參數(shù)資料
型號: ISL6125
廠商: Intersil Corporation
英文描述: Power Sequencing Controllers
中文描述: 電源順序控制器
文件頁數(shù): 1/16頁
文件大?。?/td> 422K
代理商: ISL6125
1
FN9005.2
ISL6123, ISL6124, ISL6125,
ISL6126, ISL6127, ISL6128
Power Sequencing Controllers
The Intersil ISL6123, ISL6124, ISL6125, ISL6126, ISL6127,
ISL6128 are integrated 4 channel controlled-on/controlled-off
power-supply sequencers with supply monitoring, fault
protection and a “sequence completed” signal (RESET#). For
larger systems, more than 4 supplies can be sequenced by
simply connecting a wire between SYSRESET# pins of
cascaded IC's. The ISL6125 uses 4 open-drain outputs to
control the 4 power supplies, and the other sequencers use a
patented, micropower 7X chargepump to drive 4 external low-
cost NFET switch gates above the supply rail by 5.3V. These
IC's can be biased from any supply 5V down to 1.5V. Individual
product descriptions are below.
The four channel
ISL6123
(ENABLE input),
ISL6124
(ENABLE#
input) and
ISL6125
ICs offer the designer 4 rail 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
ISL6123
has a low power standby mode when it
is disabled, suitable for battery powered applications.
The
ISL6125
operates like the
ISL6124
but instead of charge
pump driven gate drive outputs it has open drain logic outputs
for direct interface to other circuitry.
In contrast to the ISL6123 and ISL6124, with the
ISL6126
, each
of the four channels operates independently so that the various
rails will turn on once its individual input voltage requirements
are met.
The
ISL6127
is a preprogrammed A-B-C-D turn-on and D-C-B-A
turn-off sequenced IC. Once all inputs are in compliance and
ENABLE is asserted the sequencing starts and each subsequent
GATE will turn-on after the previous one completes turning-on.
The
ISL6128
has two groups of two channels each with its
independent I/O and is ideal for voltage sequencing into
redundant capability loads as all four inputs need to be satisfied
prior to turn on but a single group fault is ignored by the other
group.
External resistors provide flexible voltage threshold programming
of monitored rail voltages. Delay and sequencing are provided by
external capacitors for both ramp up and ramp down.
Additional I/O is provided indicating and driving RESET state in
various configurations.
For volume applications, other programmable options and
features can be had. Contact the factory with your needs
.
Ordering Information
TEMP. RANGE (
o
C)
Features
Enables arbitrary turn-on and turn-off sequencing of up to
four power supplies (0.7V - 5V)
Operates from 1.5V 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 daisy-chained to sequence an
infinite number of independent supplies
Glitch immunity
Under voltage lockout for each supply
1μA Sleep State (
ISL6123
)
Active high (
ISL6123
) or low (
ISL6124
) ENABLE# input
Open drain version available (
ISL6125
)
Pre programmed Sequence available (
ISL6127
)
Dual channel groupings (
ISL6128
)
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
Applications
Graphics cards
FPGA/ASIC/microprocessor/PowerPC supply sequencing
Network routers
Telecommunications systems
PART NUMBER
PACKAGE
PKG. DWG. #
ISL6123IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL6124IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL6125IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL6126IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL6127IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL6128IR
-40 to +85
24 Ld 4x4 QFN L24.4x4
ISL612XSEQEVAL1
Evaluation Platform
FIGURE 1. TYPICAL ISL6123 APPLICATION USAGE
AOUT
AIN
BIN
CIN
DIN
BOUT
COUT
DOUT
UVLO_B
UVLO_C
UVLO_A
UVLO_D
A
I
D
D
D
D
D
D
D
D
ENABLE
SYSRST#
GROUND
B
C
D
RESET#
V
DD
G
G
G
G
Data Sheet
January 2004
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004 All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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