ISL6173DRZA-T【PDF 1/20 页】IC CTRLR HOT SWAP DUAL LV 28-QFN

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FN9186.3

ISL6173

Dual Low Voltage Hot Swap Controller

This IC targets dual voltage hot swap applications across the

+2.5V to +3.3V (nominal) bias supply voltage range with a

second lower voltage rail down to less than 1V. It features a

charge pump for driving external N-Channel MOSFETs,

regulated current protection and duration, output undervoltage

monitoring and reporting, optional latch-off or retry response,

and adjustable soft-start.

The current regulation level (CR) for each rail is set by two

external resistors and each CR duration is set by an external

capacitor on the TIM pin. After the CR duration has expired

the IC then quickly pulls down the associated GATE(s)

output turning off its external FET(s). The ISL6173 offers a

latched output or indefinite auto retry mode of operation.

Pinout

ISL6173 (28 LD QFN) TOP VIEW

Features

" Fast Current Regulation amplifier quickly responds to

overcurrent fault conditions

" Less than 1祍 response Time to Dead Short

" Programmable Current Regulation Level and Duration

" Two Levels of Overcurrent Detection Provide Fast

Response to Varying Fault Conditions

" Overcurrent Circuit Breaker and Fault Isolation functions

" Adjustable Current Regulation Threshold as low as 20mV

" Selectable Latch-off or Auto Retry Response to Fault

conditions

" Adjustable voltage ramp-up for In-rush Protection During

Turn-On

" Rail Independent Control, Monitoring and Reporting I/O

" Dual Supply Hot Swap Power Distribution Control to <1V

" Charge Pump Allows the use of N-Channel MOSFETs

" QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

" Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

" Power Supply Sequencing, Distribution and Control

" Hot Swap/Electronic Breaker Circuits

Ordering Information

PART NUMBER

(Note)

PART

MARKING

TEMP.

RANGE

(癈)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL6173DRZA ISL6173DRZ 0 to +85 28 Ld 5x5 QFN L28.5x5

ISL6173DRZA-T ISL6173DRZ 0 to +85 28 Ld 5x5 QFN

Tape & Reel

L28.5x5

ISL6173EVAL3 Evaluation Platform

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

28 27 26 25 24 23 22

9 10 11 12 13 14

SNS2

VO2

SS2

GT2

FLT2

PG2

CT2

SNS1

VO1

SS1

GT1

FLT1

PG1

CT1

V1(in)

V2(in)

V1(out)

V2(OUT)

Rsns1

Rsns2

FIGURE 1. TYPICAL APPLICATION

ISL6173

EN1

EN2

RTR

/LTCH

BIAS

CPQ+

CPQ-

CPVDD

PGND

GND

CT1 CT2 VS2 SNS2 GT2 VO2

UV2

PG2

FLT2

FLT1

PG1

SS1

SS2

OCREF

GT1 VO1

UV1

VS1 SNS1

Data Sheet

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

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

January 3, 2006

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