LT1947

PRODUCTION

Adjustable Output TFT-LCD Triple Switching Regulator

Part Models: 4
1ku List Price: Starting From $3.14

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Overview

Complete Solution Under 1.2mm
Develops Three Outputs from a 3.3V or 5V Supply
Externally Programmable V_ON 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 AV_DD and V_ON Voltages
Tiny 10-Lead MSOP and Thermally Enhanced 10-Lead MSOP Packages

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 AV_DD’s final value to the rising edge at the V_ON 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.

Applications

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

Part Models: 4
1ku List Price: Starting From $3.14

Documentation

Data Sheet 1

LT1947: Adjustable Output TFT-LCD Triple Switching Regulator Data Sheet 08/23/2007

Reliability Data 1

R365 Reliability Data 03/23/2018

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1947EMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1947EMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1947EMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1947EMSE#TRPBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1947EMS#PBF	PRODUCTION
LT1947EMS#TRPBF	PRODUCTION
LT1947EMSE#PBF	PRODUCTION
LT1947EMSE#TRPBF	PRODUCTION
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1947EMS#PBF	PRODUCTION
LT1947EMS#TRPBF	PRODUCTION
LT1947EMSE#PBF	PRODUCTION
LT1947EMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LT1947EMS#PBF	PRODUCTION
LT1947EMS#TRPBF	PRODUCTION
LT1947EMSE#PBF	PRODUCTION
LT1947EMSE#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

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LT1947

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