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)
| Status |
| Active: In Production. |
| Description | ||||||
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. | ||||||
DownloadAn evaluation kit is available: MAX1543EVKIT
| Key Features | Applications/Uses | |
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| 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 |
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2.6 | 5.5 | 2.6 | 13 | 1.5 | 1.5 | 1200 |
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26 | $3.40 @1k | |||||||||||||||||
| MAX1543 |
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$3.40 @1k | ||||||||||||||||||||||||||||
| See All Multifunction PMICs (83) | ||||||||||||||||||||||||||||||
| Diagram |
 Functional Diagram |
source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com
