AP2202 Datasheet, PDF (1/13 Pages) BCD Semiconductor Manufacturing Limited – 150mA RF ULDO REGULATOR

Preliminary Datasheet
150mA RF ULDO REGULATOR
General Description
Features
AP2202
The AP2202 is a 150mA ULDO regulator which pro-
vides very low noise (45µVrms at 80Hz-100KHz),
ultra low dropout voltage (typically 165mV at
150mA), very low quiescent current (1µA maximum)
and excellent power supply ripple rejection (PSRR
75dB at 100Hz) in battery powered applications, such
as handsets and PDAs and in noise sensitive applica-
tions, such as RF electronics.
The AP2202 also features logic compatible enable/
shutdown control inputs, a low power shutdown mode
for extended battery life, over current protection, over
temperature protection, as well as reversed-battery pro-
tection.
The output capacitor of 1.0µF minimum and 2.2µF
minimum near its pin are recommended when C_BYP is
unused and 470pF respectively. Tantalum or alumin-
ium electrolytic capacitors are adequate. Bypass
capacitor is connected to the internal voltage reference
to quiet noise. Its recommended value is from 470pF to
1nF. If output noise is not a major concern and rapid
turn-on is necessary, omit C_BYP and leave BYP open.
The AP2202 has adjustable, 2.5V, 2.6V, 2.7V, 2.8V,
2.9V, 3.0V, 3.3V and 4.0V versions.
The AP2202 is available in space saving SOT-23-5
package.
· Up to 150mA Regulator Output
· Low Quiescent Current
· Low Dropout Voltage: V_D=165mV at 150mA
· High Precision Output Voltage: ±1%
· Output Noise: 45µVrms at 80Hz-100KHz
· Good Ripple Rejection Ability: 75dB at 100Hz
and I_OUT=100µA
· Tight Load and Line Regulation
· Low Temperature Coefficient
· Over Current Protection
· Thermal Protection
· Reverse-battery Protection
· Zero Off-mode Current
· Logic-controlled Enable
Applications
· Cellular Phones
· Cordless Phones
· Digital Still Cameras
· Wireless Communicators
· PDAs / Palmtops
· PC Mother Board
· Consumer Electronics
Aug. 2005 Rev. 1. 3
SOT-23-5
Figure 1. Package Type of AP2202
BCD Semiconductor Manufacturing Limited
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