MIC5206
150mA Low-Noise LDO Regulator
Micrel Mini 8 is a 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
May 2006
M9999-051506
(408) 955-1690
General Description
The MIC5206 is an efficient linear voltage regulator with
very low dropout voltage (typically 17mV at light loads and
165mV at 150mA), and very low ground current (600µA at
100mA output), with better than 1% initial accuracy. It has
a logic compatible enable/shutdown control input and an
internal undervoltage monitor.
Designed especially for hand-held, battery-powered
devices, the MIC5206 can be switched by a CMOS or TTL
compatible logic signal. When disabled, power
consumption drops nearly to zero. Dropout ground current
is minimized to prolong battery life.
Key features include an undervoltage monitor with an error
flag output, a reference bypass pin to improve its already
low-noise performance (8-pin versions only), reversed-
battery protection, current limiting, and overtemperature
shutdown.
The MIC5206 is available in several fixed voltages in a tiny
SOT-23-5 package. It features a pinout, similar to the
LP2980, but has significantly better performance. Fixed
and adjustable output voltage versions, featuring the
reference bypass option, are available in the 8-pin Micrel
Mini 8™ 8-pin MSOP (micro small-outline package).
For low-dropout regulators that are stable with ceramic
output capacitors, see the µCap MIC5245/6/7 family.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Error flag indicates undervoltage fault
• High output voltage accuracy
• Guaranteed 150mA output
• Ultra-low-noise output (8-pin versions)
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• “Zero” off-mode current
• Logic-controlled electronic enable
Applications
• 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
Typical Application
SOT-23-5 Fixed Voltage Application
Adjustable Voltage Application
