LTC3900IS8#PBF

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Analog Devices Inc./Maxim Integrated

SYNCHRONOUS RECTIFIER DRIVER FOR FORWARD CONVERTERS

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LTC3900IS8#PBF

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Analog Devices Inc./Maxim Integrated

SYNCHRONOUS RECTIFIER DRIVER FOR FORWARD CONVERTERS

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3900 Series

The LTC3900 is a secondary-side synchronous rectifier driver designed to be used in isolated forward converter power supplies. The chip drives N-channel rectifier MOSFETs and accepts pulse sychronization from the primary-side controller via a pulse transformer.The LTC3900 incorporates a full range of protection for the external MOSFETs. A programmable timeout function is included that disables both drivers when the synchronization signal is missing or incorrect. Additionally, the chip senses the output inductor current through the drainsource resistance of the catch MOSFET, shutting off the MOSFET if the inductor current reverses. The LTC3900 also shuts off the drivers if the supply voltage is too low.Applications48V Input Isolated DC/DC ConvertersIsolated Telecom Power SuppliesHigh Voltage Distributed PowerStep-Down ConvertersIndustrial Control System Power SuppliesAutomotive and Heavy Equipment

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3900IS8#PBF

Channel Type	Synchronous
Current - Peak Output (Sink)	2 A
Current - Peak Output (Source)	2 A
Driven Configuration	Low-Side
Fall Time (Typ)	15 ns
Gate Channel	N-Channel
Gate Type	MOSFET
Input Type	Inverting, Non-Inverting
Mounting Type	Surface Mount
Number of Drivers	2
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Package Length	0.154 in
Package Name	8-SO, 8-SOIC
Package Width	3.9 mm
Rise Time (Typ)	15 ns
Voltage - Supply (Maximum)	11 V
Voltage - Supply (Minimum)	4.5 V

LTC3900 Series

Synchronous Rectifier Driver for Forward Converters

Part	Package Name	Package Length	Package Width	Fall Time (Typ)	Rise Time (Typ)	Number of Drivers	Gate Channel	Gate Type	Driven Configuration	Input Type	Mounting Type	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	Current - Peak Output (Sink)	Current - Peak Output (Source)	Channel Type	Operating Temperature (Max)	Operating Temperature (Min)
Analog Devices Inc./Maxim Integrated LTC3900IS8#PBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3900ES8#TRPBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3900MPS8#PBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	150 °C	-55 °C
Analog Devices Inc./Maxim Integrated LTC3900HS8#TRPBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET N-Channel MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	150 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3900HS8#PBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET N-Channel MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	150 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3900ES8#PBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET N-Channel MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3900MPS8#TRPBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	150 °C	-55 °C
Analog Devices Inc./Maxim Integrated LTC3900IS8#TRPBF	8-SO 8-SOIC	0.154 in	3.9 mm	15 ns	15 ns	2	N-Channel	MOSFET	Low-Side	Inverting Non-Inverting	Surface Mount	4.5 V	11 V	2 A	2 A	Synchronous	125 °C	-40 °C

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R368 Reliability Data

LTC3900IS8#PBF | Datasheet