ISL65426MREP Datasheet, PDF (1/3 Pages) Intersil Corporation – Enhanced Product (EP) 6.0A Dual Synchronous Buck Regulator with Integrated MOSFETs

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Data Sheet
ISL65426MREP
October 29, 2007
FN6575.0
Enhanced Product (EP) 6.0A Dual
Synchronous Buck Regulator with
Integrated MOSFETs
The ISL65426MREP is a high efficiency dual output
monolithic synchronous buck converter operating over an
input voltage range of 2.5V to 5.5V. This single chip power
solution provides two output voltages which are selectable or
externally adjustable from 1.2V to 80% of the supply voltage
while delivering up to 6.0A of total combined output current
when used at T_J of +125°C or less. The two PWMs are
synchronized 180° out of phase reducing the RMS input
current and ripple voltage.
The ISL65426MREP switches at a fixed frequency of 1MHz
and utilizes current-mode control with integrated
compensation to minimize the size and number of external
components. The internal synchronous power switches are
optimized for good thermal performance, high efficiency,
and eliminate the need for an external Schottky diode.
A unique power block architecture allows partitioning to
support one of four configuration options. One master
power block is associated with each synchronous converter
channel. Four floating slave power blocks allow the user to
assign them to either channel. Proper external
configuration of the power blocks is verified internally prior
to soft-start initialization.
Independent enable inputs allow for synchronization or
sequencing soft-start intervals of the two converter
channels. A third enable input allows additional sequencing
for multi-input bias supply designs. Individual power good
indicators (PG1, PG2) signal when output voltage is within
regulation window.
The ISL65426MREP integrates protection for both
synchronous buck regulator channels. The fault conditions
include overcurrent, undervoltage, and IC thermal monitor.
High integration contained in a thin Quad Flat No-lead
(QFN) package makes the ISL65426MREP an ideal choice
to power many of today’s small form factor applications. A
single chip solution for large scale digital ICs, like field
programmable gate arrays (FPGA), requiring separate core
and I/O voltages.
Device Information
The specifications for an Enhanced Product (EP) device are
defined in a Vendor Item Drawing (VID), which is controlled
by the Defense Supply Center in Columbus (DSCC). “Hot-
links” to the applicable VID and other supporting application
information are provided on our website.
Features
• Specifications per DSCC VID V62/07639
• Full Mil-Temp Electrical Performance from -55°C to +125°C
• Controlled Baseline with One Wafer Fabrication Site and
One Assembly/Test Site
• Full Homogeneous Lot Processing in Wafer Fab
• Current Density Validated per MIL-PRF-38535
• Full Traceability Through Assembly and Test by
Date/Trace Code Assignment
• Enhanced Process Change Notification
• Enhanced Obsolescence Management
• Eliminates Need for Up-Screening a COTS Component
• High Efficiency of up to 90%
• Fixed Frequency: 1MHz
• Operates From 2.5V to 5.5V Supply
• ±2.0% Reference
• Flexible Output Voltage Options
- Programmable 2-Bit VID Input
- Adjustable Output From 1.2V to 4.0V
• Power Blocks are Rated at:
- 1A typ for T_J < +125°C and VIN Range 4.0V to 5.5V
- 0.7A typ for T_J < +125°C and VIN Range 2.5V to 5.5V
• Ultra-Compact DC/DC Converter Design
• PWMs Synchronized 180° Out of Phase
• Independent Enable Inputs and System Enable
• Independent Output Digital Soft-Start
• Power Good Output Voltage Monitor
• Short-Circuit and Thermal-Overload Protection
• Overcurrent and Undervoltage Protection
Applications
• FPGA, CPLD, DSP, and CPU Core and I/O Voltages
• Point-of-Load Regulation in Distributed Power Systems
Ordering Information
VENDOR PART
NUMBER VENDOR ITEM
(Notes 1, 2)
DRAWING
TEMP.
RANGE
(°C)
PKG.
PACKAGE DWG. #
ISL65426MREP V62/07639-01XB -55 to +125 50 Ld 5x10 L50.5x10
QFN
NOTES:
1. Add -TK suffix for 1000 piece tape and reel. Please refer to TB347 for
details on reel specifications.
2. Devices must be procured to the VENDOR PART NUMBER.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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