LTC4352HMS#TRPBF

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Analog Devices Inc./Maxim Integrated

LOW VOLTAGE IDEAL DIODE CONTROLLER WITH MONITORING

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LTC4352HMS#TRPBF

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Analog Devices Inc./Maxim Integrated

LOW VOLTAGE IDEAL DIODE CONTROLLER WITH MONITORING

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC4352 Series

The LTC4352 creates a near-ideal diode using an external N-channel MOSFET. It replaces a high power Schottky diode and the associated heat sink, saving power and board area. The ideal diode function permits low loss power ORing and supply holdup applications.The LTC4352 regulates the forward voltage drop across the MOSFET to ensure smooth current transfer in diode-OR applications. A fast turn-on reduces the load voltage droop during supply switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse currents.The controller operates with supplies from 2.9V to 18V. For lower voltages, an external supply is needed at the VCCpin. Power passage is disabled during undervoltage or overvoltage conditions. The controller also features an open MOSFET detect circuit that ﬂags excessive voltage drop across the pass transistor in the on state. A REV pin enables reverse current, overriding the diode behavior when desired.ApplicationsRedundant Power SuppliesSupply HoldupTelecom InfrastructureComputer Systems and Servers

Technical Specifications

Parameters and characteristics for this part

Specification	LTC4352HMS#TRPBF

Applications	Telecom Infrastructure, Redundant Power Supplies
Current - Supply	1.4 mA
Delay Time - OFF	200 ns
Delay Time - ON	250 ns
FET Type	N-Channel
Internal Switch(s)	No
Mounting Type	Surface Mount
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Package Length	0.118 in
Package Name	12-MSOP, 12-TSSOP
Package Width	3 mm
Ratio - Input:Output	N:1
Type	N+1 ORing Controller
Voltage - Supply (Maximum)	18 V
Voltage - Supply (Minimum)	2.9 V

LTC4352 Series

Low Voltage Ideal Diode Controller with Monitoring

Part	FET Type	Delay Time - OFF	Applications	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Delay Time - ON	Current - Supply	Package / Case	Internal Switch(s)	Type	Package Width	Package Name	Package Length	Ratio - Input:Output	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)
Analog Devices Inc./Maxim Integrated LTC4352CDD#TRPBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	70 °C	0 °C	Surface Mount	250 ns	1.4 mA	12-WFDFN Exposed Pad	No	N+1 ORing Controller	3 mm	12-DFN	3 mm	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352HDD#TRPBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	150 °C	-40 °C	Surface Mount	250 ns	1.4 mA	12-WFDFN Exposed Pad	No	N+1 ORing Controller	3 mm	12-DFN	3 mm	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352CDD#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	70 °C	0 °C	Surface Mount	250 ns	1.4 mA	12-WFDFN Exposed Pad	No	N+1 ORing Controller	3 mm	12-DFN	3 mm	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352IDD#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	85 °C	-40 °C	Surface Mount	250 ns	1.4 mA	12-WFDFN Exposed Pad	No	N+1 ORing Controller	3 mm	12-DFN	3 mm	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352CMS#TRPBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	70 °C	0 °C	Surface Mount	250 ns	1.4 mA		No	N+1 ORing Controller	3 mm	12-MSOP 12-TSSOP	0.118 in	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352HMS#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	150 °C	-40 °C	Surface Mount	250 ns	1.4 mA		No	N+1 ORing Controller	3 mm	12-MSOP 12-TSSOP	0.118 in	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352IMS#TRPBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	85 °C	-40 °C	Surface Mount	250 ns	1.4 mA		No	N+1 ORing Controller	3 mm	12-MSOP 12-TSSOP	0.118 in	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352CMS#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	70 °C	0 °C	Surface Mount	250 ns	1.4 mA		No	N+1 ORing Controller	3 mm	12-MSOP 12-TSSOP	0.118 in	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352HDD#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	150 °C	-40 °C	Surface Mount	250 ns	1.4 mA	12-WFDFN Exposed Pad	No	N+1 ORing Controller	3 mm	12-DFN	3 mm	N:1	18 V	2.9 V
Analog Devices Inc./Maxim Integrated LTC4352IMS#PBF	N-Channel	200 ns	Redundant Power Supplies Telecom Infrastructure	85 °C	-40 °C	Surface Mount	250 ns	1.4 mA		No	N+1 ORing Controller	3 mm	12-MSOP 12-TSSOP	0.118 in	N:1	18 V	2.9 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC4352HMS#TRPBF | Datasheet

Tape and Reel Packaging

R536 Reliability Data