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MIIC5271

Description
UCAP NEGATIVE LOW DROPOUT REGULATOR
File Size115KB,10 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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MIIC5271 Overview

UCAP NEGATIVE LOW DROPOUT REGULATOR

MIC5271
Micrel
MIC5271
µ
Cap Negative Low-Dropout Regulator
General Description
The MIC5271 is a
µCap
100mA negative regulator in a
SOT-23-5 package. With better than 2% initial accuracy, this
regulator provides a very accurate supply voltage for applica-
tions that require a negative rail. The MIC5271 sinks 100mA
of output current at very low dropout voltage (600mV maxi-
mum at 100mA of output current).
The
µCap
regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The output typically re-
quires only a 1µF capacitance for stability.
Designed for applications where small packaging and effi-
ciency are critical, the MIC5271 combines LDO design exper-
tise with IttyBitty
packaging to improve performance and
reduce power dissipation. Ground current is optimized to help
improve battery life in portable applications. The MIC5271
also includes a TTL-compatible enable pin, allowing the user
to put the part into a zero-current off-mode.
The MIC5271 is available in the SOT-23-5 package for space
saving applications and it is available with an adjustable
output.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
Stable with ceramic or tantalum capacitor
Positive and negative enable thresholds
Low dropout voltage: 500mV @ 100mA
Low ground current: 35µA @ load = 100µA
Tight initial accuracy:
±2%
Tight load and line regulation
Thermal shutdown
Current limiting
IttyBitty
SOT-23-5 packaging
Zero-current off-mode
Applications
GaAsFET bias
Portable cameras and video recorders
PDAs
Battery-powered equipment
Post-regulation of DC-DC converters
Ordering Information
Part Number
MIC5271BM5
MIC5271-3.0BM5
MIC5271-5.0BM5
Marking
L9AA
L930
L950
Voltage*
Adj.
–3.0V
–5.0V
Junction Temp. Range
–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
* For other voltage options, please contact Micrel Marketing.
Typical Application
Enable Input
5
4
ENABLE VOLTAGE (V)
MIC5271BM5
2
1
R1
R2
3
2
1
0
-1
-2
-3
-4
-5
-3
Regulator On
GND ADJ
EN
–IN
–OUT
3
Regulator Off
V
IN
–6.0V
5
4
V
OUT
–5.0V
Regulator On
1µF
10µF
-5 -7 -9 -11 -13 -15
SUPPLY VOLTAGE (V)
Regulator With Adjustable Output
IttyBitty is a registered trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 2003
1
MIC5271

MIIC5271 Related Products

MIIC5271 MIIC5271-3.0BM5 MIIC5271-5.0BM5 MIIC5271BM5
Description UCAP NEGATIVE LOW DROPOUT REGULATOR UCAP NEGATIVE LOW DROPOUT REGULATOR UCAP NEGATIVE LOW DROPOUT REGULATOR UCAP NEGATIVE LOW DROPOUT REGULATOR
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