MIC5258
Micrel
MIC5258
150mA
µ
Cap CMOS LDO Regulator w/Power Good
Final Information
General Description
The MIC5258 is an efficient, precise CMOS voltage regulator
with power good output. The MIC5258 offers better than 3%
initial accuracy, and constant ground current (typically
100µA)over load .
The MIC5258 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
Key features include current limit, thermal shutdown, a push-
pull output for faster transient response, and an active clamp
to speed up device turnoff. Available in the IttyBitty™ SOT-23-5
package, the MIC5258 is a fixed 1.2V regulator.
Features
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Power Good indicator
Load independent, ultralow ground current: 100µA
150mA output current
Current limiting
Thermal shutdown
Tight load and line regulation
“Zero” off-mode current
Stability with low-ESR capacitors
Fast transient response
TTL-Logic-controlled enable input
Applications
• Processor power-up sequencing
• Laptop, notebook, and palmtop computers
• PCMCIA V
CC
and V
PP
regulation/switching
Ordering Information
Part Number
MIC5258-1.2BM5
Marking
LN12
Voltage
1.2
Junction Temp. Range*
–40°C to +125°C
Package
SOT-23-5
Other voltages available. Contact Micrel for details.
Typical Application
47k
V
IN
MIC5258-x.xBM5
1
2
Enable
Shutdown
3
4
5
V
OUT
C
OUT
PG
EN
EN (pin 3) may be
connected directly
to IN (pin 1).
Low-Noise Regulator Application
IttyBitty 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
September 2001
1
MIC5258