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MIC2940A-5.0BU Datasheet(PDF) 8 Page - Micrel Semiconductor

Part # MIC2940A-5.0BU
Description  1.2A Low-Dropout Voltage Regulator
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2940A-5.0BU Datasheet(HTML) 8 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2940A/2941A
July 2007
8
M9999-071307
Typical Applications
VIN
+VIN
VOUT
VOUT = 5V
GND
10µF
+
Figure 2. MIC2940A-5.0 Fixed +5V Regulator
OUT
GND
ADJUST
V
VIN
+VIN
VOUT =V IN
* Minimum Input-Output Voltage Ranges from 40mV to 400mV,
depending on Load Current.
Figure 4. MIC2941A Wide Input Voltage Range
Current Limit
IN
OUT
GND AD JUST
SHUTDOWN
V
V
SHUTDOWN
INPUT
IN
+V
OUT
V
1.2V
26V
1
R 100
pF
22µF
2
R
1.23V
RE F
V
VOUT =VREF x (1 +
)
1
R
2
R
OF F
ON
Figure 3. MIC2941A Adjustable Regulator
SHUTDOWN
V
GND
OUT
+VIN
ADJ
SHUTDOWN
INPUT
100pF
2N2222
1%
300k
+5V to +7V
1%
180k
+
10µF
470 k
OFF
ON
5V
3.3V
220k
1%
VCC OUT
Adjust Pin Low = Enable Output. Q1 ON = 3.3V, Q1 OFF = 5.0V.
Figure 5. MIC2941A 5.0V or 3.3V Selectable Regulator
with Shutdown


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