ADM8839ACP-REEL:  Charge Pump Regulator for Color TFT Panel

The ADM8839 is a charge pump regulator, used for colour TFT (Thin Film Transistor) LCD’s (Liquid Crystal Displays). The device can be used to generate 3 output voltages (+5 V ±2%, +15 V, -15 V) from a single 2.7V - 4.2V (li-ion) input supply, using charge pump technology. These voltages are then used to provide supplies for the LCD controller (5 V ±2%), and the gate drives for the transistors in the panel (+15 V and -15 V). Only a few external capacitors are needed for the charge pumps. An efficient low dropout voltage regulator also ensures that the power efficiency is high and provides a low ripple 5 V output. This LDO can be shutdown and an external LDO used to regulate the 5 V doubler output and to drive the input to the charge pump section which generates the +15 V and -15 V outputs if so required by the user.

The ADM8839 has a power save shutdown feature. The 5 V output consumes the most power, so Power Efficiency is also maximised on this output with an oscillator enabling scheme (Green Idle™). This effectively senses the load current that is flowing and turns on the charge pump only when charge needs to be delivered to the 5 V pump doubler output.

The ADM8839 is fabricated using CMOS technology for minimal power consumption. The part is packaged in a 20- lead LFCSP (Lead Frame Chip Scale Package) with a tiny 4mm x 4mm footprint.

ADM8839ACP-REEL 特点
ADM8839ACP-REEL 功能框图

ADM8839 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
ADM8839-EVALZ 量产 评估板 20 待定
ADM8839ACP 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACP-REEL 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACP-REEL7 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACPZ 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACPZ-REEL 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACPZ-REEL7 量产 20 ld LFCSP (4x4mm) 20 工业
ADM8839ACP-REEL 应用技术支持与电子电路设计开发资源下载
  1. ADM8839 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf