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MAX1997EVKIT

Evaluation Kit for the MAX1997

Product Details

Key Features

Applications/Uses

Technical Docs

Data Sheet Evaluation Kit for the MAX1997 Mar 05, 2003

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Key Features

  • +2.7V to +5.5V Input Range
  • Output Voltages
    • +9V Output at 250mA (Step-Up Switching Regulator)
    • +20V Output at 10mA (Positive Charge Pump and Linear Regulator)
    • -7V Output at 10mA (Negative Charge Pump and Linear Regulator)
    • +8.6V Output at 30mA (Gamma Reference Regulator)
    • +2.5V Output at 200mA from 2.7V to 3.6V Input (Low-Voltage Logic Supply)
    • +4.3V Output (±300mA Peak Backplane Buffer Output)
  • Up to Three Positive and Three Negative Charge-Pump Stages
  • More than -20V Linear-Regulated Output (Resistor Adjustable)
  • More than +30V Linear-Regulated Output (with Additional Circuitry)
  • Greater than 85% Efficiency (Step-Up Switching Regulator)
  • 375kHz/750kHz/1.5MHz Selectable Step-Up Switching Frequency (Configured for 1.5MHz)
  • Programmable Power-Up Sequencing and Soft-Start for All Outputs
  • Multilevel Protection
    • Output Undervoltage Protection
    • Input Overcurrent Protection
    • Input Switch Disconnects Step-Up Output from Input Source
    • Selectable Fault-Delay Period
  • Low-Profile Surface-Mount Components
  • Fully Assembled and Tested

Applications/Uses

  • Car-Navigation Displays
  • LCD Monitors
  • Notebook Computer Displays

Description

The MAX1997 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that provides voltages and features required for active-matrix thin-film transistor (TFT) liquid-crystal displays. The EV kit contains a step-up switching regulator, a positive three-stage charge pump and linear regulator for the TFT gate-on supply, a negative three-stage charge pump and linear regulator for the TFT gate-off supply, a gamma reference, a low-voltage logic supply, and a high-current backplane buffer. The gate-on supply, gate-off supply, and gamma reference supply can be sequenced in any power-up order.

The EV kit operates from a DC supply voltage of +2.7V to +5.5V. The step-up switching regulator is configured for a +9V output providing up to 250mA. The positive charge pump and regulator are configured for a +20V output using two charge-pump stages providing up to 10mA. The negative charge pump and regulator are configured for a -7V output using a single charge-pump stage providing up to 10mA. The gamma reference is configured for +8.6V providing up to 10mA. The low-voltage logic linear-regulator is configured for +2.5V, providing up to 200mA. The backplane buffer is configured for +4.3V and can source or sink current peaks more than 300mA.

The MAX1997 EV kit demonstrates low-quiescent current and high efficiency (85%) for maximum battery life. The EV kit features overload protection for the input and all outputs. Operation at 1.5MHz allows the use of tiny surface-mount components. The MAX1997 QFN package (0.8mm max) with low-profile external components allows this circuit to be less than 1.25mm high.

Technical Docs

Data Sheet Evaluation Kit for the MAX1997 Mar 05, 2003

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .