LTC4224-1LTC4224-2 Series

Compact Dual Low Voltage Hot Swap Controller

Catalog

Compact Dual Low Voltage Hot Swap Controller

Part	Supplier Device Package	Current - Supply	Features	Type	Number of Channels [custom]	Applications	Operating Temperature [Max]	Operating Temperature [Min]	Programmable Features	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Package / Case	Package / Case [x]	Package / Case [x]
Analog Devices LTC4224IDDB-2#TRPBF	10-DFN (3x2)	1.4 mA	Auto Retry Fault Timeout UVLO	Hot Swap Controller	2	General Purpose	85 °C	-40 °C	Current Limit Slew Rate	6 V	1 V	Surface Mount	10-WFDFN Exposed Pad
Analog Devices LTC4224IDDB-1#TRMPBF	10-DFN (3x2)	1.4 mA	Fault Timeout Latched Fault UVLO	Hot Swap Controller	2	General Purpose	85 °C	-40 °C	Current Limit Slew Rate	6 V	1 V	Surface Mount	10-WFDFN Exposed Pad
Analog Devices LTC4224IMS-2#PBF	10-MSOP	1.4 mA	Auto Retry Fault Timeout UVLO	Hot Swap Controller	2	General Purpose	85 °C	-40 °C	Current Limit Slew Rate	6 V	1 V	Surface Mount	10-MSOP 10-TFSOP	3 mm	0.118 in
Analog Devices LTC4224CMS-1#TRPBF	10-MSOP	1.4 mA	Fault Timeout Latched Fault UVLO	Hot Swap Controller	2	General Purpose	70 °C	0 °C	Current Limit Slew Rate	6 V	1 V	Surface Mount	10-MSOP 10-TFSOP	3 mm	0.118 in
Analog Devices LTC4224CMS-2#TRPBF	10-MSOP	1.4 mA	Auto Retry Fault Timeout UVLO	Hot Swap Controller	2	General Purpose	70 °C	0 °C	Current Limit Slew Rate	6 V	1 V	Surface Mount	10-MSOP 10-TFSOP	3 mm	0.118 in

Catalog

Compact Dual Low Voltage Hot Swap Controller

Key Features

• Allows Safe Board Insertion and Removal from a Live Backplane

• Controls Load Voltages from 1V to 6V

• No Gate Components Required

• Adjustable Current Limit with Circuit Breaker

• Limits Peak Fault Current in ≤1μs

• No External Timing Capacitor Required

• Adjustable Supply Voltage Power-Up Rate

• Gate Drive for External N-channel MOSFET

• LTC4224-1: Latchoff After Fault

• LTC4224-2: Automatic Retry After Fault

• 10-Lead MSOP and 3mm × 2mm DFN Packages

Description

The LTC4224 Dual Low Voltage Hot Swap™controller allows a board to be safely inserted and removed from a live backplane. It controls two supplies with external N-channel MOSFETs and operates with one supply as low as 1V provided the other supply is 2.7V or greater. The LTC4224 can ramp up the supplies in any order and at adjustable ramp rates. To minimize the number of external components and PCB area, the gate capacitor is optional, all timing delays are generated internally, and theONpins have integrated pull-up currents.Protection against overcurrent faults is provided by a fast-acting current limit and timed circuit breakers. AFAULTpin signals overcurrent faults. The LTC4224-1 remains off after a fault, while the LTC4224-2 automatically tries to apply power again after a four second cool-down period.ApplicationsOptical NetworkingLow Voltage Hot SwapElectronic Circuit Breakers