The LTC3769HFE#PBF is a high-performance single output synchronous Boost Converter Controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, simplifying high power boost applications. The 28μA no-load quiescent current extends operating run time in battery-powered systems. A 4.5 to 60V 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 LTC3769 can operate from an input supply as low as 2.3V after start-up. The operating frequency can be set within a 50 to 900kHz range or synchronized to an external clock using the internal PLL. The SS pin ramps the output voltage during start-up. The PLLIN/MODE pin selects burst mode operation, pulse skipping mode or forced continuous mode at light loads.
Synchronous operation for highest efficiency and reduced heat dissipation
Operates down to 2.3V after start-up
±1% 1.2V Reference voltage
RSENSE or inductor DCR current sensing
100% Duty cycle capability for synchronous MOSFET
28μA Low quiescent current
Power good output voltage monitor
4μA Low shutdown current
Internal LDO powers gate drive from VBIAS or EXTVCC
(EN)
