Linear Technology LTC3851A-1
The LTC3851A-1 features a precision 0.8V reference and a power good indicator. The TK/SS pin ramps the output voltage during start‑up and shutdown with coincident or ratiometric tracking. 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.| Part No. | LTC3851A-1 |
|---|---|
| Datasheet | LTC3851A-1 Download |
| Manufacturer |  Linear Technology |
| Description | Synchronous Step-Down Switching Regulator Controller |
| Buy | Stock & Price |
FEATURES
n Wide VIN Range: 4V to 38V Operation n RSENSE 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 COUT n Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads n Low Shutdown IQ: 20µA n VOUT Range: 0.8V to 5.5V n Thermally Enhanced 16-Lead MSOP or 3mm × 3mm QFN PackageAPPLICATIONS
n Automotive Systems n Telecom Systems n Industrial Equipment n Distributed DC Power Systems LTC3851A-1 Synchronous Step-Down Switching Regulator ControllerDESCRIPTION
The LTC®3851A-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 up to 750kHz.
