Preliminary Datasheet
ULTRA LOW QUIESCENT CURRENT CMOS LDO
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 and 3.3V fixed output voltage ver-
sions.
The AP2138 series is available in SOT-23-3 and SOT-
89 packages, AP2139 series is available in SOT-23-5
package.
AP2138/2139
Features
·
·
·
·
·
Ultra-low Quiescent Current: 1.0µA Typical
Output Voltages: 1.2V, 1.4V, 1.5V, 1.8V, 2.5V,
2.8V, 3.0V and 3.3V
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: 0.1µA 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-23-3
SOT-23-5
SOT-89
Figure 1. Package Types of AP2138/2139
Jul. 2011 Rev. 2. 0
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
