LTC3851A Datasheet PDF | Linear Technology

Linear Technology LTC3851A

The LTC3851A features a precision 0.8V reference that is compatible with a wide 4V to 38V input supply range. The TK/SS pin ramps the output voltage during start‑up. 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
Datasheet	LTC3851A 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 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 5V Internal Regulator 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, 16-Lead Narrow SSOP or 3mm × 3mm QFN Package

APPLICATIONS

n Automotive Systems n Telecom Systems n Industrial Equipment n Distributed DC Power Systems LTC3851A Synchronous Step-Down Switching Regulator Controller

DESCRIPTION

The LTC®3851A 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.