LTC3639MPMSE#PBF

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.

Applications

• Industrial Control Supplies
• Medical Devices
• Distributed Power Systems
• Portable Instruments
• Battery-Operated Devices
• Automotive

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: 0.8 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