MIC5270 Datasheet, PDF (1/4 Pages) Micrel Semiconductor – IttyBitty™ Negative Low-Dropout Regulator Preliminary Information

MIC5270
Micrel
MIC5270
IttyBitty™ Negative Low-Dropout Regulator
Preliminary Information
General Description
Features
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.
• IttyBitty^™ SOT-23-5 packaging
• Low dropout voltage
• Low ground current
• Tight initial accuracy
• Tight load and line regulation
• Thermal shutdown
• Current limiting
• Stable with low-ESR ceramic capacitors
Applications
• GaAsFET bias
• Portable cameras and video recorders
• PDAs
• Battery-powered equipment
The MIC5270 is available in the SOT-23-5 package for space
saving applications and it is available with fixed –3.0V, –4.1V,
and –5.0V outputs.
Ordering Information
Part Number
MIC5270-3.0BM5
MIC5270-4.1BM5
MIC5270-5.0BM5
Voltage
–3.0V
–4.1V
–5.0V
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
V_IN
–6.0V
MIC5270-5.0
2 _GND
5
4
–IN –OUT
1µF
10µF
V_OUT
–5.0V
Pin Configuration
NC GND NC
3
2
1
LLxx
4
5
–OUT
–IN
MIC5270-x.xBM5
Pin Description
Pin Number
1
2
3
4
5
Pin Name
NC
GND
NC
–OUT
–IN
Pin Function
Not internally connected.
Ground
Not internally connected.
Negative Regulator Output
Negative Supply Input
IttyBitty is a trademark of Micrel, Inc.
March 1999
283
MIC5270