LT1074/LT1076

4

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: To calculate maximum switch “on” voltage at currents between

low and high conditions, a linear interpolation may be used.

clamp level and the switch duty cycle to zero. This approximates the zero

load condition where duty cycle approaches zero.

up for proper regulation.

Note 5: Switch frequency is internally scaled down when the feedback pin

voltage is less than 1.3V to avoid extremely short switch on times. During

(LT1074)

(LT1076).

Note 7: Switch to input voltage limitation must also be observed.

Note 9: Does not include switch leakage.

2k

5.5k

ELECTRICAL CHARACTERISTICS

6V

REGULATOR

AND BIAS

+

–

-POWER

SHUTDOWN

µ

10 A

µ

320 A

µ

+

–

2.35V

0.3V

CURRENT

LIMIT

SHUTDOWN

4.5V

10k

S

+

–

CURRENT

LIMIT

COMP

C2

15

400

+

–

C1

R/S

LATCH

R

R

Q

X

Y

Z

+

–

A1

ERROR

AMP

FB

V

100kHz

OSCILLATOR

ANALOG

MULTIPLIER

XY

Z

FREQ SHIFT

SYNC

G1

PULSE WIDTH

COMPARATOR

24V (EQUIVALENT)

2.21V

SWITCH

OUTPUT

(V

)

0.04

250

500

INPUT SUPPLY

SHUTDOWN*

I

*

6V TO ALL

CIRCUITRY

LIM

Ω

Ω

SW

Ω

Ω

C

LT1074 • BD01

100

SWITCH

OUTPUT (V

)

0.1

Ω

SW

Ω

3V(p-p)

LT1076

LT1074

*AVAILABLE ON PACKAGES WITH PIN

COUNTS GREATER THAN 5.

BLOCK DIAGRA