MIC5258_06 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 150mA μCap CMOS LDO Regulator w/Power Good

MIC5258
MIC5258
Micrel, Inc.
150mA µCap CMOS LDO Regulator w/Power Good
General Description
The MIC5258 is an efficient, precise CMOS voltage regula-
tor 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
• 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
Typical Application
Part Number
Standard
Marking Pb-Free
Marking
MIC5258-1.2BM5 LN12
MIC5258-1.2YM5 KN12
* Other voltages available. Contact Micrel marketing for information.
Voltage
1.2V
Junction Temp.
Range*
–40ºC to +125ºC
Package
SOT-23-5
Typical Application
47k
V_IN
MIC5258-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
Low-Noise Regulator Application
IttyBitty is a trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
April 2006
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MIC5258