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LTC1625 Datasheet

LTC1625 Datasheet

No RSENSE Current Mode Synchronous Step-Down Switching Regulator
Part No.: LTC1625
Page: 24 Pages
Size: 358 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2024-01-15 10:40:40
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LTC1625 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC1625CGN#PBF Tube 100   1 16 0°C ~ 70°C 16-Lead SSOP  
LTC1625CGN#TRPBF Reel 2500   1 16 0°C ~ 70°C 16-Lead SSOP  
LTC1625CGN#TRMPBF Reel 500   1 16 0°C ~ 70°C 16-Lead SSOP  
LTC1625IGN#PBF Tube 100   1 16 -40°C ~ 125°C 16-Lead SSOP  
LTC1625IGN#TRPBF Reel 2500   1 16 -40°C ~ 125°C 16-Lead SSOP  
LTC1625IGN#TRMPBF Reel 500   1 16 -40°C ~ 125°C 16-Lead SSOP  
LTC1625CS#PBF Tube 50   1 16 0°C ~ 70°C 16-Lead SOIC  
LTC1625CS#TRPBF Reel 2500   1 16 0°C ~ 70°C 16-Lead SOIC  
LTC1625CS#TRMPBF Reel 500   1 16 0°C ~ 70°C 16-Lead SOIC  
LTC1625IS#PBF Tube 50   1 16 -40°C ~ 125°C 16-Lead SOIC  
LTC1625IS#TRPBF Reel 2500   1 16 -40°C ~ 125°C 16-Lead SOIC  
LTC1625IS#TRMPBF Reel 500   1 16 -40°C ~ 125°C 16-Lead SOIC  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC1625 Datasheet(PDF)

LTC1625 Datasheet(Picture)

LTC1625 Features

  • Highest Efficiency Current Mode Controller
  • No Sense Resistor Required
  • Stable High Current Operation
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 3.7V to 36V
  • Wide VOUT Range: 1.19V to VIN
  • ±1% 1.19V Reference
  • Programmable Fixed Frequency with Injection Lock
  • Very Low Drop Out Operation: 99% Duty Cycle
  • Forced Continuous Mode Control Pin
  • Optional Programmable Soft Start
  • Pin Selectable Output Voltage
  • Foldback Current Limit
  • Output Overvoltage Protection
  • Logic Controlled Micropower Shutdown: IQ < 30µA
  • Available in 16-Lead Narrow SSOP and SO Packages

LTC1625 Applications

  • Notebook and Palmtop Computers, PDAs
  • Cellular Telephones and Wireless Modems
  • Battery Chargers
  • Distributed Power

LTC1625 Description

The LTC1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range.

Burst Mode operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.

Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 3.7V (3.9V for LTC1625I) to 36V at the input and 1.19V to VIN at the output.

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