LTC4380H Просмотр технического описания (PDF) - Linear Technology

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LTC4380H

Low Quiescent Current Surge Stopper

Linear Technology 

LTC4380

Pin Functions

VCC pin may be protected by a Zener diode clamp or, in

the case of short duration spikes, by a simple RC filter.

Clamping the VCC pin with a Zener diode can also be used

as a means of adjusting the GATE pin clamp voltage to

a value less than the internal 31.5V or 50V clamps for

the LTC4380-1/LTC4380-2. For the adjustable versions,

LTC4380-3/LTC4380-4, which have no internal gate clamp,

a Zener diode at the VCC pin is the only way to limit the

voltage at the GATE pin.

Block Diagram

Q1

INPUT

RDRN

SEL

VCC

GATE

17V

CHARGE PUMP

REGULATED TO

VOUT + 11.5V

(250kHz)

20µA

13.5V

31.5V*

18.5V*

SNS

DRN

OUT

VCC

7µA, 27µA

MULTIPLIER

IMULT

–

3.4V

+

VCC

4µA

OVERCURRENT VCC

3.5µA

0.1V +

COOL

DOWN

OVERVOLTAGE

–

2µA

*ONLY IN LTC4380-1/LTC4380-2

+

1.215V –

TMR

ON

CONTROL

LOGIC

UV

VMAX RST GOFF

RSNS

SNS

OUT

OUTPUT

50mV/68mV

IA

3.5V

1M ON

1V

VCC

2.2V

FLT

GND

4380 BD

4380f

8

For more information www.linear.com/LTC4380

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