LT1943 High Current Quad Output Regulator for TFT LCD Panels
The LT®1943 quad output adjustable switching regulator provides power for large TFT LCD panels. The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel. Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output VLOGIC with up to 2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage.
All switchers are synchronized to an internal 1.2MHz clock, allowing the use of low profile inductors and ceramic capacitors throughout. A current mode architecture provides excellent transient response. For best flexibility, all outputs are adjustable. Soft-start is included in all four channels. A PGOOD pin can drive an optional PMOS pass device to provide output disconnect for the AVDD output.
产品特点 Features
参数 |
应用
典型应用图 |
LT1943 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) * |
| LT1943EFE | TSSOP | 28 | E | $7.50 | $5.25 |
| LT1943EFE#PBF | TSSOP | 28 | E | $7.50 | $5.25 |
| LT1943EFE#TR | TSSOP | 28 | E | $5.37 | |
| LT1943EFE#TRPBF | TSSOP | 28 | E | $5.37 |
LT1943 数据手册及相关资料下载
- 数据手册(英文) : LT1943 - High Current Quad Output Regulator for TFT LCD Panels.PDF
- 设计要点 (英文) : DN349 - Quad Output Switching Converter Provides Power for Large TFT LCD Panels.PDF
- 可靠性数据 : R365 Reliability Data .PDF
