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LTC3850-2 Datasheet

LTC3850-2 Datasheet

Dual, 2-Phase Synchronous Step-Down Switching Controller
Part No.: LTC3850-2
Page: 36 Pages
Size: 882 KB
Manufacturer: Linear Technology
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Views: 2
Update Time: 2024-01-19 10:26:03
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LTC3850-2 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC3850IGN-2#PBF Tube 49 LTC3850GN-2 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-2#TRPBF Reel 2500 LTC3850GN-2 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-2#TRMPBF Reel 500 LTC3850GN-2 1 8 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-2#WPBF Tube 49 LTC3850GN-2 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-2#WTRPBF Reel 2500 LTC3850GN-2 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-2#WTRMPBF Reel 500 LTC3850GN-2 1 8 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC3850-2 Datasheet(PDF)

LTC3850-2 Datasheet(Picture)

LTC3850-2 Features

  • Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • High Efficiency: Up to 95%
  • RSENSE or DCR Current Sensing
  • ±1% 0.8V Output Voltage Accuracy
  • Phase-Lockable Fixed Frequency 250kHz to 780kHz
  • Supports Pre-Biased Output
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 4V to 30V Operation
  • Adjustable Soft-Start Current Ramping or Tracking
  • Foldback Output Current Limiting
  • Output Overvoltage Protection
  • Power Good Output Voltage Monitor
  • 28-Pin Narrow SSOP Package
  • AEC-Q100 Qualified for Automotive Applications

LTC3850-2 Applications

  • Notebook and Palmtop Computers
  • Portable Instruments
  • Battery-Operated Digital Devices
  • DC Power Distribution Systems

LTC3850-2 Description

The LTC3850-2 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and supply noise are minimized by operating the two controller output stages out of phase.

OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3850-2 features a precision 0.8V reference and a power good output indicator. A wide 4V to 30V input supply range encompasses most battery chemistries and intermediate bus voltages.

Independent TK/SS pins for each controller ramp the output voltages during start-up. 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 and allows the IC to be synchronized to an external clock.

The LTC3850-2 is identical to the LTC3850-1, except they have different pin assignments.

LTC3850-2 Datasheet Related Parts

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