LTC4219 Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LTC4219

5A Integrated Hot Swap Controller

Linear Technology 

Features

nn Small Footprint

nn 33mΩ MOSFET with RSENSE

nn Available in Preset 12V and 5V Versions

nn Adjustable, 10% Accurate Current Limit

nn Current and Temperature Monitor Outputs

nn Overtemperature Protection

nn Adjustable Current Limit Timer Before Fault

nn Power Good and Fault Outputs

nn Adjustable Inrush Current Control

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

Applications

nn RAID Systems

nn Server I/O Cards

nn Industrial

LTC4219

5A Integrated

Hot Swap Controller

Description

The LTC®4219 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 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 of Linear

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

Typical Application

12V, 5A Card Resident Application

VOUT

12V

VDD

OUT

12V

*

12V

+

5A

200k 200k LTC4219DHC-12

330µF

10k 12V

EN1

PG

10k

EN2

FLT

TIMER

ISET

*TVS: DIODES INC. SMAJ17A

INTVCC

IMON

1µF

GND

ADC

20k

4219 TA01a

VIN

10V/DIV

IIN

0.1A/DIV

VOUT

10V/DIV

PG

10V/DIV

Power-Up Waveforms

CONTACT

BOUNCE

20ms/DIV

4219 TA01b

For more information www.linear.com/LTC4219

4219fd

1

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