The LTC3646 utilizes internal high-side and synchronous power switches to deliver high efficiency outputs up to 1A. Its internal switching frequency can be programmed between 200kHz and 3.0MHz or synchronized to an external clock. The combination of high efficiency and only 140µA of quiescent current offers high efficiency over a very broad load range. For noise sensitive applications, the LTC3646 can be used in forced continuous operation to minimize voltage ripple.
The standard LTC3646 offers an output range of 2.0V to 30V whereas the LTC3646-1 offers outputs from 0.6V to 15V. Both versions offer additional features including internal soft-start, internal compensation and robust short-circuit protection.
All versions are available from stock.
Summary of Features: LTC3646/-1
- Wide Input Voltage Range: 4.0V to 40V (45V Absolute Maximum)
- 1A Guaranteed Output Current
- High Efficiency: Up to 95%
- Wide Output Voltage Range
- o LTC3646: 2.0V to 30V
- o LTC3646-1: 0.6V to 15V
- 2MHz Constant Frequency Operation with Duty Cycles Down to 6%
- +1% Accurate Reference Voltage
- Internal or External Compensation
- Switching Frequency Adjustable & Synchronizable: 200kHz to 3MHz
- Selectable High Efficiency Burst Mode® Operation or Forced Continuous Mode
- 14 Lead 3mm × 4mm DFN or Thermally Enhanced 16-Lead MSOP Packages