LTC3639 Series

High Efficiency, 150V 100mA Synchronous Step-Down Regulator

Catalog

High Efficiency, 150V 100mA Synchronous Step-Down Regulator

Part	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Function	Package / Case	Package / Case	Topology	Supplier Device Package	Voltage - Input (Max) [Max]	Number of Outputs	Output Type	Voltage - Input (Min) [Min]	Voltage - Output (Max)	Voltage - Output (Min/Fixed)	Current - Output	Output Configuration
Analog Devices LTC3639HMSE#PBF	Surface Mount	150 °C	-40 °C	Step-Down	0.118 in 3 mm 12	16-TFSOP Exposed Pad	Buck	16-MSOP-EP	150 V	1	Adjustable	4 V	150 V	0.8 V	100 mA	Positive
Analog Devices LTC3639IMSE#PBF	Surface Mount	125 ¯C	-40 °C	Step-Down	0.118 in 3 mm 12	16-TFSOP Exposed Pad	Buck	16-MSOP-EP	150 V	1	Adjustable	4 V	150 V	0.8 V	100 mA	Positive
Analog Devices LTC3639IMSE#TRPBF	Surface Mount	125 ¯C	-40 °C	Step-Down	0.118 in 3 mm 12	16-TFSOP Exposed Pad	Buck	16-MSOP-EP	150 V	1	Adjustable	4 V	150 V	0.8 V	100 mA	Positive
Analog Devices LTC3639MPMSE#TRPBF	Surface Mount	150 °C	-55 °C	Step-Down	0.118 in 3 mm 12	16-TFSOP Exposed Pad	Buck	16-MSOP-EP	150 V	1	Adjustable	4 V	150 V	0.8 V	100 mA	Positive
Analog Devices LTC3639EMSE#PBF	Surface Mount	125 ¯C	-40 °C	Step-Down	0.118 in 3 mm 12	16-TFSOP Exposed Pad	Buck	16-MSOP-EP	150 V	1	Adjustable	4 V	150 V	0.8 V	100 mA	Positive

Catalog

High Efficiency, 150V 100mA Synchronous Step-Down Regulator

Key Features

• Wide Operating Input Voltage Range: 4V to 150V

• Synchronous Operation for Highest Efficiency

• Internal High Side and Low Side Power MOSFETs

• No Compensation Required

• Adjustable 10mA to 100mA Maximum Output Current

• Low Dropout Operation: 100% Duty Cycle

• Low Quiescent Current: 12μA

• Wide Output Range: 0.8V to VIN

• 0.8V ±1% Feedback Voltage Reference

• Precise RUN Pin Threshold

• Internal or External Soft-Start

• Programmable 1.8V, 3.3V, 5V or Adjustable Output

• Few External Components Required

• Programmable Input Overvoltage Lockout

• Thermally Enhanced High Voltage MSOP Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3639 is a high efficiency step-down DC/DC regulator with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load.The LTC3639 can supply up to 100mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3639’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 input range of 4V to 150V and programmable overvoltage lockout, the LTC3639 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC3639 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.The LTC3639 is available in a thermally enhanced high voltage-capable 16-lead MSE package with four missing pins.APPLICATIONSIndustrial Control SuppliesMedical DevicesDistributed Power SystemsPortable InstrumentsBattery-Operated DevicesAutomotiveAvionics