7805A Просмотр технического описания (PDF) - Wing Shing International Group

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производитель

7805A

3-Terminal positive Voltage Regulators

Wing Shing International Group 

7805A

Test Circuits

3- Terminal Positive Voltage Regulators

VIN 1

CIN

0.33uF

7805A

2

3 VOUT

VIN 1

COUT

0.1uF

CIN

0.33uF

3

7805A

2

RL

VOUT

270pF

100

DC Parameter

Load Regulation

VIN

1

-+

VOUT

0V

+

-

DC 9V

7805A

3 VOUT

2

RL

Ripple Rejection

Application Circuits

Constant Current Regulator

Circuit for Increasing Output Voltage

VIN 1

3

7805A

0.33uF

2

R1

IR1

0.1uF

VOUT

10uF

VIN 1

0.33uF

3

7805A

IB 2

R1

R2

0.1uF

VOUT

10uF

VOUT=VOUT(IC)+VZ

I1=VOUT(IC)/R1

High Output Current with Short-circuit Protection

VIN

Rsc

Q1

R1 Q2

1

0.33uF

7805A

2

3

VOUT

0.1uF 10uF

VOUT=VOUT(IC)(1+R2/R1)+R2*IB

R1≤VBE1/IB(max)

RSC=VBE2/ISC, ISC: Short-Circuit Current

3

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