LT3791IFE-1#TRPBF

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Analog Devices Inc./Maxim Integrated

60V 4-SWITCH SYNCHRONOUS BUCK-BOOST CONTROLLER

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LT3791IFE-1#TRPBF

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Analog Devices Inc./Maxim Integrated

60V 4-SWITCH SYNCHRONOUS BUCK-BOOST CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3791-1 Series

The LT3791-1 is a synchronous 4-switch buck-boost voltage/current regulator controller. The controller can regulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3791-1 is ideal for voltage regulator, battery/super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.For new designs we recommend the LT8390: 60V synchronous 4-switch buck-boost controller due to its numerous performance improvements over the LT3791-1.FeaturesLT3791OPEN LED PinLT3791-1Replaces OPEN LED Pin With C/10 Pin Termination FlagApplicationsAutomotive, Telecom, Industrial SystemsHigh Power Battery-Powered System

Technical Specifications

Parameters and characteristics for this part

Specification	LT3791IFE-1#TRPBF

Clock Sync	Yes
Control Features	Frequency Control, Enable, Soft Start
Frequency - Switching (Max)	700 kHz
Frequency - Switching (Min)	200 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package Features	Exposed Pad
Package Length	0.173 in
Package Name	38-TFSOP, 38-TSSOP-EP
Package Width	4.4 mm
Synchronous Rectifier	Yes
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) Maximum	60 V
Voltage - Supply (Vcc/Vdd) Minimum	4.7 V

LT3791-1 Series

Part	Output Configuration	Mounting Type	Control Features	Synchronous Rectifier	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Package Width	Package Features	Package Name	Package Length	Output Phases	Number of Outputs	Function	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Frequency - Switching (Max)	Frequency - Switching (Min)	Topology	Clock Sync
Analog Devices Inc./Maxim Integrated LT3791IFE-1#TRPBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	125 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791IFE-1#PBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	125 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791MPFE-1#TRPBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	150 °C	-55 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791HFE-1#TRPBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	150 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791EFE-1#TRPBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	125 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791EFE-1#PBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	125 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791HFE-1#PBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	150 °C	-40 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT3791MPFE-1#PBF	Positive	Surface Mount	Enable Frequency Control Soft Start	Yes	Transistor Driver	150 °C	-55 °C	4.4 mm	Exposed Pad	38-TFSOP 38-TSSOP-EP	0.173 in	2	2	Step-Down Step-Up	4.7 V	60 V	700 kHz	200 kHz	Buck-Boost	Yes

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R518 Reliability Data

LT3791IFE-1#TRPBF | Datasheet