LTC4228IUFD-1#PBF

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Analog Devices

HOT SWAP CONTROLLER 2-CH 18V N-CHANNEL POSITIVE VOLTAGE 28-PIN QFN EP TUBE

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LTC4228IUFD-1#PBF

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Analog Devices

HOT SWAP CONTROLLER 2-CH 18V N-CHANNEL POSITIVE VOLTAGE 28-PIN QFN EP TUBE

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Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC4228IUFD-1#PBF

Applications	General Purpose
Current - Supply	2.5 mA
Features	UVLO, Latched Fault
Internal Switch(s)	False
Mounting Type	Surface Mount
Number of Channels [custom]	2
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	28-WFQFN Exposed Pad
Programmable Features	Slew Rate, Current Limit, Fault Timeout
Supplier Device Package	28-QFN (4x5)
Type	Hot Swap Controller, OR Controller
Voltage - Supply [Max]	18 V
Voltage - Supply [Min]	2.9 V

LTC4228-1LTC4228-2 Series

Dual Ideal Diode and Hot Swap Controller

Part	Package / Case	Supplier Device Package	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Programmable Features	Applications	Number of Channels [custom]	Features	Type	Current - Supply
Analog Devices LTC4228CGN-1#TRPBF	28-SSOP	28-SSOP	Surface Mount	2.9 V	18 V	70 °C	0 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Latched Fault UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228CUFD-1#TRPBF	28-WFQFN Exposed Pad	28-QFN (4x5)	Surface Mount	2.9 V	18 V	70 °C	0 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Latched Fault UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228CGN-1#PBF	28-SSOP	28-SSOP	Surface Mount	2.9 V	18 V	70 °C	0 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Latched Fault UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228IUFD-1#PBF	28-WFQFN Exposed Pad	28-QFN (4x5)	Surface Mount	2.9 V	18 V	85 °C	-40 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Latched Fault UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228IGN-2#TRPBF	28-SSOP	28-SSOP	Surface Mount	2.9 V	18 V	85 °C	-40 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Auto Retry UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228CGN-2#TRPBF	28-SSOP	28-SSOP	Surface Mount	2.9 V	18 V	70 °C	0 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Auto Retry UVLO	Hot Swap Controller OR Controller	2.5 mA
Analog Devices LTC4228CUFD-2#PBF	28-WFQFN Exposed Pad	28-QFN (4x5)	Surface Mount	2.9 V	18 V	70 °C	0 °C	Current Limit Fault Timeout Slew Rate	General Purpose	2	Auto Retry UVLO	Hot Swap Controller OR Controller	2.5 mA

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 12.76
		10	$ 9.01
		25	$ 8.04
		100	$ 6.96
		250	$ 6.44
		500	$ 6.12
		1000	$ 5.90

Description

General part information

LTC4228-1LTC4228-2 Series

The LTC4228 offers ideal diode and Hot Swap™functions for two power rails by controlling two external N-channel MOSFETs in each rail. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. Hot Swap control MOSFETs allow boards to be safely inserted and removed from a live backplane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting current limit and internal timed circuit breaker.The LTC4228 regulates the forward voltage drop across the external MOSFETs and sense resistor to ensure smooth current transfer from one supply to the other without oscillation. The ideal diodes turn on quickly to reduce the load voltage droop during supply switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.The LTC4228 allows independent on/off control, and reports fault and power good status for the supply. The LTC4228 improves on the LTC4225 by recovering more quickly from input brownouts to preserve the output voltage.ApplicationsRedundant Power SuppliesMicroTCA Systems and ServersTelecom NetworksPower Prioritizer