MIC5268 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 150mA UCap CMOS LDO Regulator w/Power Good

MIC5268
Micrel
MIC5268
150mA µCap CMOS LDO Regulator w/Power Good
Preliminary Information
General Description
The MIC5268 is an efficient, precise CMOS voltage regulator
with power good output. The MIC5268 offers better than 3%
initial accuracy, and constant ground current (typically
100µA)over load .
The MIC5268 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 MIC5268 is a fixed 1.2V regulator.
Features
• 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
Marking Voltage
MIC5268-1.2BM5
L512
1.2
Other voltages available. Contact Micrel for details.
Junction Temp. Range*
–40°C to +125°C
Package
SOT-23-5
Typical Application
47k
V_IN
MIC5268-x.xBM5
1
5
2
Enable
3
4
Shutdown
EN
EN (pin 3) may be
connected directly
to IN (pin 1).
V_OUT
C_OUT
PG
1.2V Regulator with Power Good
IttyBitty is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2002
1
MIC5268