LTC4217

1

4217fc

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

2A Integrated Hot Swap

Controller

applications that allows a board to be safely inserted and

removed from a live backplane. The part integrates a Hot

Swap controller, power MOSFET and current sense resistor

in a single package for small form factor applications. A

dedicated 12V version (LTC4217-12) contains preset 12V

specific thresholds, while the standard LTC4217 allows

adjustable thresholds.

The LTC4217 provides separate inrush current control

and a 5% accurate 2A current limit with foldback cur-

rent limiting. The current limit threshold can be adjusted

dynamically using an external pin. Additional features

include a current monitor output that amplifies the sense

resistor voltage for ground referenced current sensing

and a MOSFET temperature monitor output. Thermal limit,

overvoltage, undervoltage and power good monitoring

are also provided.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

12V, 1.5A Card Resident Application

Protection

5mm

× 3mm DFN Packages

Power-Up Waveforms

ADC

0.1μF

12V

12V

1.5A

20k

4217 TA01a

10k

12V

330μF

UV

OUT

PG

GND

LTC4217DHC-12

TIMER

FLT

AUTO

RETRY

+

10V/DIV

0.1A/DIV

10V/DIV

10V/DIV

25ms/DIV

4217 TA01b