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MAX1542, MAX1542ETP, MAX1543
TFT LCD DC-to-DC Converter with Operational Amplifiers

TFT LCD DC-DC Converters Include a High-Performance Boost Regulator and Two High-Current Operational Amplifiers for Active-Matrix, Thin-Film Transistor (TFT), Liquid-Crystal Displays (LCDs)


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 520kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Description
The MAX1542/MAX1543 include a high-performance boost regulator and two high-current operational amplifiers for active matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs). Also included is a logic- controlled, high-voltage switch with adjustable delay. The MAX1543 includes an additional high-voltage load switch and features pin-selectable boost regulator switching frequency.

The step-up DC-to-DC converter is a high-frequency 640kHz (MAX1543)/1.2MHz (MAX1542/MAX1543) current-mode regulator with a built-in power MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while producing efficiencies over 85%.

The two easy-to-use, high-performance operational amplifiers can drive the LCD backplane (VCOM) and/or the gamma correction divider string. The devices feature high short-circuit current (150mA), fast slew rate (7.5V/µs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs.

The MAX1542/MAX1543 are available in 20-pin thin QFN packages with a maximum thickness of 0.8mm for ultra-thin LCD panel design.

An evaluation kit is available:  MAX1543EVKIT  

Key Features   Applications/Uses
  • Ultra-High-Performance Step-Up Regulator
    • Fast Transient Response to Pulsed Load Using Current-Mode Control Architecture
    • High-Accuracy Output Voltage (1.3%)
    • Built-In 14V, 1.2A, 0.2Ω N-Channel Power MOSFET with Lossless Current-Sensing
    • High Efficiency (85%)
    • 8-Step Current-Controlled Digital Soft-Start
  • Two High-Performance Operational Amplifiers
    • 150mA Output Short-Circuit Current
    • 7.5V/µs Slew Rate
    • 12MHz -3dB Bandwidth
    • Rail-to-Rail Inputs/Outputs
    • Unity Gain Stable
  • Logic-Controlled High-Voltage Switch with Adjustable Delay
  • Timer Delay Latch FB Fault Protection
  • Thermal Protection
  • 2.6V to 5.5V Input Operating Voltage Range
  • 3.6mA (Switching), 0.45mA (Not Switching) Quiescent Current
  • Ultra-Thin 20-Pin Thin QFN Package (5mm x 5mm x 0.8mm)

 
  • Car-Navigation Displays
  • LCD Monitor Panels
  • Notebook Computer Displays
  • PDAs

    Key Specifications:  Multifunction PMICs
    Part Number Primary Topology DC-DC/Power Features LCD/LED/Flash/CCD Features VIN
    (V)
    VIN
    (V)
    VOUT
    (V)
    VOUT
    (V)
    Max. IOUT
    (A)
    Max. IOUT
    (A)
    Oper. Freq.
    (kHz)
    Package/Pins Smallest Available Pckg.
    (mm2)
    Price
    min max min max max w/pins See Notes
    MAX1542  Step-Up
    Current Limit
    Fixed Freq./PWM
    Internal Pwr. FETs
    Soft Start
    Op. Amps.
    TFT Bias
    2.6 5.5 2.6 13 1.5 1.5 1200
    TQFN/20
    26 $3.40 @1k
    MAX1543 
    TQFN/20
    $3.40 @1k
    See All Multifunction PMICs (83)

    Diagram
    MAX1542, MAX1542ETP, MAX1543: Functional Diagram
    Functional Diagram

    Evaluation Kits
  • MAX1543EVKIT

    Reliability Reports
  • Reliability Report: MAX1542.pdf MAX1543.pdf
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-8 of 8

    MAX1542ETP Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1542ETP    
    Active TQFN;20 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0009 (PDF)
    Use pkgcode/variation: T2055-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1542ETP-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX1542ETP+    
    Active TQFN;20 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0009 (PDF)
    Use pkgcode/variation: T2055+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1542ETP+T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX1543 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1543ETP    
    Active TQFN;20 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0009 (PDF)
    Use pkgcode/variation: T2055-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1543ETP-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX1543ETP+  
    Active TQFN;20 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0009 (PDF)
    Use pkgcode/variation: T2055+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1543ETP+T    
    Active TQFN;20 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0009 (PDF)
    Use pkgcode/variation: T2055+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2003-02-20 

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    Document Ref.: 19-2741; Rev 0; 2003-06-03
    This page last modified: 2009-07-20


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