LTC3642IDD-3.3#PBF

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Analog Devices Inc./Maxim Integrated

HIGH EFFICIENCY, HIGH VOLTAGE 50MA SYNCHRONOUS STEP-DOWN CONVERTER

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LTC3642IDD-3.3#PBF

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Analog Devices Inc./Maxim Integrated

HIGH EFFICIENCY, HIGH VOLTAGE 50MA SYNCHRONOUS STEP-DOWN CONVERTER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3642 Series

The LTC3642 is a high efficiency, high voltage step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current at no load while maintaining output voltage regulation.The LTC3642 can supply up to 50mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. The LTC3642’s combination of Burst Mode®operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.With its wide 4.5V to 45V input range and internal overvoltage monitor capable of protecting the part through 60V surges, the LTC3642 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3642 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.The LTC3642 is available in the thermally enhanced 3mm × 3mm DFN and MS8E packages.Applications4mA to 20mA Current LoopsIndustrial Control SuppliesDistributed Power SystemsPortable InstrumentsBattery-Operated DevicesAutomotive Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3642IDD-3.3#PBF

Current - Output	50 mA
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	Fixed
Package / Case	8-WFDFN Exposed Pad
Package Length	3 mm
Package Name	8-DFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	45 V
Voltage - Input (Min)	4.5 V
Voltage - Output (Min/Fixed)	3.3 V

LTC3642 Series

Part	Voltage - Output (Max)	Synchronous Rectifier	Output Type	Current - Output	Voltage - Input (Min)	Package Length	Package Features	Package Name	Package Width	Output Configuration	Operating Temperature (Max)	Operating Temperature (Min)	Topology	Mounting Type	Function	Voltage - Output (Min/Fixed)	Number of Outputs	Voltage - Input (Max)	Package / Case
Analog Devices Inc./Maxim Integrated LTC3642IMS8E#PBF	45 V	Yes	Adjustable	50 mA	4.5 V	0.118 in	Exposed Pad	8-MSOP 8-MSOP-EP 8-TSSOP	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	0.8 V	1	45 V
Analog Devices Inc./Maxim Integrated LTC3642EMS8E-3.3#TRPBF		Yes	Fixed	50 mA	4.5 V	0.118 in	Exposed Pad	8-MSOP 8-MSOP-EP 8-TSSOP	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	3.3 V	1	45 V
Analog Devices Inc./Maxim Integrated LTC3642IDD#TRPBF	45 V	Yes	Adjustable	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	0.8 V	1	45 V	8-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3642IDD-5#TRPBF		Yes	Fixed	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	5 V	1	45 V	8-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3642IDD-3.3#TRPBF		Yes	Fixed	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	3.3 V	1	45 V	8-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3642IMS8E-3.3#TRPBF		Yes	Fixed	50 mA	4.5 V	0.118 in	Exposed Pad	8-MSOP 8-MSOP-EP 8-TSSOP	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	3.3 V	1	45 V
Analog Devices Inc./Maxim Integrated LTC3642EDD#TRPBF	45 V	Yes	Adjustable	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	0.8 V	1	45 V	8-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3642IDD#PBF	45 V	Yes	Adjustable	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	0.8 V	1	45 V	8-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3642IMS8E-5#PBF		Yes	Fixed	50 mA	4.5 V	0.118 in	Exposed Pad	8-MSOP 8-MSOP-EP 8-TSSOP	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	5 V	1	45 V
Analog Devices Inc./Maxim Integrated LTC3642EDD-5#TRPBF		Yes	Fixed	50 mA	4.5 V	3 mm		8-DFN	3 mm	Positive	125 °C	-40 °C	Buck	Surface Mount	Step-Down	5 V	1	45 V	8-WFDFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3642IDD-3.3#PBF | Datasheet

R526 Reliability Data