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ADM1172:  2.7 V to 16.5 V Hot Swap Controller with Power-Good Comparator

Product Details


The ADM1172 is a Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. This is achieved using a pass FET with a current control loop that monitors the input current using a sense resistor. An internal charge pump is used to enhance the gate of the external high side N-channel FET. When an over current condition is detected the gate voltage of the FET is reduced to limit the current flowing through the sense resistor. The ADM1172 operates with a supply voltage ranging from 2.7V to 16.5V. During an overcurrent condition the timer cap determines the amount of time the FET will remain in this condition. The ON (ON/CLR) pin is the enable input for the device and also acts as a latched fault reset for the ADM1172-2 model. The ADM1172 also features a power fail comparator. The voltage on the PFI pin is compared with an internal 0.6V reference and the output of this comparator is presented on the PFO pin.

This device is available in two options: the ADM1172-1 will automatic retry for over-current fault and the ADM1172-2 will latch-off for an over-current fault. The ADM1172 is packaged in an 8-lead TSOT package

Applications

  • Hot Swap Board Insertion – Line Cards, Raid systems
  • Electronic Circuit Breaker
  • Industrial High Side Switch/Circuit Breaker

FEATURES and BENEFITS

  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Controls Supply Voltages from 2.7 V to 16.5V
  • Power Fail Comparator
  • Adjustable Analog Current Limit with Circuit Breaker
  • Fast Response Limits Peak Fault Current
  • Automatic Retry or Latch-Off On Current Fault
  • Charge Pumped Gate Drive for External N-FET Switch
  • Undervoltage Lockout
  • 8-pin TSOT Package

Typical Application Circuit

Documentation

Title Content Type File Type
ADM1172: 2.7 V to 16.5 V Hot Swap Controller with Power-Fail Comparator Data Sheet (Rev A, 03/2014) (pdf, 222 kB) Data Sheets PDF
Webcast: Hot Swap Design, How to Get it Right
This webcast closely examines the components of a hot swap design and find out what's critical to getting it right.
Webcasts WEBCAST
Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
Hot Swap And Power Monitoring Bulletin  (pdf, 3226 kB) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Hot Swap Controller Simulaton Model
Simulation model to help users simulate their designs with ADM1075, ADM1170/1/2, ADM1275/76 and ADM1278 hot swap controls.
SPICE Models All HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADM1172 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM1172-1AUJZ-RL7 Status: Production 8 ld TSOT 8 Ind Reel, 3000 - $2.02 Y  Material Info PCN Purchase Sample
ADM1172-2AUJZ-RL7 Status: Production 8 ld TSOT 8 Ind Reel, 3000 - $2.02 Y  Material Info PCN Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADM1172 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADM1172EBZ Status: Production Evaluation Board $151.80 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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