LT1640A Series

Negative Voltage Hot Swap Controller

Catalog

Negative Voltage Hot Swap Controller

Part	Current - Supply	Mounting Type	Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case	Package / Case	Number of Channels	Applications	Programmable Features	Supplier Device Package	Features	Package / Case [y]	Package / Case [x]
Analog Devices LT1640LCN8#PBF	1.3 mA	Through Hole	Hot Swap Controller	-80 V	-10 V	70 °C	0 °C	0.3 in	8-DIP	7.62 mm	1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-PDIP	Auto Retry
Analog Devices LT1640ALCS8#TRPBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	70 °C	0 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in
Analog Devices LT1640ALCN8#PBF	1.3 mA	Through Hole	Hot Swap Controller	-80 V	-10 V	70 °C	0 °C	0.3 in	8-DIP	7.62 mm	1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-PDIP	Auto Retry
Analog Devices LT1640HCN8#PBF	1.3 mA	Through Hole	Hot Swap Controller	-80 V	-10 V	70 °C	0 °C	0.3 in	8-DIP	7.62 mm	1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-PDIP	Auto Retry
Analog Devices LT1640AHCS8#TRPBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	70 °C	0 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in
Analog Devices LT1640ALIS8#PBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	85 °C	-40 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in
Analog Devices LT1640HIS8#TRPBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	85 °C	-40 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in
Analog Devices LT1640AHIS8#TRPBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	85 °C	-40 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in
Analog Devices LT1640HIS8#PBF	1.3 mA	Surface Mount	Hot Swap Controller	-80 V	-10 V	85 °C	-40 °C		8-SOIC		1	-48 V	Circuit Breaker Fault Timeout OVP UVLO	8-SO	Auto Retry	3.9 mm	0.154 in

Catalog

Negative Voltage Hot Swap Controller

Key Features

• Allows Safe Board Insertion and Removal from a Live -48V Backplane

• Operates from -10V to -80V

• Programmable Inrush Current

• Allows 50mA of Reverse Drain Pin Current

• Programmable Electronic Circuit Breaker

• Programmable Overvoltage Protection

• Programmable Undervoltage Lockout

• Power Good Control Output

Description

The LT1640AL/LT1640AH are 8-pin, negative voltage Hot Swap™controllers that allow a board to be safely inserted and removed from a live backplane. Inrush current is limited to a programmable value by controlling the gate voltage of an external N-channel pass transistor. The pass transistor is turned off if the input voltage is less than the programmable undervoltage threshold or greater than the overvoltage threshold. A programmable electronic circuit breaker protects the system against shorts. ThePWRGD(LT1640AL) or PWRGD (LT1640AH) signal can be used to directly enable a power module. The LT1640AL is designed for modules with a low enable input and the LT1640AH for modules with a high enable input.The LT1640AL/LT1640AH are available in 8-pin PDIP and SO packages.ApplicationsCentral Office Switching-48V Distributed Power SystemsNegative Power Supply Control