The LTC3786IUD#PBF is a high performance synchronous boost converter controller that drives all N-channel power MOSFETs. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, allowing the LTC3786IUD#PBF to be used in high power boost applications.
A 4.5V to 38V input supply range encompasses a wide range of system architectures and battery chemistries. When biased from the output of the boost converter or another auxiliary supply, the LTC3786IUD#PBF can operate from an input supply as low as 2.5V after start-up. The 55μA no-load quiescent current extends operating run time in battery-powered systems.
The operating frequency can be set for a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL. The LTC3786IUD#PBF also features a precision 1.2V reference and a power good output indicator. The SS pin ramps the output voltage during start-up. The PLLIN/MODE pin selects among Burst Mode® operation, pulse-skipping mode or continuous inductor current mode at light loads.
Feature
- Synchronous Operation For Highest Efficiency and Reduced Heat Dissipation
- Wide VIN Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up
- Output Voltages Up to 60V
- ±1% 1.2V Reference Voltage
- RSENSE or Inductor DCR Current Sensing
- 100% Duty Cycle Capability for Synchronous MOSFET
- Low Quiescent Current: 55μA
- Phase-Lockable Frequency (75kHz to 850kHz)
- Programmable Fixed Frequency (50kHz to 900kHz)
- Adjustable Output Voltage Soft-Start
- Power Good Output Voltage Monitor
- Low Shutdown Current IQ: <8μA
- Internal 5.4V LDO for Gate Drive Supply
- Thermally Enhanced 16-Pin 3mm × 3mm QFN and MSOP Packages
Applications
- Industrial and Automotive Power Supplies
- Automotive Start-Stop Systems
- Medical Devices
- High Voltage Battery-Powered Systems
(Picture: Pinout)
