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MAX1778EVKIT

Evaluation Kit for the MAX1778, MAX1880, MAX1881, MAX1882

Product Details

Key Features

Applications/Uses

Technical Docs

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Key Features

  • +2.7V to +5.5V Input Range
  • Output Voltages
    • +8V, >200mA (Step-Up Switching Regulator)
    • +20V, >10mA (Positive Charge-Pump Regulator)
    • -5V, >20mA (Negative Charge-Pump Regulator)
    • +2.5V, >200mA (LDO Linear Regulator)
    • +4V, >150mA Peak (VCOM Buffer)
  • All Outputs Are Adjustable with Resistors
  • >91% Efficiency
  • Internal MOSFET Switches
  • <1µA (typ) IC Shutdown Current
  • 1MHz Step-Up Switching Regulator Frequency
  • 500kHz Charge-Pump Regulator Switching Frequency
  • Adjustable Fault-Trip Level
  • Low-Profile External Components
  • Built-In Transient Load Tester
  • Surface-Mount Components
  • Fully Assembled and Tested

Applications/Uses

  • TFT LCD Desktop Monitor Panels
  • TFT LCD Notebook Displays

Description

The MAX1778 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains a step-up switching regulator, two charge-pump voltage-regulator circuits, a VCOM buffer, and a low-drop out linear regulator (LDO). The step-up switching circuit is configured for a +8V output that provides up to 250mA of current from a +3.0V supply. The EV kit can be powered from a +2.7V to +5.5V supply.

The positive charge-pump circuit is configured for a +20V output that provides more than 10mA of current. The negative charge-pump circuit is configured for a -5V output and provides more than 20mA of current. Power for both charge-pump inputs is provided from the step-up switching regulator output.

The EV kit also features an LDO linear regulator circuit, which is configured for a +2.5V output that provides more than 200mA of current. Power for the LDO regulator circuit is provided from the input supply. The VCOM buffer provides a +4V output and more than 150mA of peak current. The step-up switching regulator output provides power to the VCOM buffer.

The MAX1778 EV kit demonstrates low quiescent current and high efficiency (over 91%). High-frequency operation (500kHz/1MHz) allows the use of tiny surface-mount components and fast transient response. The MAX1778 TSSOP package (1.1mm max) with low-profile external components allows this circuit to be less than 1.2mm in height. A built-in transient load tester facilitates transient load tests. The MAX1778 EV kit can also be used to evaluate the MAX1880, MAX1881, and MAX1882 ICs.

Technical Docs

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 .