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MAX5951

Part Number	MAX5951
Manufacturer	Maxim Integrated Products
Description	Buck PWM Controller
Published	Jan 26, 2007
Detailed Description	www.DataSheet4U.com 19-0546; Rev 0; 5/06 12V/5V Input Buck PWM Controller General Description The MAX5951 is a 12V pul...
Datasheet	MAX5951 PDF File

Overview

www.
DataSheet4U.
com 19-0546; Rev 0; 5/06 12V/5V Input Buck PWM Controller General Description The MAX5951 is a 12V pulse-width modulated (PWM), step-down, DC-DC controller.
The device operates over the input-voltage range of 8V to 16V or 5V ±10%, and provides an adjustable output from 0.
8V to 5.
5V.
The device delivers up to 10A of load current with excellent load-and-line regulation.
The MAX5951 PWM section utilizes a voltage-mode control scheme for good noise immunity and offers external compensation, allowing for maximum flexibility with a wide selection of inductor values and capacitor types.
The device operates at a fixed switching frequency that is programmable from 100kHz to 1MHz and can be synchronized to an external clock signal though the SYNCIN input.
The device includes undervoltage lockout (UVLO) and digital soft-start.
Protection features include lossless valley-mode current limit, hiccup-mode output short-circuit protection, and thermal shutdown.
The MAX5951 is available in a space-saving 5mm x 5mm, 32-pin thin QFN package and is specified for operation over the -40°C to +85°C extended temperature range.
Refer to the MAX5950 data sheet for a pincompatible PWM controller with hot swap.
Features ♦ 8V to 16V or 5V ±10% Input-Voltage Range ♦ Lossless Valley-Mode Current Sensing ♦ Output Voltage Adjustable from 0.
8V to 5.
5V ♦ Voltage-Mode Control ♦ External Compensation for Maximum Flexibility ♦ Digital Soft-Start ♦ Sequencing or Ratiometric Tracking ♦ Startup Synchronization ♦ Programmable PGOOD Output ♦ Programmable Switching Frequency from 100kHz to 1MHz ♦ External Frequency Synchronization ♦ SYNCIN and SYNCOUT Enable 180° Out-of-Phase Operation ♦ Thermal Shutdown and Short-Circuit Protection ♦ Space-Saving, 5mm x 5mm, 32-Pin TQFN Package MAX5951 Ordering Information PART MAX5951ETJ+ TEMP RANGE -40°C to +85°C PINPACKAGE 32 TQFN PKG CODE T3255-4 Applications PCI-e Express Modules™ General 12V or 5V Input PWM Controllers Blade Servers RAID Base Stati...

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