MIC5256_10 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 150mA μCap LDO with Error Flag

MIC5256
150mA µCap LDO with Error Flag
General Description
The MIC5256 is an efficient, precise CMOS voltage
regulator. 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
devices, 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.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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 accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
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Typical Application
Low-Noise Regulator Application
IttyBitty is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
August 2010
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M9999-080510