Diodes AP2138/2139 User Manual
General description, Features, Applications

ULTRA LOW QUIESCENT CURRENT CMOS LDO AP2138/2139
Data Sheet
1
Jul. 2012 Rev. 2. 3
BCD Semiconductor Manufacturing Limited
Figure 1. Package Types of AP2138/2139
SOT-23-3
General Description
The AP2138/2139 series are CMOS-based positive
voltage regulator ICs. Each of these ICs consists of a
voltage reference, an error amplifier, a resistor network
for setting output voltage and a current limit circuit for
current protection.
The difference between AP2138 and AP2139 is the
AP2139 has an enable circuit with a quick discharge
function.
These ICs feature high output voltage accuracy,
extremely low quiescent current and low dropout volt-
age which make them ideal for use in various power
sources for portable applications.
The AP2138/2139 series have 1.2V,
1.4V, 1.5V, 1.8V,
2.5V, 2.8V, 3.0V, 3.3V, 3.6V and 4.0V fixed output
voltage versions.
The AP2138 series is available in SOT-23-3 and SOT-
89
packages, AP2139 series is available in SOT-23-5
package.
Features
·
Ultra-low Quiescent Current: 1.0
μA Typical
·
Output Voltages: 1.2V, 1.4V, 1.5V, 1.8V, 2.5V,
2.8V, 3.0V, 3.3V, 3.6V and 4.0V
·
High Output Voltage Accuracy:
±2%
·
Output Current: 250mA
·
Low Dropout Voltage:
25mV Typical at I
OUT
=10mA and V
OUT
=3V
200mV Typical at I
OUT
=100mA and V
OUT
=3V
·
Line Regulation: 6mV Typical
·
Load Regulation: 25mV Typical
·
Low Output Voltage Temperature Coefficient:
±100ppm/
o
C
·
Low Standby Current: 0.1
μA Typical (AP2139)
·
Active Quick Output Discharge (AP2139)
·
Logic-controlled Enable (AP2139)
Applications
·
Battery Powered Equipment
·
Reference Voltage Sources
·
Cameras, Video Cameras
·
Portable AV Systems
·
Mobile Phones
·
Communication Tools
·
Portable Games
SOT-23-5
SOT-89