The MIC5271 is a µCap 100 mA negative regulator in
a SOT23-5 package. With better than 2% initial
accuracy, this regulator provides a very accurate
supply voltage for applications that require a negative
rail. The MIC5271 sinks 100 mA of output current at
very low dropout voltage (500 mV typical, 700 mV
maximum at 100 mA of output current).
The µCap regulator design is optimized to work with
low-value, low-cost ceramic capacitors. The output
typically requires only a 1 µF capacitance for stability.
Designed for applications where small packaging and
efficiency are critical, the MIC5271 combines LDO
design expertise 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, in which the ground
current is only ±1 µA, typical.
The MIC5271 is available in the 5-pin SOT23 package
for space saving applications and it is available with an
adjustable output.
Applications
•
•
•
•
•
GaAsFET Bias
Portable Cameras and Video Recorders
PDAs
Battery-Powered Equipment
Post-Regulation of DC/DC Converters
Package Types
MIC5271YM5
5-Lead SOT23 (M5)
Adjustable Output Voltage
(Top View)
MIC5271-5.0YM5 *
5-Lead SOT23 (M5)
Fixed Output Voltage
(Top View)
ADJ GND EN
1
2
3
L9AA
4
–OUT
5
–IN
NC GND EN
1
2
3
L950
4
–OUT
5
–IN
* 5.0V pinout shown. 3.0V version is identical.
Please see pin descriptions in
Table 3-1.
2017 Microchip Technology Inc.
DS20005881A-page 1
MIC5271
Typical Application Circuit
MIC5271
SOT23-5
MIC5271YM5
2
1
V
IN
–6.0V
5
1μF
GND
EN
–IN
–OUT
4
ADJ
3
R1
R2
V
OUT
–5.0V
10μF
Functional Block Diagram
MIC5271YM5
(Adjustable Version)
GND
+–
–
+
ADJ
EN
–IN
MIC5271YM5
MIC5271-x.xYM5
(Fixed Version)
–OUT
GND
+
+–
–
EN
–IN
MIC5271-x.xYM5
–OUT
DS20005881A-page 2
2017 Microchip Technology Inc.
MIC5271
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Input Voltage (V–
IN
) ................................................................................................................................... –20V to +0.3V
Enable Voltage (V
EN
) .................................................................................................................................. –20V to +20V
Power Dissipation .................................................................................................................................. Internally Limited
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