LTC3780IG#PBF

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Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK-BOOST, 4V TO 36V, 1 OUTPUT, 99% DUTY CYCLE, 400KHZ, SSOP-24

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LTC3780IG#PBF

Active

Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK-BOOST, 4V TO 36V, 1 OUTPUT, 99% DUTY CYCLE, 400KHZ, SSOP-24

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3780 Series

The LTC3780 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz. With a wide 4V to 30V (36V maximum) input and output range and seamless transfers between operating modes, the LTC3780 is ideal for automotive, telecom and battery-powered systems.The operating mode of the controller is determined through the FCB pin. For boost operation, the FCB mode pin can select among Burst Mode®operation, discontinuous mode and forced continuous mode. During buck operation, the FCB mode pin can select among skip-cycle mode, discontinuous mode and forced continuous mode. Burst Mode operation and skip-cycle mode provide high efficiency operation at light loads while forced continuous mode and discontinuous mode operate at a constant frequency.Fault protection is provided by an output overvoltage comparator and internal foldback current limiting. A power good output pin indicates when the output is within 7.5% of its designed set point.ApplicationsAutomotive SystemsTelecom SystemsDC Power Distribution SystemsHigh Power Battery-Operated DevicesIndustrial Control

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3780IG#PBF

Clock Sync	No
Control Features	Soft Start, Current Limit, Enable, Power Good
Duty Cycle (Max)	99 %
Frequency - Switching (Max)	400 kHz
Frequency - Switching (Min)	200 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package Length	0.209 in
Package Name	24-SSOP
Package Width	5.3 mm
Synchronous Rectifier	Yes
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) Maximum	30 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC3780 Series

Part	Duty Cycle (Max)	Mounting Type	Function	Output Phases	Synchronous Rectifier	Frequency - Switching (Min)	Frequency - Switching (Max)	Operating Temperature (Min)	Operating Temperature (Max)	Package Length	Package Name	Package Width	Clock Sync	Number of Outputs	Topology	Control Features	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Output Configuration	Output Type	Package / Case
Analog Devices Inc./Maxim Integrated LTC3780EG#PBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	85 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780EUH#TRPBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	85 °C	5 mm	32-QFN	5 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver	32-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3780IG#PBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	125 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780EUH	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	85 °C	5 mm	32-QFN	5 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver	32-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3780MPG#TRPBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-55 °C	125 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780IG#TRPBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	125 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780MPG#PBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-55 °C	125 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780IUH#TRPBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	125 °C	5 mm	32-QFN	5 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver	32-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3780EG#TRPBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	85 °C	0.209 in	24-SSOP	5.3 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3780IUH#PBF	99 %	Surface Mount	Step-Down Step-Up	1	Yes	200 kHz	400 kHz	-40 °C	125 °C	5 mm	32-QFN	5 mm	No	1	Buck-Boost	Current Limit Enable Power Good Soft Start	4 V	30 V	Positive	Transistor Driver	32-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R384 Reliability Data

LTC3780IG#PBF | Datasheet