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MAX1513, MAX1514
TFT-LCD Power-Supply Controllers

TFT-LCD Power-Supply Controllers Provide Complete Power-Supply Solutions for Active-Matrix Thin-Film Transistor (TFT) Liquid-Crystal Displays (LCDs)


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Description
FULL DATA SHEET (PDF, 544kB)
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The MAX1513/MAX1514 provide complete power-supply solutions for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). Both devices include a high-performance step-up regulator controller, three linear- regulator controllers, and an adjustable delay block for startup sequencing. The MAX1513 includes an additional linear-regulator controller and a high-performance buffer amplifier. The MAX1513/MAX1514 can operate from 2.7V to 5.5V input supplies and provide overload protection with timer delay latch on all the regulated outputs.

The step-up regulator controller drives an external N-channel MOSFET to generate the regulated supply voltage for the panel source-driver ICs. Its current-mode control architecture provides fast transient response to pulsed loads. The high switching frequency (up to 1.5MHz) allows the use of ultra-small inductors and ceramic capacitors while achieving efficiencies over 85% using lossless current sensing. The internal soft-start limits the input surge current during startup.

The gate-on and gate-off linear-regulator controllers of the MAX1513/MAX1514 provide regulated TFT gate-on and gate-off supplies. The gate-on supply is activated after an adjustable delay following the step-up regulator. The logic linear-regulator controller can be used to create a low-voltage logic supply. The gamma linear-regulator controller of the MAX1513 can be used to generate a gamma-correction reference supply or another generalpurpose supply rail. The MAX1513's high-performance buffer amplifier can drive the LCD backplane (VCOM) or the gamma-correction divider string.

The MAX1513/MAX1514 are available in 4mm x 4mm 20-pin thin QFN packages with a maximum thickness of 0.8mm, suitable for ultra-thin LCD panel design.

Key Features   Applications/Uses
  • 2.7V to 5.5V Input Supply Range
  • Input-Supply Undervoltage Lockout
  • Current-Mode Step-Up Controller
    • Fast Transient Response to Pulsed Load
    • High Efficiency
    • Lossless Current Sensing
    • 430kHz/750kHz/1.5MHz Switching Frequency
  • Linear-Regulator Controllers for VGON, VGOFF
  • Linear-Regulator Controller for Logic Supply
  • High-Performance Buffer Amplifier (MAX1513 Only)
  • Additional Linear-Regulator Controller (MAX1513 Only)
  • Power-Up Sequence and VGON Delay Control
  • VMAIN, VGON, VGOFF, VGAMMA Shutdown Control
  • Timer-Delay Fault Latch for All Outputs
  • Thermal-Overload Protection

 
  • Automotive Displays
  • LCD Monitors and TVs
  • Notebook Computer Displays

    Key Specifications:   Switch-Mode DC-DC Power Supplies
    Part Number Topology VIN (min) (V) VIN (max) (V) Number of DC-DC Outputs Digital/VID Programmed Output IOUT (A) Operating Current, ICC (max) (mA) Fixed Freq/PWM Operation Operating Freq. (kHz) Internal Power Switch(es) Synchronous Rectifier Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX1513  Step-Down 2.7 5.5 1 No 0.5 1.25 Yes 1500
    430
    750
    No No THIN QFN/20 17 $3.90 @ 1k
    MAX1514   
    See All Switch-Mode DC-DC Power Supplies (421)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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    Document Ref.: 19-3047; Rev 0; 2004-01-27
    This page last modified: 2008-03-13



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