LT3680HMSE#TRPBF

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Analog Devices Inc./Maxim Integrated

36V, 3.5A, 2.4MHZ STEP-DOWN SWITCHING REGULATOR WITH 75ΜA QUIESCENT CURRENT

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LT3680HMSE#TRPBF

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Analog Devices Inc./Maxim Integrated

36V, 3.5A, 2.4MHZ STEP-DOWN SWITCHING REGULATOR WITH 75ΜA QUIESCENT CURRENT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3680 Series

The LT3680 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 95mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode®operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3680 can further enhance low output current efficiency by drawing bias current from the output when VOUTis above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUTreaches 91% of the programmed output voltage. The LT3680 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.ApplicationsAutomotive Battery RegulationPower for Portable ProductsDistributed Supply RegulationIndustrial SuppliesWall Transformer Regulation

Technical Specifications

Parameters and characteristics for this part

Specification	LT3680HMSE#TRPBF

Current - Output	3.5 A
Frequency - Switching (Max)	2.45 MHz
Frequency - Switching (Min)	230 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 Features	Exposed Pad
Package Length	0.118 in
Package Name	10-MSOP-EP, 10-MSOP
Package Width	3 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Input (Max)	36 V
Voltage - Input (Min)	3.6 V
Voltage - Output (Max)	30 V
Voltage - Output (Min/Fixed)	0.79 V

LT3680 Series

36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75µA Quiescent Current

Part	Operating Temperature (Max)	Operating Temperature (Min)	Package Width	Package Name	Package Features	Package Length	Number of Outputs	Frequency - Switching (Min)	Frequency - Switching (Max)	Output Type	Output Configuration	Voltage - Output (Max)	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Voltage - Input (Min)	Mounting Type	Topology	Current - Output	Synchronous Rectifier	Function	Package / Case
Analog Devices Inc./Maxim Integrated LT3680EMSE#TRPBF	125 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down
Analog Devices Inc./Maxim Integrated LT3680EDD#TRPBF	125 °C	-40 °C	3 mm	10-DFN		3 mm	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3680IMSE#TRPBF	125 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down
Analog Devices Inc./Maxim Integrated LT3680HMSE#PBF	150 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down
Analog Devices Inc./Maxim Integrated LT3680EMSE#PBF	125 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down
Analog Devices Inc./Maxim Integrated LT3680HMSE#TRPBF	150 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down
Analog Devices Inc./Maxim Integrated LT3680EDD#PBF	125 °C	-40 °C	3 mm	10-DFN		3 mm	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3680IDD#PBF	125 °C	-40 °C	3 mm	10-DFN		3 mm	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3680IDD#TRPBF	125 °C	-40 °C	3 mm	10-DFN		3 mm	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3680IMSE#PBF	125 °C	-40 °C	3 mm	10-MSOP 10-MSOP-EP	Exposed Pad	0.118 in	1	230 kHz	2.45 MHz	Adjustable	Positive	30 V	36 V	0.79 V	3.6 V	Surface Mount	Buck	3.5 A	No	Step-Down

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT3680HMSE#TRPBF | Datasheet

R530 Reliability Data