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
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.
- Hot Swap Board Insertion – Line Cards, Raid systems
- Electronic Circuit Breaker
- Industrial High Side Switch/Circuit Breaker
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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.