LTC7819RUJ#PBF

LTC7819 is a high performance triple step-down synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of upto 3MHz. It operates from a wide 4.5V to 40V input supply range. Power loss and supply noise are minimized by operating the three controller output stages out-of-phase. The very low no-load quiescent current extends operating runtime in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. This device features a precision 0.8V reference and power good output indicators. The MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads. It is used in application such as automotive and transportation, industrial, military/avionics etc.

• Triple buck synchronous controllers
• Wide input voltage range is 4.5V to 40V
• VIN current in regulation is 14µA typical
• Spread spectrum operation, RSENSE or DCR current sensing
• Integrated bootstrap supply charge pump
• Programmable frequency is 3MHz typical at (RFREQ = 12Kohm, PLLIN/SPREAD = 0V)
• VIN shutdown current is 1.5µA typical at (RUN1,2,3 = 0V)
• Output voltage operating range is 0.8V to 40V
• Operating temperature is -40°C to 150°C
• Package style is 40-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party