MIC5256 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 150mA UCap LDO with Error Flag

MIC5256
Micrel
MIC5256
150mA µCap LDO with Error Flag
Final Information
General Description
The MIC5256 is an efficient, precise CMOS voltage regula-
tor. It offers better than 1% initial accuracy, extremely low-
dropout voltage (typically 135mV at 150mA) and low ground
current (typically 90µA) over load. The MIC5256 features an
error flag that indicates an output fault condition such as
overcurrent, thermal shutdown and dropout.
Designed specifically for handheld and battery-powered de-
vices, the MIC5256 provides a TTL-logic-compatible enable
pin. When disabled, power consumption drops nearly to zero.
The MIC5256 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, faster
transient response, and an active clamp to speed up device
turnoff. Available in the IttyBitty™ SOT-23-5 package and the
new Thin SOT-23-5, which offers the same footprint as the
standard IttyBitty™ SOT-23-5, but only 1mm tall. The MIC5256
offers a range of output voltages.
Features
• Input voltage range: 2.7V to 6.0V
• Thin SOT package: 1mm height
• Error flag indicates fault condition
• Stable with ceramic output capacitor
• Ultralow dropout: 135mV @ 150mA
• High output accuracy:
1.0% initial accuracy
2.0% over temperature
• Low quiescent current: 90µA
• Tight load and line regulation
• Thermal shutdown and current limit protection
• “Zero” off-mode current
• TTL logic-controlled enable input
Applications
• Cellular phones and pagers
• Cellular accesories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
Typical Application
Ordering Information
Part Number
Marking Voltage
MIC5256-2.6BM5
LX26
2.6V
MIC5256-2.7BM5
LX27
2.7V
MIC5256-2.8BM5
LX28
2.8V
MIC5256-2.85BM5
LX2J
2.85V
MIC5256-3.0BM5
LX30
3.0V
MIC5256-3.3BM5
LX33
3.3V
MIC5256-2.85BD5
NX2J
2.85V
Other voltages available. Contact Micrel for details.
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
TSOT-23-5
C_IN = 1.0µF ^VIN
Ceramic
Enable
Shutdown
EN (pin 3) may be
connected directly
to IN (pin 1).
EN
MIC5256-x.xBM5
1
5
2
3
4
V_OUT
C_OUT = 1.0µF
Ceramic
FLG
Low-Noise Regulator Application
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
June 2003
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MIC5256