LT1947 Adjustable Output TFT-LCD Triple Switching Regulator

The LT®1947 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

产品特点 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

参数

应用

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

典型应用图

LT1947 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT1947EMS	MSOP	10	E	$3.08	$2.60
LT1947EMS#PBF	MSOP	10	E	$3.08	$2.60
LT1947EMS#TR	MSOP	10	E		$2.66
LT1947EMS#TRPBF	MSOP	10	E		$2.66
LT1947EMSE	MSOP	10	E	$3.08	$2.60
LT1947EMSE#PBF	MSOP	10	E	$3.08	$2.60
LT1947EMSE#TR	MSOP	10	E		$2.66
LT1947EMSE#TRPBF	MSOP	10	E		$2.66

LT1947 数据手册及相关资料下载

数据手册(英文) : LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator.PDF
可靠性数据 : R365 Reliability Data .PDF