LM317LD datasheet(4/12 Pages) ONSEMI

tên linh kiện	LM317LD

Giải thích chi tiết về linh kiện	LOW CURRENT THREE-TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

PDF	12 Pages

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nhà sản xuất	ONSEMI [ON Semiconductor]

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LM317L

MOTOROLA ANALOG IC DEVICE DATA

* Pulse Testing Required:

1% Duty Cycle is suggested.

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

Load Regulation (% VO) =

VO (min Load) – VO (max Load)

100

VO (min Load)

VO (max Load)

LM317L

Cin

0.1

µF

Adjust

1.0

µF

(max Load)

(min Load)

Vout

240

Vin*Vin

IAdj

Figure 2. Load Regulation and

∆IAdj/Load Test Circuit

VO (min Load)

Pulse Testing Required:

1% Duty Cycle is suggested.

LM317L

Vin

Vout

Adjust

240

µF

Cin

To Calculate R2:

Vout = ISET R2 + 1.250 V

Assume ISET = 5.25 mA

IAdj

ISET

Vref

0.1

µF

Figure 3. Standard Test Circuit

LM317L

Vin

Vout

Vout = 1.25 V

Cin

0.1

µF

Adjust

240

D1 *

1N4002

µF

14.30V

4.30V

1.65K

µF

*D1 Discharges CAdj if Output is Shorted to Ground.

f = 120 Hz

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

Figure 4. Ripple Rejection Test Circuit

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