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Fabricante

LT1033

3A Negative Adjustable Regulator

Linear Technology 

LT1033

TYPICAL APPLICATIO S

The output stability, load regulation, line regulation,

thermal regulation, temperature drift, long term drift, and

noise can be improved by a factor of 6.6 over the standard

regulator configuration. This assumes a zener whose drift

and noise is considerably better than the regulator itself.

The LM329B has 20ppm/°C maximum drift and about 10

times lower noise than the regulator.

In the application shown below, regulators #2 to “N” will

track regulator #1 to within ±24mV initially, and to ±60mV

over all load, line, and temperature conditions. If any

regulator output is shorted to ground, all other outputs will

drop to ≈ –2V. Load regulation of regulators #2 to “N” will

be improved by VOUT/1.25V compared to a standard

regulator, so regulator #1 should be the one which has the

lowest load current.

Multiple Tracking Regulators

C3

10µF

R2

2µF

C1

2µF

1N4002

R1

SOLID

ADJ

120Ω

TANTALUM

–VIN

VIN REG #1 VOUT

–VOUT1

LT1033

2µF

ADJ

VIN REG #2 VOUT

LT1033

1N4002

2µF

SOLID

TANTALUM

–VOUT2

High Stability Regulator

ADJ

–VIN

VIN

VOUT

LT1033

7V

R2*

LM329B

R3

R1

1.5k

1k

1%

1%

1µF

SOLID

TANTALUM

|VOUT|

*R2 =

9.08 • 10–3

–VOUT

– 908Ω

LT1033 • TA06

Dual Tracking 3A Supply ± 1.25V to ± 20V

LT150A

+VIN

VIN

VOUT

ADJ

+

R2

10µF

5k

1%

+

R4

10µF

5k

1%

ADJ

–VIN

VIN

VOUT

LT1033

R1**

100Ω +

1%

2.2µF*

R3

5k

R5** +

100Ω

1%

2.2µF*

*SOLID TANTALUM

**R1 OR R5 MAY BE TRIMMED SLIGHTLY TO IMPROVE TRACKING

+VOUT

D1

1N4002

D2

1N4002

–VOUT

LT1033 • TA07

2µF

ADJ

VIN REG #N VOUT

LT1033

2µF

SOLID

TANTALUM

–VOUT3

LT1033 • TA05

Current Regulator

ADJ

(–)

VIN

VOUT

LT1033

+ C1

2µF

SOLID TANTALUM

RS

(+)

I

(O.5Ω ≤ RS ≤ 250Ω)

I = 65µA + 1.25V

RS

LT1033 • TA08

1033fc

7

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