Intersil ISL6527CR

Description
The ISL6527 and ISL6527A are single synchronous buck pulse-width modulation (PWM) controllers designed to drive N-channel MOSFETs in a synchronous buck topology. They integrate control, output adjustment, monitoring, and protection functions into a single package. The controllers provide simple, single-loop voltage-mode control with fast transient response. The output voltage can be regulated to as low as the provided external reference. A fixed frequency oscillator reduces design complexity while balancing cost and efficiency.

Features
Operates from 3.3V to 5V input
Utilizes an external reference
Drives N-channel MOSFETs
Simple single-loop control design
Voltage-mode PWM control
Fast transient response
High bandwidth error amplifier
Full 0% to 100% duty cycle
Lossless, programmable overcurrent protection using upper MOSFET's rDS(ON)
Converter can source and sink current
Small converter size
Internal fixed frequency oscillator (300kHz for ISL6527, 600kHz for ISL6527A)
Internal soft-start
Available in 14-lead SOIC or 16-lead, 5x5 QFN packages
QFN package is compliant to JEDEC PUB95 MO-220 QFN (Quad Flat No Leads) package outline, providing a near chip scale package footprint for improved PCB efficiency and a thinner profile
Pb-free plus anneal available (RoHS compliant)

Applications
Power supplies for microprocessors (PCs, embedded controllers)
Subsystem power supplies (PCI/AGP/GTL busses, ACPI power control, DDR SDRAM bus termination supply)
Cable modems, set top boxes, and DSL modems
DSP and core communication processor supplies
Memory supplies
Personal computer peripherals
Industrial power supplies
3.3V input DC/DC regulators
Low voltage distributed power supplies