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12V PWM Controller with Hot-Swap

Industry's First +12V PWM Controller with Hot-Swap for PCIe® ExpressModule™ Requires No RSENSE for Current Sensing

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet 12V PWM Controller with Hot-Swap Dec 04, 2006

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Sampling:
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Key Features

  • 8V to 16V or 5V ±10% Input-Voltage Range
  • Integrated Hot-Swap Controller
  • 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

Applications/Uses

  • Base Stations
  • Blade Servers
  • General 12V-Input PWM Controllers with Hot-Swap
  • PCIe® ExpressModule™
  • RAID
  • Work Stations

Description

The MAX5950 is a 12V pulse-width modulated (PWM), step-down, DC-DC controller with integrated hot-swap controller. The device operates over the 8V to 16V inputvoltage range 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 MAX5950 is optimized for PCIe® ExpressModule™ power-management application.

The MAX5950 features a hot-swap controller that provides inrush current control during module insertion and removal, as well as short-circuit protection during normal operation. The MAX5950 features an internal charge pump that provides the gate drive for an external n-channel MOSFET. A DCENO logic output indicates the completion of the inrush cycle.

The MAX5950 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 through 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 MAX5950 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 MAX5951 data sheet for a pin-compatible, general-purpose PWM controller.

Simplified Block Diagram

MAX5950: Simplified Block Diagram MAX5950: Simplified Block Diagram Zoom icon

Technical Docs

Data Sheet 12V PWM Controller with Hot-Swap Dec 04, 2006

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.