Specification	LTC4251-1IS6#TRMPBF

Applications	-48 V
Current - Supply	800 çA
Features	Latched Fault
Internal Switch(s)	False
Mounting Type	Surface Mount
Number of Channels [custom]	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	SOT-23-6 Thin, TSOT-23-6
Programmable Features	Circuit Breaker, UVLO, OVP, Current Limit, Fault Timeout
Supplier Device Package	TSOT-23-6
Type	Hot Swap Controller
Voltage - Supply [Max]	-36 V
Voltage - Supply [Min]	-72 V

LTC4251 Series

Negative Voltage Hot Swap Controllers in SOT-23

Part	Programmable Features	Applications	Supplier Device Package	Package / Case	Number of Channels [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Current - Supply	Features	Mounting Type	Internal Switch(s)	Applications
Analog Devices Inc./Maxim Integrated LTC4251-1CS6#TRMPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	70 °C	0 °C	Hot Swap Controller	-36 V	-72 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251IS6#TRPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	85 °C	-40 C	Hot Swap Controller	-43 V	-75 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251-1CS6#TRPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	70 °C	0 °C	Hot Swap Controller	-36 V	-72 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251-1CS6#TRPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	70 °C	0 °C	Hot Swap Controller	-72 V	-36 V	800 çA	Latched Fault OVP UVLO	Surface Mount	Both
Analog Devices Inc./Maxim Integrated LTC4251IS6#TRMPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	85 °C	-40 C	Hot Swap Controller	-43 V	-75 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251-2IS6#TRPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	85 °C	-40 C	Hot Swap Controller	-43 V	-72 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251CS6#TRMPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	70 °C	0 °C	Hot Swap Controller	-43 V	-75 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251CS6#TRM	Circuit Breaker Current Limit Fault Timeout OVP UVLO		TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	70 °C	0 °C	Hot Swap Controller	-75 V	-43 V	800 çA	Latched Fault	Surface Mount		General Purpose
Analog Devices Inc./Maxim Integrated LTC4251-1IS6#TRPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	85 °C	-40 C	Hot Swap Controller	-36 V	-72 V	800 çA	Latched Fault	Surface Mount
Analog Devices Inc./Maxim Integrated LTC4251-1IS6#TRMPBF	Circuit Breaker Current Limit Fault Timeout OVP UVLO	-48 V	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	1	85 °C	-40 C	Hot Swap Controller	-36 V	-72 V	800 çA	Latched Fault	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 3.40	1m+

Description

General part information

LTC4251 Series

The LTC4251/LTC4251-1/LTC4251-2 negative voltage Hot Swap™controllers allow a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current limiting: a timed circuit breaker, active current limiting and a fast feed forward path that limits peak current under worst-case catastrophic fault conditions.Programmable undervoltage and overvoltage detectors disconnect the load whenever the input supply exceeds the desired operating range. The supply input is shunt regulated, allowing safe operation with very high supply voltages. A multifunction timer delays initial start-up and controls the circuit breaker’s response time.The LTC4251 UV/OV thresholds are designed to match the standard telecom operating range of –43V to –75V. The LTC4251-1 UV/OV thresholds extend the operating range to encompass –36V to –72V. The LTC4251-2 implements a UV threshold of –43V only.UV/OVLTC4251-43V / -75VLTC4251-1-36V / -72VLTC4251-2-43V UV OnlyLTC4251B-43V / -75VLTC4251B-1-36V / -72VLTC4251B-2-43V UV OnlyApplicationsHot Board InsertionElectronic Circuit Breaker–48V Distributed Power SystemsNegative Power Supply ControlCentral Office SwitchingProgrammable Current Limiting CircuitHigh Availability ServersDisk Arrays

Documents

Technical documentation and resources

R427 Reliability Data

Reliability Data

LTC4251-1IS6#TRMPBF | Datasheet

Datasheet