MIC5206
Micrel
MIC5206
150mA Low-Noise LDO Regulator
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-lead 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 adjust-
able output voltage versions, featuring the reference bypass
option, are available in the 8-lead Micrel Mini 8™ 8-lead
MSOP (micro small-outline package).
Features
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Error flag indicates undervoltage fault
High output voltage accuracy
Guaranteed 150mA output
Ultra-low-noise output (8-lead 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
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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
For low-dropout regulators that are stable with ceramic
output capacitors, see the
µ
Cap MIC5245/6/7 family.
Typical Applications
47k
V
OUT
1
8
7
6
5
V
IN
Enable
Shutdown
MIC5206-x.xBM5
V
IN
1
2
Enable
Shutdown
Enable (pin 3) may be
connected directly to
Supply Input (pin 1).
3
4
5
1µF
2
3
4
V
OUT
100k
C
OUT
1µF tantalum
Flag Output
(optional)
tantalum
R1
MIC5206BMM
Enable (pin 7) may be
connected directly to
Supply Input (pin 8).
Flag Output
(optional)
R2
SOT-23-5 Fixed Voltage Application
Adjustable Voltage Application
Micrel Mini 8™ is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2000
1
MIC5206
MICREL [ MICREL SEMICONDUCTOR ]
