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ISL6426CV Datasheet

  • ISL6426CV

  • Single Synchronous Buck Pulse-Width Modulation (PWM) Control...

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ISL6406, ISL6426
Data Sheet
November 1, 2004
FN9073.6
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6406, ISL6426 is an adjustable frequency,
synchronous buck switching regulator optimized for
generating lower voltages for the distributed DC-DC
architectures. The ISL6406 offers an adjustable output
voltage, while the ISL6426 provides a fixed 1.8V output.
Designed to drive N-Channel MOSFETs in synchronous
buck topology, the ISL6406, ISL6426 integrates the control,
output adjustment and protection functions into a single
package.
The ISL6406, ISL6426 provides simple, single feedback
loop, voltage-mode control with fast transient response. The
output voltage can be precisely regulated to as low as 0.8V.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/碌s slew rate which enables high converter
bandwidth for fast transient performance.
Protection from overcurrent conditions is provided by
monitoring the r
DS(ON)
of the upper MOSFET to inhibit PWM
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
The wide programmable switching frequency range of
100kHz to 700kHz allows the use of small surface mount
inductors and capacitors. The device also provides external
frequency synchronization making it an ideal choice for
DC-DC converter applications.
Features
鈥?Operates from 3.3V/5V Input
鈥?0.8V to V
IN
Output Range
- 0.8V Internal Reference
- 鹵1.5% Reference Accuracy
鈥?Simple Single-Loop Control Design
- Voltage-Mode PWM Control
鈥?Fast Transient Response
- High-Bandwidth Error Amplifier
鈥?Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET鈥檚 r
DS(on)
鈥?Programmable Switching Frequency 100kHz鈥?00kHz
鈥?External Frequency Synchronization
鈥?Two Device Options Available
- ISL6406 . . . . . . . . . . . . . . . . Adjustable Output Voltage
- ISL6426 . . . . . . . . . . . . . . . . . . . . . . Fixed 1.8V Output
鈥?Internal Soft-Start
鈥?QFN Package Option
- QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad
Flat No Leads - Product Outline
- QFN Near Chip Scale Package Footprint; Improves
PCB Efficiency, Thinner in Profile
鈥?Pb-Free Packaging Available (RoHS Compliant)
- Designated with 鈥淶鈥?Suffix (Refer to Note)
Applications
鈥?3V/5V DC-DC Converter Modules
鈥?Distributed DC-DC 3.3V, 2.5V and 1.8V Power
Architectures for DSP, Logic, and Memory
鈥?Power Supplies for Microprocessors
- PCs
- Embedded Controllers
鈥?Memory Supplies
鈥?Personal Computer Peripherals
1
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 漏 Intersil Americas Inc. 2003-2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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