LM317M データシートの表示（PDF） - ON Semiconductor

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LM317M

500 mA Adjustable Output, Positive Voltage Regulator

ON Semiconductor 

Vin

Vin

Cin

0.1mF

LM317M, NCV317MAB, NCV317MB

LM317M

Load Regulation (mV) = VO (min Load) -VO (max Load)

VO (min Load) - VO (max Load)

Load Regulation (% VO) =

VO (min Load)

X 100

Vout

IL

VO (min Load)

VO (max Load)

Adjust

IAdj

240

R1 1%

+

CO 1.0mF

RL

(max Load)

*

RL

(min Load)

* Pulse Testing Required:

  1% Duty Cycle is suggested.

R2

1%

Figure 4. Load Regulation and DIAdj/Load Test Circuit

Vin

VI

Cin 0.1mF

*Pulse Testing Required:

1% Duty Cycle is suggested.

Vout

LM317M

IL

Adjust

IAdj

R1

240

1%

Vref

ISET

R2

1%

To Calculate R2:

Vout = ISET R2 + 1.250 V

Assume ISET = 5.25 mA

Figure 5. Standard Test Circuit

+

CO 1mF

RL

VO

24V

14V

f = 120 Hz

Vin

Vout

LM317M

Vout = 10 V

Cin 0.1mF

Adjust

R1

240

1%

D1 *

1N4002

RL

+

CO 1.0mF

VO

R2

1.65K

1%

**

+

CAdj

10mF

 * D1 Discharges CAdj if Output is Shorted to Ground.

**CAdj provides an AC ground to the adjust pin.

Figure 6. Ripple Rejection Test Circuit

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