Datasheet Linear Technology LT3791-1

Manufacturer	Linear Technology
Series	LT3791-1

60V 4-Switch Synchronous Buck-Boost Controller

Datasheets

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PDF, 312 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 26
60V 4-Switch Synchronous Buck-Boost Controller

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Packaging

	LT3791EFE-1#PBF	LT3791EFE-1#TRPBF	LT3791HFE-1#PBF	LT3791HFE-1#TRPBF	LT3791IFE-1#PBF	LT3791IFE-1#TRPBF	LT3791MPFE-1#PBF	LT3791MPFE-1#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing
Package Code	FE	FE	FE	FE	FE	FE	FE	FE
Package Index	05-08-1772	05-08-1772	05-08-1772	05-08-1772	05-08-1772	05-08-1772	05-08-1772	05-08-1772
Pin Count	38	38	38	38	38	38	38	38

Parametrics

Parameters / Models	LT3791EFE-1#PBF	LT3791EFE-1#TRPBF	LT3791HFE-1#PBF	LT3791HFE-1#TRPBF	LT3791IFE-1#PBF	LT3791IFE-1#TRPBF	LT3791MPFE-1#PBF	LT3791MPFE-1#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no	no	no	no	no
Features	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect	Resistor Set Frequency, External Synchronization, Input Current Regulation, Output Current Regulation, Input Current Monitor, Output Current Monitor, Output Disconnect
Frequency, kHz	700	700	700	700	700	700	700	700
Frequency Adjust Range	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz
Frequency Sync Range	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz	200kHz - 700kHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, mA	3	3	3	3	3	3	3	3
Max Phases	12	12	12	12	12	12	12	12
Monolithic	no	no	no	no	no	no	no	no
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-55 to 125	-55 to 125
Output Current, A	10	10	10	10	10	10	10	10
Polyphase	yes	yes	yes	yes	yes	yes	yes	yes
Sense Resistor	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck	Buck-Boost, Buck
Vin Max, V	60	60	60	60	60	60	60	60
Vin Min, V	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7
Vout Max, V	60	60	60	60	60	60	60	60
Vout Maximum	60V	60V	60V	60V	60V	60V	60V	60V
Vout Min, V	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2

Eco Plan

	LT3791EFE-1#PBF	LT3791EFE-1#TRPBF	LT3791HFE-1#PBF	LT3791HFE-1#TRPBF	LT3791IFE-1#PBF	LT3791IFE-1#TRPBF	LT3791MPFE-1#PBF	LT3791MPFE-1#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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60V, 4-Switch Synchronous Buck-Boost Controller Regulates Voltage from Wide Ranging Inputs and Charges Batteries at 98.5% Efficiency at 100W+ &mdash LT Journal
PDF, 2.7 Mb, File published: Oct 18, 2012
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60V, 4-Switch Synchronous Buck-Boost Controller Regulates
Voltage from Wide Ranging Inputs and Charges Batteries at
98.5% Efficiency at 100W+
Keith Szolusha The LTВ®3791-1 is a 4-switch synchronous buck-boost DC/DC converter that regulates
both constant voltage and constant current at up to 98.5% efficiency using only a
single inductor. It can deliver well over a hundred watts and features a 60V input
and output rating, making it an ideal DC/DC voltage regulator and battery charger
when both step-up and step-down conversion is needed. In addition to the high
voltage, power and efficiency, it features short-circuit protection, a SYNC pin for
synchronization to an external clock, a CLKOUT pin for driving an external SYNC
pin or for parallel operation, OVLO (overvoltage lockout), SHORT output flag, C/10
detection and output flag for battery chargers, and a CCM pin for discontinuous or
continuous conduction mode. The inclusion of DCM (discontinuous conduction mode)
increases light load efficiency and prevents reverse current when it is undesirable.
120W, 24V 5A OUTPUT BUCK-BOOST
VOLTAGE REGULATOR operates from an input voltage range
of 12V to 58V. Adjustable undervoltage and overvoltage lockout protect
the circuit. It has short-circuit protection and the SHORT output flag indicates The buck-boost converter shown in
FigureВ 1 regulates 24V with 0AвЂ“5A load
at up to 98.5% efficiency (Figure 2). It VIN
12V TO
58V 0.003О©
VIN 1ВµF …

Model Line

Series: LT3791-1 (8)

LT3791EFE-1#PBF LT3791EFE-1#TRPBF LT3791HFE-1#PBF LT3791HFE-1#TRPBF LT3791IFE-1#PBF LT3791IFE-1#TRPBF LT3791MPFE-1#PBF LT3791MPFE-1#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Buck-Boost Regulators > External Power Switch Buck-Boost
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators