company blog about ADI Power Management IC LTC4231IUD-2 Micropower Hot Swap Controller

ADI Power Management IC LTC4231IUD-2 Micropower Hot Swap Controller

Product Description Of LTC4231IUD-2

LTC4231IUD-2 is a micropower Hot Swap controller that allows safe circuit board insertion and removal from a live power supply. An internal high side switch driver controls the gate of an external N-channel MOSFET. Back-to-back MOSFETs can be used for reverse supply protection down to –40V.

LTC4231IUD-2 provides a debounce delay and allows the GATE to be ramped up at an adjustable rate. After startup, the LTC4231IUD-2's quiescent current drops to 4µA during normal operation with output active. UVL, UVH, OV and GNDSW monitor overvoltage and undervoltage periodically, keeping total quiescent current low. Pulling SHDN low shuts down the LTC4231IUD-2 and quiescent current drops to 0.3µA.

During an overcurrent fault, the LTC4231 actively limits current while running an adjustable timer. The LTC4231IUD-2 automatically reapplies power after a cool-down period.

Specifications Of LTC4231IUD-2

Current Limit: Adjustable

Supply Voltage - Max: 36 V

Supply Voltage - Min: 2.7 V

Number of Channels: 1 Channel

Operating Supply Current: 4 uA

Minimum Operating Temperature: - 40 C

Maximum Operating Temperature: + 85 C

Package/Case: QFN-12

Input / Supply Voltage - Max: 36 V

Input / Supply Voltage - Min: 2.7 V

Unit Weight: 157 mg

Feature Of LTC4231IUD-2

Enables Safe Board Insertion and Removal from a Power Supply

4µA Supply Current

0.3µA Shutdown Current

Wide Operating Voltage Range: 2.7V to 36V

Reverse Supply Protection to –40V

Adjustable Analog Current Limit with Circuit Breaker

Automatic Retry or Latchoff on Current Fault

Overvoltage and Undervoltage Monitoring

Controls Single or Back-to-Back N-Channel MOSFETs

12-Lead MSOP and 3mm × 3mm QFN Packages

AEC-Q100 Qualified for Automotive Applications

Applications Of LTC4231IUD-2

Battery Powered Equipment

Solar Powered Systems

Portable Instruments

Automotive Battery Protection

Energy Harvesting

Battery Hot Swap with Reverse Protection

Power-Up Waveforms