MAX1517A:TFT-LCD DC-DC Converters with Operational Amplifiers

TFT LCD, DC-DC Converters with a High-Performance Step-Up Regulator, Two Linear-Regulator Controllers, and High-Current Operational Amplifiers for Active-Matrix, Thin-Film Transistor (TFT) LCDs

The MAX1516A/MAX1517A/MAX1518A include a high-performance step-up regulator, two linear-regulator controllers, and 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 step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (1.2MHz) current-mode regulator with an integrated 14V n-channel MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while achieving efficiencies over 85%. The gate-on and gate-off linear-regulator controllers provide regulated TFT gate-on and gate-off supplies, using external charge pumps attached to the switching node. The MAX1518A includes five high-performance operational amplifiers, the MAX1517A includes three, and the MAX1516A includes one operational amplifier. These amplifiers are designed to drive the LCD backplane (VCOM) and/or the gamma-correction divider string. The devices feature high output current ±150mA), fast slew rate (13V/µs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs. The MAX1516A/MAX1517A/MAX1518A are available in 32-pin thin QFN packages with a maximum thickness of 0.8mm for ultra-thin LCD panels.

Key Features
  • 2.6V to 5.5V Input Supply Range
  • 1.2MHz Current-Mode Step-Up Regulator
    • Fast Transient Response to Pulsed Load
    • High-Accuracy Output Voltage (1.5%)
    • Built-In 14V, 2.4A, 0.16Ω n-Channel MOSFET
    • High Efficiency (90%)
  • Linear-Regulator Controllers for VGON and VGOFF
  • High-Performance Operational Amplifiers
    • ±150mA Output Short-Circuit Current
    • 13V/µs Slew Rate
    • 12MHz, -3dB Bandwidth
    • Rail-to-Rail Inputs/Outputs
  • Logic-Controlled, High-Voltage Switch with Adjustable Delay
  • Timer-Delay Fault Latch for All Regulator Outputs
  • Thermal-Overload Protection
  • 0.6mA Quiescent Current
MAX1516A, MAX1517A, MAX1518A: Minimal Operating Circuit
MAX1516A, MAX1517A, MAX1518A: Minimal Operating Circuit
Applications/Uses
  • LCD Monitor Panels
  • Notebook Computer Displays
DataSheet
titleDownload file
MAX1516A-MAX1518A Data SheetMAX1516A-MAX1518A.pdf
Parametrics
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Inverting OutputsPackage/Pins
minmaxminmax
MAX1516AStep-UpOutput UVP
Reset Output
Shutdown
Adj. Frequency
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
TFT Bias
VCOM Buffer
2.65.52.6140.750.7512001See Data Sheet
MAX1517ASee Data Sheet
MAX1518ASee Data Sheet
Related Products
  • MAX1543:TFT LCD DC-to-DC Converter with Operational Amplifiers
MAX1516A-MAX1518A.pdf MAX1518A
最简工作电路 MAX1518A