MAX1889

Triple-Output TFT LCD Power Supply with Fault Protection

Data Sheet (Rev. 1)
Viewing:

Part Details

  • High-Performance Step-Up Regulator
    • Fast Transient Response
    • Current-Mode Control Architecture
    • Built-In High-Efficiency N-Channel Power MOSFET
    • Current-Limit Comparator > 85% Efficiency
    • Selectable Switching Frequency (500kHz/1MHz)
    • Internal Soft-Start
  • Positive Linear-Regulator Controller
  • Negative Linear-Regulator Controller
  • Triple-Level Protection Against Smoke or Fire
    • Input Switch Replaces Input Fuse
    • Output Overload Detection with Timer Latch
    • Thermal Shutdown
  • 2.7V to 5.5V Input Operating Range
  • Ultra-Small External Components
  • 1µA Shutdown Current (max)
  • 1mA Quiescent Current (max)
  • Ultra-Thin 16-Pin QFN Package (0.8mm Maximum Thickness)
MAX1889
Triple-Output TFT LCD Power Supply with Fault Protection
MAX1889: Typical Operating Circuit
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

Learn More
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Hardware Ecosystem

Parts Product Life Cycle Description
LCD/CCD/OLED Bias 1
MAX1748
PRODUCTION Triple-Output TFT-LCD DC-DC Converters
Product 4
MAX1790
NOT RECOMMENDED FOR NEW DESIGNS Low-Noise Step-Up DC-DC Converters
MAX1778
NOT RECOMMENDED FOR NEW DESIGNS Quad-Output TFT LCD DC-DC Converters with Buffer
MAX1996A
High-Efficiency, Wide Brightness Range, CCFL Backlight Controller
MAX1995
High-Efficiency, Wide Brightness Range, CCFL Backlight Controllers
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Evaluation Kits

MAX1889EVKIT

Evaluation Kit for the MAX1889

Buy Now View Details

Features and Benefits

  • 2.7V to 5.5V Input Range
  • Output Voltages
    • 9V Output at 200mA (Step-Up Switching)
    • 20V Output >10mA (Positive Charge-Pump Regulator)
    • -7V Output >10mA (Negative Charge-Pump Regulator)
  • Resistor-Adjustable Outputs
  • Up to Three Positive and Three Negative Charge-Pump Stages
  • Up to +28V and -22V Linear-Regulated Output (As Configured)
  • 90&% Efficiency
  • 500kHz/1MHz Step-Up Switching Frequency
  • Overcurrent Protection
  • Low Profile
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1889 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains a step-up switching regulator, a positive three-stage charge-pump and high-voltage positive linear-regulator controller, and a negative three-stage charge-pump and high-voltage negative linear-regulator controller. The step-up switching circuit is configured for a 9V output and provides up to 200mA from a DC supply voltage of 2.7V to 5.5V.

The positive charge-pump and linear regulator are configured for a 20V output using two charge-pump stages providing up to 10mA. The negative charge pump and linear regulator are configured for a -7V output using a single charge-pump stage providing up to 10mA. Power for the positive charge-pump input can be provided by the DC input source or the step-up switching regulator output. Power for the negative charge-pump input can be provided by the DC input source or the power ground.

The MAX1889 EV kit demonstrates low quiescent current and high efficiency (up to 90%) for maximum battery life. The EV kit features overload protection for the input and all outputs. Operation at 1MHz allows the use of tiny surface-mount components. The MAX1889 QFN package (1.0mm max) with low-profile external components allows this circuit to be 1.25mm high.

Applications

  • Car-Navigation Displays
  • LCD Monitors
  • Notebook Computer Displays
MAX1889EVKIT
Evaluation Kit for the MAX1889

Latest Discussions

No discussions on max1889 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed