MIC5205
150mA Low-Noise LDO Regulator
General Description
The MIC5205 is an efficient linear voltage regulator with
ultra low-noise output, very low dropout voltage (typically
17mV at light loads and 165mV at 150mA), and very low
ground current (600⎧A at 100mA output). The MIC5205
offers better than 1% initial accuracy.
Designed especially for hand-held, battery-powered
devices, the MIC5205 includes a CMOS or TTL compatible
enable/shutdown control input. When shut down, power
consumption drops nearly to zero. Regulator ground
current increases only slightly in dropout, further
prolonging battery life.
Key MIC5205 features include a reference bypass pin to
improve its already excellent low-noise performance,
reversed-battery protection, current limiting, and
overtemperature shutdown.
The MIC5205 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package.
For low-dropout regulators that are stable with ceramic
output capacitors, see the
µ
Cap MIC5245/6/7 family.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
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Ultra-low-noise output
High output voltage accuracy
Guaranteed 150mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Reverse-battery protection
“Zero” off-mode current
Logic-controlled electronic enable
Applications
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Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
PCMCIA V
CC
and V
PP
regulation/switching
Consumer/personal electronics
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
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Typical Application
Ultra-Low-Noise Regulator Application
Xxxxx is a trademark of Micrel, Inc
Xxxxx is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
February 2006
M9999-020806
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
