NCP1117DTAT5(2004) Просмотр технического описания (PDF) - ON Semiconductor

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NCP1117DTAT5
(Rev.:2004)

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 24. Constant Current Regulator

Input

10

mF

3 NCP1117 2

Output

XTA

+

R1

+ 10

1

50 k 1N4001 mF

R2

2N2907

10

mF

Figure 25. 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 26. 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 27. 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 28. 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 29. Adjusting Output of Fixed

Voltage Regulators

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