LM337M Просмотр технического описания (PDF) - ON Semiconductor

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производитель

LM337M

MEDIUM CURRENT THREE–TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR

ON Semiconductor 

LM337M

Figure 2. Load Regulation and ∆IAdj/Load Test Circuit

R2 1%

Cin

–Vin

1.0µF

IAdj

Adjust

Vin

LM33M

R1

120

1%

Vout

IL

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

CO +

1.0µF

* Pulse Testing required:

1% Duty Cycle is suggested.

*

RL

(max

Load)

–VO (min Load)

VO (max Load)

Load Regulation (%/VO) =

VO (min Load) – VO(max Load)

VO (min Load)

x 100

Figure 3. Standard Test Circuit

R2 1%

Cin 1.0µF

VI

+

CO 1.0µF

RL

VO

To Calculate R2:

R2 =

VO

Vref

– 1 R1

This assumes IAdj is negligible.

IAdj

Vref

Adjust

Vin

Vout

LM337M

R1 120

IL

Pulse Testing Required: 1% Duty Cycle is suggested.

14.3V

4.3V

Figure 4. Ripple Rejection Test Circuit

R2 1%

Cin 1.0µF

+

CAdj 10µF

+

CO 1.0µF

Adjust

Vin

LM337M

R1 120 D1 *

Vout

1N4002

RL

VO

Vout = –1.25 V

f = 120 Hz

*D1 Discharges CAdj if Output is shorted to Ground.

4

MOTOROLA ANALOG IC DEVICE DATA

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