CMPWR161 Datasheet, PDF (1/8 Pages) California Micro Devices Corp – Micropower, Low Noise 4.75V/150mA LDO Regulator

CMPWR161
Micropower, Low Noise 4.75V/150mA LDO Regulator
Features
• Excellent power supply ripple rejection for
V_IN-V_OUT down to 110mV
• Excellent power supply ripple rejection in
audible band (20Hz to 20KHz)
• Very low dropout voltage (110mV at 150mA)
• Fast transient response minimizes glitches in
audible band.
• Low noise in audible band
• Guaranteed to deliver 150mA output at
4.75V output
• Low quiescent current—300µA typical
• "Zero" current shutdown mode
• 5205 compatible pin-out
• 5-lead SOT-23 package
• Lead-free version available
Applications
• 5V analog supply for audio CODEC
• Low noise power supply ideal for audio use
• Notebook computers
• Sound cards
• Motherboards
• Set top boxes
Product Description
The CMPWR161 is a micropower, low noise regulator
designed specifically to filter out noise from a 5V digital
supply making it ideal for noise-sensitive analog appli-
cations. The CMPWR161 delivers up to 150mA at a
fixed 4.75V output. A bandgap reference bypass pin
(BYP) provides low noise operation when an external
capacitor is connected between this pin and ground. In
addition, the CMPWR161 features an enable pin (EN)
which allows the regulator to be placed into shutdown
mode supporting low power and battery applications.
The CMOS regulator features low quiescent current
even at full load.
The CMPWR161 is housed in a 5-pin SOT-23 package,
which is ideal for space critical applications. It is avail-
able with optional lead-free finishing.
Typical Application Circuit
Simplified Electrical Schematic
5V
Supply
Voltage
+
C_{IN +}
-
1µF
CMPWR161
V_IN
V_OUT
EN
BYP
GND
GND
10nF
100nF
+^COUT
V_OUT
4.75V@
150mA
10µF
V_IN
EN
BYP
GND
V_REF
4.75V
+
10kHz
-
V_OUT
© 2004 California Micro Devices Corp. All rights reserved.
01/14/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone] L Fax: [phone] L www.calmicro.com
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