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LT1947 Datasheet

LT1947 Datasheet

Adjustable Output TFT-LCD Triple Switching Regulator
Part No.: LT1947
Page: 12 Pages
Size: 165 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2024-01-15 11:14:46
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LT1947 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1947EMSE#PBF Tube 50 LTBQW 1 10 -40°C ~ 85°C 10-Lead MSOP  
LT1947EMSE#TRPBF Reel 2500 LTBQW 1 10 -40°C ~ 85°C 10-Lead MSOP  
LT1947EMSE#TRMPBF Reel 500 LTBQW 1 10 -40°C ~ 85°C 10-Lead MSOP  
LT1947EMS#PBF Tube 50 LTUE 1 10 -40°C ~ 85°C 10-Lead MSOP  
LT1947EMS#TRPBF Reel 2500 LTUE 1 10 -40°C ~ 85°C 10-Lead MSOP  
LT1947EMS#TRMPBF Reel 500 LTUE 1 10 -40°C ~ 85°C 10-Lead MSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1947 Datasheet(PDF)

LT1947 Datasheet(Picture)

LT1947 Features

  • Complete Solution Under 1.2mm
  • Develops Three Outputs from a 3.3V or 5V Supply
  • Externally Programmable VON Delay
  • Fixed Frequency Low Noise Outputs
  • All Ceramic Capacitors
  • 3MHz Switching Frequency
  • Fast Transient Response
  • Few External Components Required
  • 2.7V to 8V Input Range
  • Adjustable AVDD and VON Voltages
  • Tiny 10-Lead MSOP and Thermally Enhanced 10-Lead MSOP Packages

LT1947 Applications

  • TFT-LCD Notebook Display Panels
  • TFT-LCD Desktop Monitor Display Panels
  • Digital Cameras
  • Handheld Computers

LT1947 Description

The LT1947 is a highly integrated multiple output DC/DC converter designed for use in TFT-LCD panels. The device contains two independent switching regulators. The main regulator has an adjustable output voltage with an internal 1.1A switch that can generate a boosted voltage as high as 30V. The second regulator’s output is also adjustable up to 30V and can deliver 10mA for positive bias. A simple level-shift charge pump off the main switch node generates the negative bias voltage. An external capacitor sets the delay time from AVDD’s final value to the rising edge at the VON pin. The 3MHz switching frequency allows the use of tiny low profile chip inductors and capacitors throughout, providing a low noise, low cost total solution with all components under 1.2mm in height.

The device operates from an input range of 2.7V to 8V and is available in 10-lead MSOP and thermally enhanced 10-lead MSOP packages.

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