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MIC5252-2.5BM5 Datasheet(PDF) 1 Page - Micrel Semiconductor

Part # MIC5252-2.5BM5
Description  150mA High PSRR, Low Noise 關Cap CMOS LDO
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC5252-2.5BM5 Datasheet(HTML) 1 Page - Micrel Semiconductor

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MIC5252
Micrel, Inc.
February 2005
1
M9999-020305
General Description
The MIC5252 is an efficient, precise CMOS voltage regulator
optimized for ultra-low-noise applications. It offers 1% initial
accuracy, extremely-low dropout voltage (135mV at 150mA)
and low ground current (typically 90µA). The MIC5252
provides a very-low-noise output, ideal for RF applications
where a clean voltage source is required. The MIC5252 has
a high PSRR even at low supply voltages, critical for battery
operated electronics. A noise bypass pin is also available for
further reduction of output noise.
Designed specifically for handheld and battery-powered
devices, the MIC5252 provides a TTL-logic-compatible en-
able pin. When disabled, power consumption drops nearly
to zero.
The MIC5252 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in handheld wireless devices.
Key features include current limit, thermal shutdown, faster
transient response, and an active clamp to speed up device
turn-off. The MIC5252 is available in the 6-pin 2mm × 2mm
MLF™ package and the IttyBitty® SOT-23-5 package in a
wide range of output voltages.
Typical Application
C OUT = 1.0µF
C IN = 1.0µF
Ceramic
Ceramic
1
5
2
3
4
C BYP = 0.01µF
Enable
Shutdown
EN
VOUT
MIC5252-x.xBM5
EN (pin 3) may be
connected directly
to IN (pin 1).
VIN
MIC5252
150mA High PSRR, Low Noise µCap CMOS LDO
Features
• Input voltage range: 2.7V to 6.0V
• PSRR = 50dB @ VO + 0.3V
• Ultra-low output noise: 30µV(rms)
• Stability with ceramic output capacitors
• Ultra-low dropout: 135mV @ 150mA
• High output accuracy:
1.0% initial accuracy
2.0% over temperature
• Low quiescent current: 90µA
• Tight load and line regulation
• TTL-Logic-controlled enable input
• “Zero” off-mode current
• Thermal shutdown and current limit protection
Applications
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
IttyBitty is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology.
MIC5252-x.xBML
1
EN
6
CBYP
(optional)
VIN
VOUT
COUT
5
4
2
3
ENABLE
SHUTDOWN
Ultra-Low-Noise Regulator Application


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