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LT1172 Datasheet

LT1172 Datasheet

100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
Part No.: LT1172
Page: 24 Pages
Size: 283 KB
Manufacturer: Linear Technology
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Views: 2
Update Time: 2023-12-06 13:56:56
DataSheet: Download

LT1172 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1172CN8#PBF Tube 50 LT1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CN8#TRPBF Reel   LT1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CN8#TRMPBF Reel   LT1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IN8#PBF Tube 50 LT1172 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IN8#TRPBF Reel   LT1172 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IN8#TRMPBF Reel   LT1172 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CS8#PBF Tube 100 1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CS8#TRPBF Reel 2500 1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CS8#TRMPBF Reel 500 1172 1 8 0°C ~ 70°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IS8#PBF Tube 100 1172I 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IS8#TRPBF Reel 2500 1172I 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172IS8#TRMPBF Reel 500 1172I 1 8 -40°C ~ 125°C 8-Lead PDIP or 8-Lead Plastic SO  
LT1172CQ#PBF Tube 50 LT1172 1 5 0°C ~ 70°C 5-Lead DD  
LT1172CQ#TRPBF Reel 750 LT1172 1 5 0°C ~ 70°C 5-Lead DD  
LT1172CQ#TRMPBF Reel 500 LT1172 1 5 0°C ~ 70°C 5-Lead DD  
LT1172HVCQ#PBF Tube 50 LT1172HV 1 5 0°C ~ 70°C 5-Lead DD  
LT1172HVCQ#TRPBF Reel 750 LT1172HV 1 5 0°C ~ 70°C 5-Lead DD  
LT1172HVCQ#TRMPBF Reel 500 LT1172HV 1 5 0°C ~ 70°C 5-Lead DD  
LT1172HVIQ#PBF Tube 50 LT1172HV 1 5 -40°C ~ 125°C 5-Lead DD  
LT1172HVIQ#TRPBF Reel 750 LT1172HV 1 5 -40°C ~ 125°C 5-Lead DD  
LT1172HVIQ#TRMPBF Reel 500 LT1172HV 1 5 -40°C ~ 125°C 5-Lead DD  
LT1172CSW#PBF Tube 47 LT1172CSW 1 16 0°C ~ 70°C 16-Lead Plastic SO Wide  
LT1172CSW#TRPBF Reel 1000 LT1172CSW 1 16 0°C ~ 70°C 16-Lead Plastic SO Wide  
LT1172CSW#TRMPBF Reel 500 LT1172CSW 1 16 0°C ~ 70°C 16-Lead Plastic SO Wide  
LT1172CT#PBF Tube 50 LT1172 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172CT#TRPBF Reel   LT1172 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172CT#TRMPBF Reel   LT1172 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172HVCT#PBF Tube 50 LT1172HV 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172HVCT#TRPBF Reel   LT1172HV 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172HVCT#TRMPBF Reel   LT1172HV 1 5 0°C ~ 70°C 5-Lead Plastic TO-220  
LT1172CT#06PBF Tube 50   1 5 0°C ~ 70°C 5-Lead TO-220  
LT1172CT#31PBF Tube 50   1 5 0°C ~ 70°C 5-Lead TO-220  
LT1172HVCT#06PBF Tube 50   1 5 0°C ~ 70°C 5-Lead TO-220  
LT1172HVCT#30PBF Tube 50   1 5 0°C ~ 70°C 5-Lead TO-220  
LT1172HVCT#31PBF Tube 50   1 5 0°C ~ 70°C 5-Lead TO-220  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1172 Datasheet(PDF)

LT1172 Datasheet(Picture)

LT1172 Features

  • Wide Input Voltage Range: 3V to 60V
  • Low Quiescent Current: 6mA
  • Internal 5A Switch (2.5A for LT1171, 1.25A for LT1172)
  • Shutdown Mode Draws Only 50μA Supply Current
  • Very Few External Parts Required
  • Self-Protected Against Overloads
  • Operates in Nearly All Switching Topologies
  • Flyback-Regulated Mode Has Fully Floating Outputs
  • Comes in Standard 5-Pin Packages
  • LT1172 Available in 8-Pin MiniDIP and Surface Mount Packages
  • Can Be Externally Synchronized

LT1172 Applications

  • Logic Supply 5V at 10A
  • 5V Logic to ±15V Op Amp Supply
  • Battery Upconverter
  • Power Inverter (+ to –) or (– to +)
  • Fully Floating Multiple Outputs

LT1172 Description

The LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk.” A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators.

The LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation.

The LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50μA typically for standby operation.

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