LTC3649EUFD#PBF

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Analog Devices Inc./Maxim Integrated

60V, 4A SYNCHRONOUS STEP-DOWN REGULATOR WITH RAIL-TO-RAIL PROGRAMMABLE OUTPUT

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LTC3649EUFD#PBF

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Analog Devices Inc./Maxim Integrated

60V, 4A SYNCHRONOUS STEP-DOWN REGULATOR WITH RAIL-TO-RAIL PROGRAMMABLE OUTPUT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3649 Series

The LTC3649 is a high efficiency 60V, 4A synchronous monolithic step-down regulator. The regulator features a single resistor programmable output voltage, internal compensation and high efficiencies over a wide VOUTrange.The step-down regulator operates from an input voltage range of 3.1V to 60V and provides an adjustable rail-to-rail output range from (VIN– 0.5V) to ground while delivering up to 4A of output current. The switching frequency is also adjusted with an external resistor. A user-selectable mode input is provided to allow the user to trade off ripple noise for efficiency at light loads; Burst Mode operation provides the highest efficiency at light loads, while forced continuous mode provides low output ripple. The MODE/SYNC pin can also be used to allow the user to synchronize the switching frequency to an external clock.The LTC3649 operates with a peak current mode architecture that allows for fast transient response with inherent cycle-to-cycle current limit protection. It also features programmable output current limit, current monitoring and input voltage regulation.ApplicationsIndustrial ApplicationsAutomotive Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3649EUFD#PBF

Current - Output	4 A
Frequency - Switching	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	28-WFQFN Exposed Pad
Package Length	4 mm
Package Name	28-QFN
Package Width	5 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	60 V
Voltage - Input (Min)	3.1 V
Voltage - Output (Max)	55 V
Voltage - Output (Min/Fixed)	0 V

LTC3649 Series

60V, 4A Synchronous Step-Down Regulator with Rail-to-Rail Programmable Output

Part	Voltage - Input (Min)	Number of Outputs	Function	Output Type	Voltage - Output (Min/Fixed)	Output Configuration	Current - Output	Frequency - Switching	Package Width	Package Name	Package Length	Topology	Voltage - Output (Max)	Voltage - Input (Max)	Operating Temperature (Max)	Operating Temperature (Min)	Package / Case	Synchronous Rectifier	Mounting Type	Package Features	Board Type	Supplied Contents	Total Output Count	Non-Isolated Output Count	Regulator Topology	Voltage - Output	Voltage - Output	Voltage - Output (Option 2)	Voltage - Output (Option 1)	Main Purpose	Voltage - Input (Maximum)	Voltage - Input (Minimum)	Contents	Utilized IC / Part
Analog Devices Inc./Maxim Integrated LTC3649EUFD#PBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	5 mm	28-QFN	4 mm	Buck	55 V	60 V	125 °C	-40 °C	28-WFQFN Exposed Pad	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3649EFE#PBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	4.4 mm	28-TSSOP 28-TSSOP-EP	0.173 in	Buck	55 V	60 V	125 °C	-40 °C		Yes	Surface Mount	Exposed Pad
Analog Devices Inc./Maxim Integrated DC2112A				Non-Isolated			4 A	500 kHz													Fully Populated	Board(s)	1	1 count	Buck	3.3 V 5 VDC	3.3V 5V	5 V	3.3 V	DC/DC Step Down	60 V	4 V	Board	LTC3649
Analog Devices Inc./Maxim Integrated LTC3649IUFD#PBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	5 mm	28-QFN	4 mm	Buck	55 V	60 V	125 °C	-40 °C	28-WFQFN Exposed Pad	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3649EFE	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	4.4 mm	28-TSSOP 28-TSSOP-EP	0.173 in	Buck	55 V	60 V	125 °C	-40 °C		Yes	Surface Mount	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3649IFE#PBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	4.4 mm	28-TSSOP 28-TSSOP-EP	0.173 in	Buck	55 V	60 V	125 °C	-40 °C		Yes	Surface Mount	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3649EUFD#TRPBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	5 mm	28-QFN	4 mm	Buck	55 V	60 V	125 °C	-40 °C	28-WFQFN Exposed Pad	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3649IUFD#TRPBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	5 mm	28-QFN	4 mm	Buck	55 V	60 V	125 °C	-40 °C	28-WFQFN Exposed Pad	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated DC2113A				Non-Isolated			4 A	500 kHz															1	1 count	Buck	3.3 V 5 VDC	3.3V 5V	5 V	3.3 V	DC/DC Step Down	60 V	4 V	Board	LTC3649
Analog Devices Inc./Maxim Integrated LTC3649IFE#TRPBF	3.1 V	1	Step-Down	Adjustable	0 V	Positive	4 A	1 MHz	4.4 mm	28-TSSOP 28-TSSOP-EP	0.173 in	Buck	55 V	60 V	125 °C	-40 °C		Yes	Surface Mount	Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3649EUFD#PBF | Datasheet

R526 Reliability Data