7

LT1036

1036fb

Fast Turn-Off, Delayed Turn-On

APPLICATIO S I FOR ATIO

Output Current

The main output current limits at about 4A for input

voltages below 20V. Internal foldback, or “power limit-

ing”, circuitry detects the input-output voltage differential

and reduces current limit for input to output voltages

exceeding 8V. With 25V input, for instance, short circuit

current is reduced to

≈ 0.9A.

An additional feature of the LT1036 is that the auxiliary

supply does not incorporate, nor is it affected by, thermal

shutdown. Any fault condition of the main regulator will

not affect the auxiliary output voltage.

The following applications circuits will serve to indicate

the versatility of the LT1036.

TYPICAL APPLICATIO S

Latch-Off with Output Short

Delayed Power-Up

Thermal Cutoff at High Ambient Temperature

Power Supply Turn-On Sequencing

12V

LT1036M/1036C • TA01

+

LT1036

GND

OUT

IN

AUX

R1

100k

EN

C1

*CAN BE ANY GATE TYPE

*

LT1036M/1036C • TA02

12V

5V

LT1036

GND

OUT

IN

AUX

EN

68k

0.33

µF

LT1036M/1036C • TA03

12V

5V

R1

27k

LT1036

GND

OUT

IN

AUX

EN

C1

LT1036M/1036C • TA04

LT1036

GND

OUT

IN

AUX

26.1k

154k

EN

5V

*YELLOW SPRINGS #44008. 30k

Ω at 25°C

LT1036

GND

OUT

IN

AUX

R1

EN

LT1036

GND

OUT

IN

AUX

EN

C1

LT1036M/1036C • TA05

R2

C2