MAX8740

NOT RECOMMENDED FOR NEW DESIGNS

TFT-LCD Step-Up DC-DC Converter

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • 90% Efficiency
  • Adjustable Output from VIN to 28V
  • 2.6V to 5.5V Input Supply Range
  • Input Supply Undervoltage Lockout
  • Pin-Programmable 640kHz/1.2MHz Switching Frequency
  • Programmable Soft-Start
  • 0.1µA Shutdown Current
  • Small, 10-Pin Thin DFN Package

    • The MAX8740 is a high-performance, step-up DC-DC converter that provides a regulated supply voltage for active-matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs). The MAX8740 incorporates currentmode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in n-channel power MOSFET to achieve high efficiency and fast transient response.

    Users can select 640kHz or 1.2MHz operation using a logic input pin (FREQ). The high switching frequencies allow the use of ultra-small inductors and low-ESR ceramic capacitors. The current-mode architecture provides fast transient response to pulsed loads. A compensation pin (COMP) gives users flexibility in adjusting loop dynamics. The 30V internal MOSFET can generate output voltages up to 28V from a 2.6V and 5.5V input voltage range. Soft-start slowly ramps the input current and is programmed with an external capacitor.

    The MAX8740 is available in a 10-pin thin DFN package.

    Applications

    • LCD Monitor Panels
    • Notebook Computer Displays
    MAX8740
    TFT-LCD Step-Up DC-DC Converter
    MAX8740: Typical Operating Circuit
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    Documentation

    Data Sheet 1

    Reliability Data 1

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    Hardware Ecosystem

    Parts Product Life Cycle Description
    Switching Regulators & Controllers 2
    MAX1790
    		NOT RECOMMENDED FOR NEW DESIGNS Low-Noise Step-Up DC-DC Converters
    MAX8727
    		TFT-LCD Step-Up DC-DC Converter
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