ISL8724 Intersil Corporation, ISL8724 Datasheet

ISL8724

Manufacturer Part Number

ISL8724

Description

(ISL8723 / ISL8724) Power Sequencing Controllers

Manufacturer

Intersil Corporation

Datasheet

1.ISL8724.pdf (15 pages)

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Power Sequencing Controllers

The Intersil ISL8723 and ISL8724 are 4 channel sequencers

controlling the on and off sequence of voltages with under

voltage supply fault protection and a “sequence completed”

signal (RESET#). For larger systems, more than 4 voltages

can be sequenced by a simple connection of multiple IC's.

These sequencers use an integrated charge pump to drive 4

external low-cost N-channel MOSFET switch gates above

the IC bias voltage by 5.3V. These IC's can be biased from

and control any supply from 2.5V to 5V and additionally

monitor any voltage above 0.7V. Individual product

descriptions are below.

The four channel ISL8723 (ENABLE input), ISL8724

(ENABLE# input) offer the designer 4 voltage control when it

is required that all four rails are in minimal compliance prior

to turn on and that compliance must be maintained during

operation. The ISL8723 has a low power standby mode

when it is disabled suitable for battery powered applications.

External resistors provide flexible voltage threshold

programming of monitored voltages. Delay and sequencing

timing are programmable by external capacitors for both

ramp up and ramp down.

Ordering Information

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.

ISL8723IRZ (Note)

ISL8724IRZ (Note)

ISL8723IRZ-T (Note) 8723IRZ

ISL8724IRZ-T (Note) 8724IRZ

ISL8723EVAL1

PART NUMBER

8723IRZ

8724IRZ

Evaluation Platform

MARKING

PART

-40 to +85 24 Ld 4x4 QFN

RANGE

TEMP.

(°C)

Data Sheet

(Pb-free)

Tape & Reel

PACKAGE

L24.4x4

1-888-INTERSIL or 1-888-468-3774

DWG. #

PKG.

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

Features

• Enables arbitrary turn-on and turn-off sequencing of up to

• Operates from 2.5V to 5V supply voltage

• Supplies V

• Adjustable voltage slew rate for each rail

• Multiple sequencers can be easily daisy-chained to

• Glitch immunity

• Under voltage lockout for each monitored supply voltage

• 30µA Sleep State (ISL8723)

• Active high (ISL8723) or low (ISL8724) ENABLE# input

• Pb-free plus anneal available (RoHS compliant) QFN

Applications

• Graphics cards

• FPGA/ASIC/microprocessor/PowerPC supply sequencing

• Network Routers

• Telecommunications Systems

Pinout

December 21, 2006

four power supplies (0.7V to 5V)

sequence an infinite number of independent voltages

Package

DLY_OFF_C

DLY_OFF_D

ENABLE#

ENABLE/

GATE_A

GATE_B

GATE_C

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

Intersil (and design) is a registered trademark of Intersil Americas Inc.

+5.3V of charge pumped gate drive

ISL8723, ISL8724

(24 LD QFN)

TOP VIEW

4mmx4mm

ISL8723, ISL8724

FN6413.0

DLY_OFF_A

UVLO_C

DLY_ON_C

DLY_ON_D

UVLO_D

DLY_OFF_B

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