11

LTC1153

S

APPLICATI

I FOR ATIO

Five volt linear regulators with small output capacitors

are the most difficult to protect as they can “switch”

from a voltage mode to a current limited mode very

quickly. The large output capacitors on many switching

regulators, on the other hand, may be able to hold the

supply pin of the LTC1153 above 3.5V sufficiently long

that this extra filtering is not required.

TYPICAL APPLICATIO S

Over-Temperature Circuit Breaker

24V to 28V Over-Temperature Circuit Breaker

Over-Voltage Circuit Breaker

24V to 28V Over-Temperature Circuit Breaker

with Bootstrapped Supply

IN

STATUS

GND

DS

G

SD

LTC1153

0.47

µF

+

100

µF

MTD3055E

12V

LTC1153 • TA03

12V

LOAD

51k

*RL3006-50-100-25-PT0 KEYSTONE

30k

5V

*PTC

THERMISTOR

(100°C)

5V

Because the LTC1153 is micropower in both the standby

and ON state, the voltage drop across the supply filter

is less than 2mV, and does not significantly alter the

accuracy of the 100mV drain sense threshold voltage.

IN

STATUS

GND

DS

G

SD

LTC1153

0.22

µF

+

10

µF

IRLD024

4.75V TO 5.25V

LTC1153 • TA05

5V

LOAD

51k

5V

100

Ω

5.6V

IN

STATUS

GND

DS

G

SD

LTC1153

0.47

µF

+

100

µF

MTP15N06E

24V TO 28V

LTC1153 • TA06

24V TO 28V

LOAD

5V

5V

30k

+

10

µF

18V

100k

*PTC

THERMISTOR

(100°C)

6.2k

1N4148

KEYSTONE RL2006-100-100-30-PT.

MOUNT ON MOSFET OR LOAD HEAT SINK.

*

**

51k

IN

STATUS

GND

DS

G

SD

LTC1153

0.47

µF

+

100

µF

MTP12N06

24V TO 28V

LTC1153 • TA04

24V TO 28V

LOAD

51k

5V

5V

30k

*KEYSTONE RL2006-100-100-30-PT.

MOUNT ON MOSFET OR LOAD HEAT SINK.

+

10

µF

18V

3k

*PTC

THERMISTOR

(100°C)