LTC4231 Series

Micropower Hot Swap Controller

Catalog

Micropower Hot Swap Controller

Part	Number of Channels	Type	Qualification	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Applications	Supplier Device Package	Grade	Programmable Features	Features	Mounting Type	Current - Supply
Analog Devices LTC4231HMS-1#WPBF	1	Hot Swap Controller	AEC-Q100	36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP	Automotive	Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Latched Fault	Surface Mount
Analog Devices LTC4231HMS-2#WPBF	1	Hot Swap Controller	AEC-Q100	36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP	Automotive	Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Auto Retry	Surface Mount
Analog Devices LTC4231CMS-2#PBF	1	Hot Swap Controller		36 V	2.7 V	0 °C	70 °C	12-TSSOP	General Purpose	12-MSOP		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Auto Retry	Surface Mount	4 µA
Analog Devices LTC4231CMS-1#TRPBF	1	Hot Swap Controller		36 V	2.7 V	0 °C	70 °C	12-TSSOP	General Purpose	12-MSOP		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Latched Fault	Surface Mount	4 µA
Analog Devices LTC4231HMS-1#TRPBF	1	Hot Swap Controller		36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Latched Fault	Surface Mount	4 µA
Analog Devices LTC4231CUD-1#TRPBF	1	Hot Swap Controller		36 V	2.7 V	0 °C	70 °C	12-WFQFN Exposed Pad	General Purpose	12-QFN (3x3)		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Latched Fault	Surface Mount	4 µA
Analog Devices LTC4231HMS-1#WTRPBF	1	Hot Swap Controller	AEC-Q100	36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP	Automotive	Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Latched Fault	Surface Mount
Analog Devices LTC4231HMS-2#TRPBF	1	Hot Swap Controller		36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Auto Retry	Surface Mount	4 µA
Analog Devices LTC4231IUD-2#TRPBF	1	Hot Swap Controller		36 V	2.7 V	-40 °C	85 °C	12-WFQFN Exposed Pad	General Purpose	12-QFN (3x3)		Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Auto Retry	Surface Mount	4 µA
Analog Devices LTC4231HMS-2#WTRPBF	1	Hot Swap Controller	AEC-Q100	36 V	2.7 V	-40 °C	125 °C	12-TSSOP	General Purpose	12-MSOP	Automotive	Circuit Breaker Current Limit Fault Timeout OVP Slew Rate UVLO	Auto Retry	Surface Mount

Catalog

Micropower Hot Swap Controller

Key Features

• 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

Description

The LTC4231 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.The LTC4231 provides a debounce delay and allows the GATE to be ramped up at an adjustable rate. After startup, the LTC4231'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. PullingSHDNlow shuts down the LTC4231 and quiescent current drops to 0.3µA.During an overcurrent fault, the LTC4231 actively limits current while running an adjustable timer. The LTC4231-1 remains off after a current fault while the LTC4231-2 automatically reapplies power after a cool-down period.ApplicationsBattery Powered EquipmentSolar Powered SystemsPortable InstrumentsAutomotive Battery ProtectionEnergy Harvesting