NCP1117DT285RKG(2014) Ver la hoja de datos (PDF) - ON Semiconductor

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componentes Descripción

Fabricante

NCP1117DT285RKG
(Rev.:2014)

1.0 A Low-Dropout Positive Fixed and Adjustable Voltage Regulators

ON Semiconductor 

NCP1117, NCV1117

Input

10

mF

3 NCP1117 2

XTA

+

1

Constant Current

Output

R

+ 10

mF

Iout

+

Vref

R

)

Iadj

Figure 27. Constant Current Regulator

Input

10

mF

3 NCP1117 2

Output

XTA

+

R1

+ 10

1

50 k 1N4001 mF

R2

2N2907

10

mF

Figure 28. Slow Turn−On Regulator

Input

3 NCP1117 2

Output

XTA

10 +

mF

1

+ 10

120

mF

Output Control 1.0 k

On

Off

1.0 k

360

2N2222

Vout(Off) + Vref

Figure 29. Regulator with Shutdown

Input

10

mF

3 NCP1117 2

XTA

+

1

Output

+ 10

R1

mF

R2

2N2222

Output Voltage Control

Resistor R2 sets the maximum output voltage. Each

transistor reduces the output voltage when turned on.

Figure 30. Digitally Controlled Regulator

Input

3 NCP1117 2

10 +

XT50

mF

1

50 W

RCHG

3 NCP1117 2

+ 10 +

6.6 V − mF

XT50

1

Output

+ 10

mF

5.3 V AC Line

5.0 V Battery

The 50 W resistor that is in series with the ground pin of the

upper regulator level shifts its output 300 mV higher than the

lower regulator. This keeps the lower regulator off until the

input source is removed.

Figure 31. Battery Backed−Up Power Supply

Input

10

mF

3 NCP1117 2

XT50

+

1

Output

5.0 V to

+ 10 12 V

mF

+ 10

2.0 k

mF

Figure 32. Adjusting Output of Fixed

Voltage Regulators

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