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MAX1778 - Quad-Output TFT LCD DC/DC Converters

General Description

The MAX1778/MAX1880

MAX1885 multiple-output DC-DC converters provide the regulated voltages required by active matrix thin-film transistor (TFT) liquid crystal displays (LCD) in a low-profile TSSOP package.

Key Features

  • 500kHz/1MHz Current-Mode PWM Step-Up Regulator.
  • Up to +13V Main High-Power Output ±1% Accurate.
  • High Efficiency (91%).
  • Dual Regulated Charge-Pump Outputs (MAX1778/ MAX1880.
  • MAX1882 only).
  • Up to +40V Positive Charge-Pump Output.
  • Up to -40V Negative Charge-Pump Output.
  • Low-Dropout 40mA Linear Regulator (MAX1778/ MAX1881/MAX1883/MAX1884 only).
  • Up to +15V LDO Input.
  • Optional Higher Current with External Tran.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MAX1778/MAX1880–MAX1885 Quad-Output TFT LCD DC/DC Converters with Buffer General Description The MAX1778/MAX1880–MAX1885 multiple-output DC-DC converters provide the regulated voltages required by active matrix thin-film transistor (TFT) liquid crystal displays (LCD) in a low-profile TSSOP package. One high-power step-up converter and two low-power charge pumps convert the 2.7V to 5.5V input voltage into three independent output voltages. A built-in linear regulator and VCOM buffer complete the power-supply requirements. The main step-up converter accurately generates an externally set output voltage up to 13V that can supply the display’s row/column drivers.