LT1641-1LT1641-2 Series

Positive High Voltage Hot Swap Controllers

Catalog

Positive High Voltage Hot Swap Controllers

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Applications	Package / Case	Package / Case [y]	Package / Case [x]	Type	Features	Number of Channels	Operating Temperature [Max]	Operating Temperature [Min]	Programmable Features	Supplier Device Package	Current - Supply	Utilized IC / Part	Secondary Attributes	Contents	Primary Attributes	Supplied Contents
Analog Devices LT1641-2IS8#TRPBF	9 V	80 V	Surface Mount	General Purpose	8-SOIC	3.9 mm	0.154 in	Hot Swap Controller	Auto Retry	1	85 °C	-40 °C	Current Limit Fault Timeout OVP Slew Rate UVLO	8-SO	2 mA
Analog Devices LT1641CS8#TRPBF	9 V	80 V	Surface Mount	General Purpose	8-SOIC	3.9 mm	0.154 in	Hot Swap Controller	Auto Retry	1	70 °C	0 °C	Current Limit Fault Timeout OVP Slew Rate UVLO	8-SO	2 mA
Analog Devices LT1641-2IS8#PBF	9 V	80 V	Surface Mount	General Purpose	8-SOIC	3.9 mm	0.154 in	Hot Swap Controller	Auto Retry	1	85 °C	-40 °C	Current Limit Fault Timeout OVP Slew Rate UVLO	8-SO	2 mA
Analog Devices LT1641-1CS8#TRPBF	9 V	80 V	Surface Mount	General Purpose	8-SOIC	3.9 mm	0.154 in	Hot Swap Controller	Latched Fault	1	70 °C	0 °C	Current Limit Fault Timeout OVP Slew Rate UVLO	8-SO	2 mA
Analog Devices DC1354B-C								Power Management								LT1641-1	On-Board LEDs	Board(s)	Latch-Off	Board(s)
Analog Devices LT1641-1CS8#PBF	9 V	80 V	Surface Mount	General Purpose	8-SOIC	3.9 mm	0.154 in	Hot Swap Controller	Latched Fault	1	70 °C	0 °C	Current Limit Fault Timeout OVP Slew Rate UVLO	8-SO	2 mA

Catalog

Positive High Voltage Hot Swap Controllers

Key Features

• Allows Safe Board Insertion and Removal from a Live Backplane

• Controls Supply Voltage from 9V to 80V

• Programmable Analog Foldback Current Limiting

• High Side Drive for an External N-Channel

• Latched Operation Mode (LT1641-1)

• Automatic Retry (LT1641-2)

• User Programmable Supply Voltage Power-Up Rate

• Undervoltage Lockout

• Overvoltage Protection

• Both are available in 8-Lead SO Package

Description

The LT1641 is an 8-pin Hot Swap™controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at a programmable rate. A high side switch driver controls an N-channel gate for supply voltages ranging from 9V to 80V.The chip features a programmable analog foldback current limit circuit. If the chip remains in current limit for more than a programmable time, the N-channel pass transistor turns off and is optionally set to automatically restart after a time-out delay.The PWRGD output indicates when the output voltage, sensed by the FB pin, is within tolerance. The ON pin provides programmable undervoltage lockout.The LT1641-1/LT1641-2 are recommended for new designs.The LT1641 is available in the 8-lead SO package.ApplicationsHot Board InsertionElectronic Circuit BreakerIndustrial High Side Switch/Circuit Breaker24V/48V Industrial/Alarm Systems