AP2201 Datasheet, PDF (1/12 Pages) BCD Semiconductor Manufacturing Limited – 150mA RF ULDO REGULATOR

150mA RF ULDO REGULATOR
General Description
Features
Preliminary Datasheet
AP2201
The AP2201 is a 150mA output current fixed voltage
regulator designed to provide 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 applica-
tions, such as handsets and PDAs and in noise sensitive
applications, such as RF electronics.
The AP2201 also features individual 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-bat-
tery protection.
The output capacitor of 1.0µF minimum and 2.2µF
minimum near its pin are recommended when C_BYP is
not used and when C_BYP is 470pF respectively. The
output capacitor should have 5Ω or less ESR, tantalum
or aluminium 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 con-
cern and rapid turn-on is necessary, omit C_BYP and
leave BYP open.
The AP2201 has 2.6V, 2.8V and 3.0V versions now.
· 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
The AP2201 is available in space saving 5-pin SOT-
23-5 package.
V_IN=3.8V
V_IN
C_IN
1.0µF
AP2201-2.8
V_IN
V_OUT
EN
GND
BYP
C_BYP
470pF
V_OUT=2.8V _VOUT
+ _COUT
2.2µF
tantalum
SOT-23-5
Figure 1. Typical Application of AP2201
Figure 2. Package Type of AP2201
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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