LTC4210-3CS6 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC4210-3CS6

Hot Swap Controller in 6-Lead SOT-23 Package

Linear Technology 

LTC4210-3/LTC4210-4

Hot Swap Controller in

6-Lead SOT-23 Package

FEATURES

■ Allows Safe Board Insertion and Removal

from a Live Backplane

■ Adjustable Analog Current Limit

with Circuit Breaker

■ Fast Response Limits Peak Fault Current

■ Automatic Retry or Latch Off On Current Fault

■ Adjustable Supply Voltage Power-Up Rate

■ High Side Drive for External MOSFET Switch

■ Controls Supply Voltages from 2.7V to 7V

■ Undervoltage Lockout

■ Adjustable Overvoltage Protection

■ Low Profile (1mm) SOT-23 (ThinSOTTM) Package

U

APPLICATIO S

■ Hot Board Insertion

■ Electronic Circuit Breaker

■ Industrial High Side Switch/Circuit Breaker

DESCRIPTIO

The LTC®4210-3/LTC4210-4 is a 6-pin SOT-23 Hot SwapTM

controller that allows a board to be safely inserted and

removed from a live backplane. An internal high side

switch driver controls the GATE of an external N-channel

MOSFET for a supply voltage ranging from 2.7V to 7V. The

LTC4210 provides the initial timing cycle and allows the

GATE to be ramped up at an adjustable rate.

The LTC4210 features a fast current limit loop providing

active current limiting together with a circuit breaker

timer. The signal at the ON pin turns the part on and off and

is also used for the reset function.

The LTC4210-3 retries on overcurrent fault and the

LTC4210-4 latches off on an overcurrent fault.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

ThinSOT and Hot Swap are trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Single Channel 5V Hot Swap Controller

BACKPLANE PCB EDGE

CONNECTOR CONNECTOR

(FEMALE) (MALE)

VIN

LONG

5V

Z1

10Ω

OPTIONAL

0.1µF

RSENSE

0.01Ω

Q1

Si4410DY

+

VOUT

5V

4A

470µF

VCC SENSE

GATE

100Ω

SHORT 20k

ON LTC4210-3

100Ω

10k

TIMER

GND

0.01µF

0.22µF

LONG

GND

GND

Z1: ISMA10A OR SMAJ10A

4210 TA01

Power-Up Sequence

CLOAD = 470µF

VON

(2V/DIV)

VTIMER

(1V/DIV)

VOUT

(5V/DIV)

10ms/DIV

IOUT

(0.5A/DIV)

4210 TA02

421034fa

1

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