LT3686AEMSE#PBF

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Analog Devices Inc./Maxim Integrated

37V/1.2A STEP-DOWN REGULATOR IN 3MM × 3MM DFN AND MSE

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LT3686AEMSE#PBF

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Analog Devices Inc./Maxim Integrated

37V/1.2A STEP-DOWN REGULATOR IN 3MM × 3MM DFN AND MSE

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3686A Series

The LT3686A is a current mode PWM step-down DC/DC converter with an internal power switch. The wide input range of 3.6V to 37V makes the LT3686A suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high maximum frequency allows the use of tiny inductors and capacitors, resulting in a very small solution. Operating frequency above the AM band avoids interfering with radio reception, making the LT3686A particularly suitable for automotive applications.Cycle-by-cycle current limit, thermal shutdown and DA current sense provide protection against fault conditions. Soft-start and frequency foldback eliminate input current surge during start-up. An optional internal regulated active load at the output via the BD pin keeps the LT3686A at full switching frequency at light loads, resulting in low, predictable output ripple above the audio and AM bands. Internal compensation and an internal boost diode reduce external component count.The LT3686A offers external synchronization capability, whereas the LT3686 does not.Overvoltage ProtectionsFeaturesLT368655V-LT3686A60VExternal SynchronizationApplicationsAutomotive SystemsBattery-Powered EquipmentWall Transformer RegulationDistributed Supply Regulation

Technical Specifications

Parameters and characteristics for this part

Specification	LT3686AEMSE#PBF

Current - Output	1.2 A
Frequency - Switching (Max)	2.5 MHz
Frequency - Switching (Min)	300 kHz
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 Features	Exposed Pad
Package Length	0.118 in
Package Name	12-TSSOP, 12-MSOP-EP
Package Width	3 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Input (Max)	37 V
Voltage - Input (Min)	3.6 V
Voltage - Output (Max)	37 V
Voltage - Output (Min/Fixed)	0.8 V

LT3686A Series

Part	Voltage - Output (Min/Fixed)	Mounting Type	Synchronous Rectifier	Package Name	Number of Outputs	Current - Output	Voltage - Output (Max)	Package Length	Package Features	Package Width	Topology	Output Configuration	Output Type	Voltage - Input (Max)	Frequency - Switching (Min)	Frequency - Switching (Max)	Function	Voltage - Input (Min)	Operating Temperature (Min)	Operating Temperature (Max)	Package / Case
Analog Devices Inc./Maxim Integrated LT3686AHMSE#TRPBF	0.8 V	Surface Mount	No	12-MSOP-EP 12-TSSOP	1	1.2 A	37 V	0.118 in	Exposed Pad	3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3686AEMSE#TRPBF	0.8 V	Surface Mount	No	12-MSOP-EP 12-TSSOP	1	1.2 A	37 V	0.118 in	Exposed Pad	3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C
Analog Devices Inc./Maxim Integrated LT3686AIDD#PBF	0.8 V	Surface Mount	No	10-DFN	1	1.2 A	37 V	3 mm		3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3686AIMSE#PBF	0.8 V	Surface Mount	No	12-MSOP-EP 12-TSSOP	1	1.2 A	37 V	0.118 in	Exposed Pad	3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C
Analog Devices Inc./Maxim Integrated LT3686AEMSE#PBF	0.8 V	Surface Mount	No	12-MSOP-EP 12-TSSOP	1	1.2 A	37 V	0.118 in	Exposed Pad	3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C
Analog Devices Inc./Maxim Integrated LT3686AIDD#TRPBF	0.8 V	Surface Mount	No	10-DFN	1	1.2 A	37 V	3 mm		3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3686AHMSE#PBF	0.8 V	Surface Mount	No	12-MSOP-EP 12-TSSOP	1	1.2 A	37 V	0.118 in	Exposed Pad	3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3686AEDD#PBF	0.8 V	Surface Mount	No	10-DFN	1	1.2 A	37 V	3 mm		3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3686AEDD#TRPBF	0.8 V	Surface Mount	No	10-DFN	1	1.2 A	37 V	3 mm		3 mm	Buck	Positive	Adjustable	37 V	300 kHz	2.5 MHz	Step-Down	3.6 V	-40 °C	125 °C	10-WFDFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT3686AEMSE#PBF | Datasheet

R530 Reliability Data