Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer




The MAX25220/MAX25221 is a 4-channel TFT-LCD pow- er IC that provides symmetrical positive AVDD and nega- tive NAVDD supplies as well as VGON and VGOFF gate supplies. In addition, a VCOM buffer with output voltage range above and below ground and a temperature measurement block are integrated (MAX25221).

The device contains non-volatile memory so that the values of all outputs can be calibrated for the lifetime of the device (maximum five times).

Programming is carried out using the built-in I2C interface, which can also be used to read back diagnostic information. A stand-alone mode is also available.

The temperature sensor interface block measures the temperature optionally allowing the VCOM output voltage to be adjusted depending on the measured temperature.

The MAX25220/MAX25221 is available in a TQFN package and operates in the -40°C to 125°C temperature range.

MAX25220:標準アプリケーション回路 MAX25220:標準アプリケーション回路 拡大表示+


  • High Integration
    • Synchronous Boost Provides AVDD of 4.2V to 10.5V at up to 200mA
    • NAVDD Inverter Output at up to -200mA
    • 15mA VGON Output (7.6V to 20.2V) from 3x Regulated Charge Pump
    • VGOFF (-18.2V to -5.6V) from Regulated Charge Pump at up to -15mA (charge-pump doubler)/li>
    • Controlled Sequencing during Power-On and Power-Off of All Rails
    • VCOM Output Range +1V to -2.49V in 6.83mV Steps (MAX25221)
    • NTC Input for Temperature Measurement/Compensation (MAX25221)
  • Low EMI
    • 420kHz/2.1MHz Switching Frequency with Spread Spectrum
  • I2C Control/Diagnostic Interface with FLTB (Interrupt) Output
    • UV diagnostics on All Outputs
  • Versatile
    • Non-Volatile Output Voltage Settings on AVDD/NAVDD, VGON, VGOFF, VCOM, and Sequencing
    • Supports Stand-Alone Operation Mode after Programming
    • Compact 5mm x 5mm TQFN32 Package
  • ​AECQ100 Grade 1


  • 中央情報ディスプレイ
  • インフォテインメントディスプレイ
  • 計器クラスタ

スペックパラメータを参照する: Multifunction PMICs (83)

Part NumberVIN
# Step-Down Outputs# Step-Up Outputs# Inverting Outputs
MAX25220 NEW!2.65.5221


MAX25221EVKIT: MAX25220、MAX25221の評価キット
MAX25221EVSYS: MAX25220、MAX25221の評価キット
信頼性レポートをリクエスト: MAX25220 
デバイス   ウェハープロセス   プロセス技術   サンプルサイズ   不合格   FIT (25°C)   FIT (55°C)   Material Composition  

注: 不良率はプロセス技術ごとにまとめられ、関連する型番にマッピングされます。 不良率はテストされたユニット数に大きく依存します。

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  • Flexible and Configurable
  • Small Size

Automotive 4-Output Display Power Solution with Watchdog

  • High Integration
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  • Robust and Low EMI

Automotive 4-Channel TFT-LCD Power Supply with VCOM Buffer

  • High Integration
  • Low EMI
  • I2C Control/Diagnostic Interface with FLTB (Interrupt) Output


  • バッテリ充電間のバッテリ使用時間を延長
  • リチウムイオンバッテリ充電の実装が容易
  • 高集積によってソリューション実装面積を最小化

種類 ID タイトル
評価ボード10673MAX25221EVKIT MAX25220MAX25221の評価キット
評価ボード10673MAX25221EVSYS MAX25220MAX25221の評価キット