参数资料
| 型号： | ISL8724IRZ |
| 厂商： | Intersil |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY SEQUENCER 24QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 75 |
| 应用： | 电源序列发生器 |
| 电源电压： | 2.5 V ~ 5 V |
| 电流 - 电源： | 270µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
?
ISL8723, ISL8724
Data Sheet
April 22, 2009
FN6413.1
Power Sequencing Controllers
The Intersil ISL8723 and ISL8724 are 4 channel sequencers
controlling the on and off sequence of voltages with
undervoltage 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 follow.
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
TEMP.
Features
? 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
? Undervoltage lockout for each monitored supply voltage
? 30μA Sleep State ( ISL8723 )
? Active high ( ISL8723 ) or low ( ISL8724 ) ENABLE input
? Pb-free (RoHS compliant)
Applications
? Graphics cards
? FPGA/ASIC/microprocessor/PowerPC supply sequencing
? Network Routers
? Telecommunications Systems
Pinout
ISL8723, ISL8724
PART NUMBER
(Note)
PART
MARKING
RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
(24 LD QFN)
TOP VIEW
ISL8723IRZ*
ISL8724IRZ*
87 23IRZ
87 24IRZ
-40 to +85 24 Ld 4x4 QFN L24.4x4
-40 to +85 24 Ld 4x4 QFN L24.4x4
ISL8723EVAL1
Evaluation Platform
24
23
22
21
20
19
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish,
which is 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
E NABLE/
ENABLE
GATE_A
DLY_OFF_C
DLY_OFF_D
1
2
3
4
4mmx4mm
18 DLY_OFF_A
17 UVLO_C
16 DLY_ON_C
15 DLY_ON_D
requirements of IPC/JEDEC J STD-020.
GATE_B
GATE_C
5
6
14 UVLO_D
13 DLY_OFF_B
7
8
9
10
11
12
1
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, 2009. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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