LTC3851AEMSE-1#PBF

LTC3851A-1 is a high performance synchronous step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable frequency of upto 750KHz. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. It features a precision 0.8V reference and a power good indicator. A wide 4V to 38V (40V absolute maximum) input supply range encompasses most battery configurations and intermediate bus voltages. The TK/SS pin ramps the output voltage during start-up and shutdown with coincident or ratiometric tracking. Current foldback limits MOSFET heat dissipation during short-circuit conditions. It is used in application such as automotive systems, telecom systems, industrial equipment, distributed DC power systems etc.

• RSENSE or DCR current sensing, ±1% output voltage accuracy
• Power good output voltage monitor
• Adjustable output voltage soft-start or tracking, output current foldback limiting
• Output overvoltage protection, OPTI-LOOP® compensation minimizes COUT
• Selectable continuous, pulse-skipping or Burst Mode® operation at light loads
• Output voltage range is 0.8V to 5.5V
• Shutdown current is 25µA typical at (VRUN = 0V, TA = 25°C, VIN = 15V, VRUN = 5V)
• Operating temperature is -40°C to 125°C
• Package style is 16-lead plastic MSOP

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