LM337D2TR4G datasheet(4/10 Pages) ONSEMI

部件名	LM337D2TR4G

功能描述	1.5 A, Adjustable Output, Negative Voltage Regulator

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制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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4 / 10 page

LM337

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4

Figure 2. Load Regulation and

DIAdj/Load Test Circuit

Figure 3. Standard Test Circuit

Figure 4. Ripple Rejection Test Circuit

VO (min Load) − VO (max Load)

Cin

1.0

mF

R2

1%

R1

120

CO +

RL

(max

Load)

Adjust

Vin

−VI

LM337

Vout

*Pulse testing required.

1% Duty Cycle is suggested.

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

Load Regulation (% VO) =

x 100

IL

IAdj

1.0

mF

−VO (min Load)

−VO (max Load)

VO

RL

+

1.0

mF

CO

R1

120

1%

R2

Cin

Adjust

Vin

LM337

To Calculate R2:

R2 =

− 1

R1

This assumes IAdj is negligible.

* Pulse testing required.

* 1% Duty Cycle is suggested.

VI

IAdj

Vref

IL

VO

1.0

mF

Vout

RL

+

1.0

mF

CO

1N4002

D1*

Cin

1%

R2

Adjust

Vin

LM337

R1

120

14.3 V

4.3 V

f = 120 Hz

CAdj

+

Vout = −1.25 V

* D1 Discharges CAdj if output is shorted to Ground.

1.0

mF

10

mF

Vout

VO

*

VO (min Load)

Vref

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