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40V, 1A Synchronous Step-Down Converter
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LTC3646/LTC3646-1
40V, 1A Synchronous
Step-Down Converter
FEATURES DESCRIPTION Wide Input Voltage Range: 4.0V to 40V
nn 1A Guaranteed Output Current
nn High Efficiency: Up to 95%
nn Wide Output Voltage Range
nn LTC3646: 2.0V to 30V
nn LTC3646-1: 0.6V to 15V
nn ±1% Accurate Reference Voltage
nn Internal or External Compensation
nn Switching Frequency Adjustable and Synchronizable:
200kHz to 3MHz
nn Selectable High Efficiency Burst Mode® Operation or
Forced Continuous Mode
nn 14 Lead 3mm × 4mm DFN or Thermally Enhanced
16-Lead MSOP Packages The LTC®3646 is a high efficiency, step-down DC/DC
converter with internal high side and synchronous power
FETs. It draws only 140µA typical DC supply current in
Burst Mode operation at no load while maintaining output
voltage regulation. nn The LTC3646 can supply up to a 1A load, and its combination of Burst Mode operation, integrated power switches
and low quiescent current provides high efficiency over a
broad range of load currents. Alternatively, it can be used …
