LTC3646EDE#PBF

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 4V TO 40V SYNCHRONOUS STEP DOWN SINGLE-OUT 2V TO 30V 1A 14-PIN DFN EP TUBE

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LTC3646EDE#PBF

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 4V TO 40V SYNCHRONOUS STEP DOWN SINGLE-OUT 2V TO 30V 1A 14-PIN DFN EP TUBE

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3646LTC3646-1 Series

The LTC3646 is a high efficiency, step-down DC/DC converter with internal high side and synchronous power FETs. It draws only 140μA typical DC supply current in Burst Mode operation at no load while maintaining output voltage regulation.The LTC3646 can supply up to a 1A load, and its combination of Burst Mode operation, integrated power switches and low quiescent current provides high efficiency over a broad range of load currents. Alternatively, it can be used in forced continuous mode for ripple sensitive applications.The LTC3646 has a wide 4.0V to 40V input range and its patented controlled on-time architecture and 0.6V reference voltage allow for large step-down ratios without the risk of output overvoltage. The frequency may be set between 200kHz and 3.0MHz with a program resistor or synchronized to an external clock.The internal soft-start, short-circuit protection and voltage rating make the LTC3646 a robust part ideal for high voltage applications.ApplicationsPoint of Load Power SupplyIntermediate Bus PowerAutomotive Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3646EDE#PBF

Current - Output	1 A
Frequency - Switching (Max)	3 MHz
Frequency - Switching (Min)	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	14-WFDFN Exposed Pad
Package Length	4 mm
Package Name	14-DFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	40 V
Voltage - Input (Min)	4 V
Voltage - Output (Max)	30 V
Voltage - Output (Min/Fixed)	2 V

LTC3646LTC3646-1 Series

40V, 1A Synchronous Step-Down Converter

Part	Package / Case	Voltage - Input (Min)	Operating Temperature (Min)	Operating Temperature (Max)	Synchronous Rectifier	Function	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Output Type	Frequency - Switching (Max)	Frequency - Switching (Min)	Mounting Type	Topology	Output Configuration	Current - Output	Number of Outputs	Voltage - Input (Max)	Package Width	Package Name	Package Length	Package Features
Analog Devices Inc./Maxim Integrated LTC3646IDE#PBF	14-WFDFN Exposed Pad	4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	14-DFN	4 mm
Analog Devices Inc./Maxim Integrated LTC3646IMSE#TRPBF		4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	16-MSOP-EP 16-TFSOP	0.118 in	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3646EDE-1#TRPBF	14-WFDFN Exposed Pad	4 V	-40 °C	150 °C	Yes	Step-Down	0.6 V	15 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	14-DFN	4 mm
Analog Devices Inc./Maxim Integrated LTC3646IMSE#PBF		4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	16-MSOP-EP 16-TFSOP	0.118 in	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3646EMSE#PBF		4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	16-MSOP-EP 16-TFSOP	0.118 in	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3646IDE-1#TRPBF	14-WFDFN Exposed Pad	4 V	-40 °C	150 °C	Yes	Step-Down	0.6 V	15 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	14-DFN	4 mm
Analog Devices Inc./Maxim Integrated LTC3646HMSE#TRPBF		4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	16-MSOP-EP 16-TFSOP	0.118 in	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3646EDE#TRPBF	14-WFDFN Exposed Pad	4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	14-DFN	4 mm
Analog Devices Inc./Maxim Integrated LTC3646IDE#TRPBF	14-WFDFN Exposed Pad	4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	14-DFN	4 mm
Analog Devices Inc./Maxim Integrated LTC3646HMSE#PBF		4 V	-40 °C	150 °C	Yes	Step-Down	2 V	30 V	Adjustable	3 MHz	200 kHz	Surface Mount	Buck	Positive	1 A	1	40 V	3 mm	16-MSOP-EP 16-TFSOP	0.118 in	Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3646EDE#PBF | Datasheet

R526 Reliability Data