LTC4232

1

4232fb

For more information www.linear.com/LTC4232

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

5A Integrated Hot Swap

Controller

The LTC®4232 is an integrated solution for Hot Swap™

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 resis-

tor in a single package for small form factor applications.

The LTC4232 provides separate inrush current control

and a 10% accurate 5A 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.

TheLTC4232-1(separatedatasheet)allowsfasterturn-on

than the LTC4232 by providing 16ms debounce delay and

external control of the GATE ramp rate.

12V, 5A Card Resident Application with Auto-Retry

n

Small Footprint

n

n

Wide Operating Voltage Range: 2.9V to 15V

n

Adjustable, 10% Accurate Current Limit

n

Current and Temperature Monitor Outputs

n

Overtemperature Protection

n

Adjustable Current Limit Timer Before Fault

n

Power Good and Fault Outputs

n

Adjustable Inrush Current Control

n

2% Accurate Undervoltage and Overvoltage Protection

n

Pin Compatible with LTC4217 (DFN Package Only)

n

Available in 16-Lead 5mm × 3mm DFN Package

n

RAID Systems

n

Server I/O Cards

n

Industrial

Power-Up Waveforms

10V/DIV

0.1A/DIV

10V/DIV

PG

10V/DIV

25ms/DIV

4232 TA01b

CONTACT

BOUNCE

L

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

Technology Corporation. Hot Swap and PowerPath are trademarks of Linear Technology

Corporation. All other trademarks are the property of their respective owners.

12V

12V

5A

4232 TA01a

330µF

10k

TIMER

UV

OUT

FB

GATE

GND

PG

LTC4232DHC

OV

FLT

+

20k

1µF

ADC

107k

10k

5.23k

150k

20k

*

*DIODES INC. SMAJ22A