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ISL8724

更新时间： 2024-11-05 04:44:55
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英特矽尔 - INTERSIL 控制器
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15页 276K
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Power Sequencing Controllers

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ISL8724 数据手册

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ISL8723, ISL8724  
®
Data Sheet  
December 21, 2006  
FN6413.0  
Power Sequencing Controllers  
Features  
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.  
• Enables arbitrary turn-on and turn-off sequencing of up to  
four power supplies (0.7V to 5V)  
• Operates from 2.5V to 5V supply voltage  
• Supplies V  
DD  
+5.3V of charge pumped gate drive  
• Adjustable voltage slew rate for each rail  
• Multiple sequencers can be easily daisy-chained to  
sequence an infinite number of independent voltages  
• Glitch immunity  
• Under voltage lockout for each monitored supply voltage  
• 30µA Sleep State (ISL8723)  
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.  
• Active high (ISL8723) or low (ISL8724) ENABLE# input  
• Pb-free plus anneal available (RoHS compliant) QFN  
Package  
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.  
• Graphics cards  
• FPGA/ASIC/microprocessor/PowerPC supply sequencing  
• Network Routers  
• Telecommunications Systems  
Ordering Information  
Pinout  
TEMP.  
RANGE  
(°C)  
PART  
MARKING  
PKG.  
ISL8723, ISL8724  
(24 LD QFN)  
TOP VIEW  
PART NUMBER  
PACKAGE DWG. #  
ISL8723IRZ (Note) 8723IRZ  
ISL8724IRZ (Note) 8724IRZ  
ISL8723IRZ-T (Note) 8723IRZ  
ISL8724IRZ-T (Note) 8724IRZ  
-40 to +85 24 Ld 4x4 QFN L24.4x4  
(Pb-free)  
L24.4x4  
-40 to +85 24 Ld 4x4 QFN L24.4x4  
(Pb-free)  
Tape & Reel  
L24.4x4  
24 23 22 21 20 19  
ENABLE/  
ISL8723EVAL1  
Evaluation Platform  
18 DLY_OFF_A  
1
2
3
4
5
6
ENABLE#  
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.  
17  
16  
15  
GATE_A  
UVLO_C  
DLY_OFF_C  
DLY_OFF_D  
GATE_B  
DLY_ON_C  
DLY_ON_D  
4mmx4mm  
14 UVLO_D  
GATE_C  
13 DLY_OFF_B  
7
8
9
10 11 12  
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.  
Copyright Intersil Americas Inc. 2006. All Rights Reserved.  
1
All other trademarks mentioned are the property of their respective owners.  
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