LM317L 查看數據表（PDF） - ON Semiconductor

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LM317L

LOW CURRENT THREE-TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

ON Semiconductor 

LM317L, NCV317LB

VCC

*

Line Regulation (%/V) =

VOH - VOL

VOL

x 100

VIH

VIL Vin

Vout

LM317L

VOH

VOL

Adjust

R1

240

1%

+

RL

Cin 0.1mF

IAdj

CO 1mF

*ĂPulse Testing Required:

ăĂ1% Duty Cycle is suggested.

R2

1

%

Figure 2. Line Regulation and DIAdj/Line Test Circuit

Vin*

Vin

Cin 0.1mF

LM317L

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

Load Regulation (% VO) =

VO (min Load) - VO (max Load)

VO (min Load)

X

100

Vout

IL

VO (min Load)

VO (max Load)

Adjust

IAdj

R1

240

1%

+

CO 1.0mF

RL

(max Load)

*

RL

(min Load)

*ĂPulse Testing Required:

ăĂ1% Duty Cycle is suggested.

R2

1%

Figure 3. Load Regulation and DIAdj/Load Test Circuit

Vin

Vout

LM317L

IL

VI

Pulse Testing Required:

1% Duty Cycle is suggested.

Cin 0.1mF

Adjust

IAdj

ISET

R2

1%

R1

240

1%

Vref

+

CO 1mF

To Calculate R2:

Vout = ISET R2 + 1.250 V

Assume ISET = 5.25 mA

Figure 4. Standard Test Circuit

RL

VO

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