MIC2940A-12WT 데이터 시트보기 (PDF) - Micrel

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MIC2940A-12WT

1.2A Low-Dropout Voltage Regulator

Micrel 

Micrel, Inc.

Typical Applications

V IN

+VIN

V OUT

VOUT = 5V

+ 10µF

GND

Figure 2. MIC2940A-5.0 Fixed +5V Regulator

+VIN

VIN

VOUT

VOUT = V IN

GND ADJUST

* Minimum Input-Output Voltage Ranges from 40mV to 400mV,

depending on Load Current.

Figure 4. MIC2941A Wide Input Voltage Range

Current Limit

MIC2940A/2941A

+VIN

VIN

VOUT

VO U T

1.2V 26V

SHUTDOWN

INPUT

SHUTDOWN

OFF

GND ADJUST

ON

1.23V

R1 100

pF

22µF

VOUT = VR E F x (1 +

R1 )

R2

VREF

R2

Figure 3. MIC2941A Adjustable Regulator

+5V to +7V

+VIN

SHUTDOWN

INPUT

SHUTDOWN

OFF

VOUT

ON

GND

ADJ

VCC OUT

100pF

300k

1%

+

10µF

5V

3.3V

470 k

220k

1%

180k

1%

2N2222

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

July 2007

8

M9999-071307

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