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MAX1748 - Triple-Output TFT LCD DC-DC Converter

General Description

The MAX1748/MAX8726 triple-output DC-DC converters in a low-profile TSSOP package provide the regulated voltages required by active-matrix, thin-film transistor (TFT) liquid-crystal displays (LCDs).

Key Features

  • Three Integrated DC-DC Converters.
  • 1MHz Current-Mode PWM Boost Regulator Up to +13V Main High-Power Output ±1% Accuracy High Efficiency (93%).
  • Dual Charge-Pump Outputs Up to +40V Positive Charge-Pump Output Down to -40V Negative Charge-Pump Output.
  • Internal Supply Sequencing.
  • Internal Power MOSFETs.
  • +2.7V to +5.5V Input Supply.
  • 0.1µA Shutdown Current.
  • 0.6mA Quiescent Current.
  • Internal Soft-Start.
  • Power-Rea.

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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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MAX1748/MAX8726 19-3430; Rev 0; 10/04 EVAALVUAAILTAIOBNLEKIT Triple-Output TFT-LCD DC-DC Converters General Description The MAX1748/MAX8726 triple-output DC-DC converters in a low-profile TSSOP package provide the regulated voltages required by active-matrix, thin-film transistor (TFT) liquid-crystal displays (LCDs). One high-power DC-DC converter and two low-power charge pumps convert the +3.3V to +5V input supply voltage into three independent output voltages. The primary 1MHz DC-DC converter generates a boosted output voltage (VMAIN) up to 13V using ultra-small inductors and ceramic capacitors. The low-power BiCMOS control circuitry and the low on-resistance (0.35Ω) of the integrated power MOSFET allows efficiency up to 93%.