|
MIC5271 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – μCap Negative Low-Dropout Regulator | |||
|
MIC5271
Micrel
MIC5271
µCap 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 IttyBittyï 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
Micrelâs 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
⢠IttyBittyï 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
Marking Voltage* Junction Temp. Range
MIC5271BM5
L9AA
Adj.
â40°C to +125°C
MIC5271-3.0BM5
L930
â3.0V
â40°C to +125°C
MIC5271-5.0BM5
L950
â5.0V
â40°C to +125°C
* For other voltage options, please contact Micrel Marketing.
Package
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
VIN
â6.0V
MIC5271BM5
2 GND ADJ 3
1 EN
5
4
âIN âOUT
1µF
10µF
R1
R2
VOUT
â5.0V
Enable Input
5
4
3
Regulator On
2
1
0
Regulator Off
-1
-2
-3
Regulator On
-4
-5-3 -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
|
▷ |