LTC4219

1

4219f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

5A 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.

The LTC4219 provides separate inrush current control

and a 10% accurate 5.6A 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

and power good monitoring are also provided. The power

good detection level and foldback current limit profile are

internally preset for 5V (LTC4219-5) and 12V (LTC4219-12)

applications.

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

Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of

their respective owners.

12V, 5A Card Resident Application

× 3mm DFN Packages

Power-Up Waveforms

12V

12V

5A

4219 TA01a

330μF

10k

TIMER

OUT

PG

GND

FLT

LTC4219DHC-12

EN2

EN1

+

20k

0.1μF

10k

ADC

12V

12V

10V/DIV

0.1A/DIV

10V/DIV

PG

10V/DIV

20ms/DIV

4219 TA01b