
- Stock: In Stock
- Brand: Unbranded
- Model: 1-CHIP0625
- SKU: 1-CHIP0625
Realtime Stock
Controller IC Chip - LTC3851EUD-1 LDNT chip for laptop- Integrated portable calculator chip(SKU.1-CHIP0625)
The LTC®3851-1 is a high performance synchronous step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage. A con stant frequency current mode architecture allows a phase-lockable frequency of up to 750kHz.OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3851-1 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 confi gurations 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. The MODE/PLLIN pin selects among Burst Mode operation, pulse skipping mode or continuous inductor current mode at light loads and allows the IC to be synchronized to an external clock.The LTC3851-1 is identical to the LTC3851 except that the ILIM pin is replaced by PGOOD
Wide V IN Range: 4V to 38V Operation n R SENSE or DCR Current Sensing n ±1% Output Voltage Accuracy n Power Good Output Voltage Monitor n Phase-Lockable Fixed Frequency: 250kHz to 750kHz n Dual N-Channel MOSFET Synchronous Drive n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Output Voltage Soft-Start or Tracking n Output Current Foldback Limiting n Output Overvoltage Protection n OPTI-LOOP ® Compensation Minimizes C OUT n Selectable Continuous, Pulse-Skipping or Burst Mode ® Operation at Light Loads n Low Shutdown I Q : 20mA n V OUT Range: 0.8V to 5.5V n Thermally Enhanced 16-Lead MSOP or 3mm × 3mm QFN Package
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