MIC5270
Micrel, Inc.
MIC5270
µ
Cap Negative Low-Dropout Regulator
General Description
The MIC5270 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 MIC5270 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 MIC5270 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 MIC5270 is available in the SOT-23-5 package for space
saving applications and it is available with fixed –3.0V, –4.1V,
–5.0V, and adjustable outputs.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
•
•
•
•
•
•
•
Stable with ceramic or tantalum capacitor
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
Applications
•
•
•
•
GaAsFET bias
Portable cameras and video recorders
PDAs
Battery-powered equipment
Ordering Information
Standard
MIC5270BM5
MIC5270-3.0BM5
MIC5270-4.1BM5
MIC5270-5.0BM5
Part Number
Marking Code
PbFree
LLAA
LL30
LL41
LL50
MIC5270YM5
MIC5270-3.0YM5
MIC5270-4.1YM5
MIC5270-5.0YM5
Marking Code
LLAA
LL30
LL41
LL50
Voltage
Adj.
–3.0V
–4.1V
–5.0V
Junction
Temp. Range
–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
Typical Application
MIC5270-5.0BM5
2
MIC5270BM5
2
R1
R2 V
OUT
–5.0V
V
IN
–6.0V
GND
–IN –OUT
4
5
V
OUT
–5.0V
GND ADJ
–IN
–OUT
3
4
V
IN
–6.0V
5
1µF
10µF
1µF
10µF
Regulator With Fixed Output
Regulator With Adjustable Output
IttyBitty is a registered trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2005
1
M9999-052705
MICREL [ MICREL SEMICONDUCTOR ]
