Preliminary Datasheet
150mA RF ULDO REGULATOR WITH ERROR FLAG
AP2203
General Description
Features
The AP2203 is a 150mA ULDO regulator, which pro-
vides ultra low dropout voltage (typically 165mV at
150mA), very low quiescent current (1µA maximum)
in shutdown mode and excellent power supply ripple
rejection (PSRR 75dB at 100Hz) in battery powered
applications, such as handsets and PDAs and in noise
sensitive applications, such as RF electronics.
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Error Flag to Indicate Undervoltage Fault
Up to 150mA Regulator Output
Low Quiescent Current
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Low Dropout Voltage: V
=165mV at 150mA
DROP
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High Output Accuracy: ±1%
Good Ripple Rejection Ability: 75dB at 100Hz
and I =100µA
OUT
The AP2203 also features an undervoltage monitor
with an error flag output, logic compatible enable/shut-
down control inputs, a low power shutdown mode for
extended battery life, over current protection, over
temperature protection as well as reversed-battery pro-
tection.
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Tight Load and Line Regulation
Low Temperature Coefficient
Over Current Protection
Thermal Protection
Reverse-battery Protection
Zero Off-mode Current
Logic-controlled Enable
The AP2203 has 2.5V, 3.0V and 3.3V versions.
The AP2203 is available in space saving 5-pin SOT-
23-5 package.
Applications
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Cellular Phones
Cordless Phones
Wireless Communicators
PDAs / Palmtops
Consumer Electronics
SOT-23-5
Figure 1. Package Type of AP2203
Mar. 2006 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1