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

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 ...More

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

Product Description

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

    • 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

    Diagrams

    ADM1172 Diagram
    Functional Block Diagram for ADM1172

    Specifications

    Other Inputs PFI
    Other Outputs PFO
    Package 8 ld TSOT
    UV & OV Detection ON pin (UV)
    Operating Range(V) 2.7 to 16.5

    Explore Other Products

    Part# Operating Range(V) UV & OV Detection Digital V & I Readback Other Inputs Other Outputs Package Price* (1000-4999)
    ADM1170 1.6 to 16.5 ON pin (UV) - - - 8 ld TSOT $2.13
    ADM1171 2.7 to 16.5 ON pin (UV) - - CS_OUT 8 ld TSOT $2.23
    ADM1172 2.7 to 16.5 ON pin (UV) - PFI PFO 8 ld TSOT $2.02
    ADM1175 3.15 to 16.5 ON pin (UV), ONB pin (OV) I2C Interface, w/ 4 Addreses CONV Pin - 10-Lead MSOP $2.53
    ADM1176 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 16 Addresses - - 10-Lead MSOP $2.53
    ADM1177 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 4 Addreses - - 10-Lead MSOP $2.53
    ADM1178 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 4 Addreses - ALERTB 10-Lead MSOP $2.73
    ADM4210 2.7 to 16.5 ON pin (UV) - - - 6-ld TSOT $3.02

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

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    *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.
    **Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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