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LTC3850-1 Datasheet

LTC3850-1 Datasheet

Dual, 2-Phase Synchronous Step-Down Switching Controller
Part No.: LTC3850-1
Page: 38 Pages
Size: 907 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2024-01-15 17:41:39
DataSheet: Download

LTC3850-1 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC3850EGN-1#PBF Tube 49 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850EGN-1#TRPBF Reel 2500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850EGN-1#TRMPBF Reel 500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#PBF Tube 49 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#TRPBF Reel 2500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#TRMPBF Reel 500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850EGN-1#WPBF Tube 49 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850EGN-1#WTRPBF Reel 2500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850EGN-1#WTRMPBF Reel 500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#WPBF Tube 49 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#WTRPBF Reel 2500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
LTC3850IGN-1#WTRMPBF Reel 500 LTC3850GN-1 1 28 -40°C ~85°C 28-Lead Narrow Plastic SSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC3850-1 Datasheet(PDF)

LTC3850-1 Datasheet(Picture)

LTC3850-1 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 24V (30V for LTC3850I) Operation
  • Adjustable Soft-Start Current Ramping or Tracking
  • Foldback Output Current Limiting
  • Power Good Output Voltage Monitor
  • ILIM function replaced with an EXTVCC function, SSOP-28 package only
  • AEC-Q100 Qualified for Automotive Applications

LTC3850-1 Applications

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

LTC3850-1 Description

The LTC3850-1 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 features a precision 0.8V reference and a power good output indicator. A wide 4V to 24V (28V maximum/30V for LTC3850I) 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 LTC3850-1 is available in low profile 28-pin SSOP packages.

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