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LTC3630 Step-Down Converter


Linear Technology's LTC3630 high efficiency, 65 V 500 mA synchronous step-down converter


Linear Technology's LTC3630 Step-Down ConverterLinear Technology's LTC3630 is a high efficiency step-down DC/DC converter with internal high side and synchronous power switches that draws only 12 µA typical DC supply current while maintaining a regulated output voltage at no load.

The LTC3630 can supply up to 500 mA 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 LTC3630’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 4 V to 65 V, the LTC3630 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3630 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. A feedback comparator output enables multiple LTC3630s to be paralleled in higher current applications.

The LTC3630 is available in the thermally-enhanced 3 mm x 5 mm DFN and the MSE16 packages.

Features Applications
  • Operating input voltage range: 4 V to 65 V
  • Synchronous operation for highest efficiency
  • Internal high side and low side power MOSFETs
  • Adjustable 50 mA to 500 mA maximum output current
  • Low dropout operation: 100% duty cycle
  • Low quiescent current: 12 µA
  • 0.8 V ±1% feedback voltage reference
  • Precise RUN pin threshold
  • Internal and external soft-start
  • Programmable 1.8 V, 3.3 V, 5 V or Adjustable Output
  • Few External Components Required
  • Industrial Control Supplies
  • Medical Devices
  • Distributed Power Systems
  • Portable Instruments
  • Battery-Operated Devices
  • Automotive
  • Avionics

Digi-Key P/N Manufacturer P/N Description
LTC3630EDHC#PBF-ND LTC3630EDHC#PBF IC BUCK SYNC ADJ 0.5A 16DFN Datasheet
LTC3630EMSE#PBF-ND LTC3630EMSE#PBF IC BUCK SYNC ADJ 0.5A 16MSOP
LTC3630IMSE#PBF-ND LTC3630IMSE#PBF IC BUCK SYNC ADJ 0.5A 16MSOP
LTC3630HDHC#PBF-ND LTC3630HDHC#PBF IC BUCK SYNC ADJ 0.5A 16DFN