2.5V, 1.8V/2.8V, 1.8V/
3.3V and 2.8V/1.8V versions.
The AP2401 are available in standard SOT-23-6 pack-
age.
AP2401
Features
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Maximum Output Current/Channel: More Than
150mA (300mA Limit)
High Output Voltage Accuracy:
±2%
Low Quiescent Current/Channel: 25µA Typical
Low Standby Current: 0.1µA Typical
High PSRR: 70dB Typical
（f=1kHz)
Extremely Low Noise: 30µVrms (10Hz to
100kHz)
Operating Temperature: -40 to 85
o
C
Compatible with Low ESR Ceramic Capacitor
Applications
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Mobile Phones, Cordless Phones
Wireless Communication Equipment
Portable Games
Cameras, Video Recorders
Sub-board Power Supplies for Telecom Equip-
ment
Battery Powered Equipment
SOT-23-6
Figure 1. Package Type of AP2401
Oct. 2009 Rev. 1. 4
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
