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General Description

The MAX1748/MAX8726 triple-output DC-DC converters in a low-profile TSSOP package provide the regulated voltages required by active-matrix, thin-film transistor (TFT) liquid-crystal displays (LCDs). One high-power DC-DC converter and two low-power charge pumps convert the +3.3V to +5V input supply voltage into three independent output voltages.

The primary 1MHz DC-DC converter generates a boosted output voltage (VMAIN) up to 13V using ultra-small inductors and ceramic capacitors. The low-power BiCMOS control circuitry and the low on-resistance (0.35Ω) of the integrated power MOSFET allows efficiency up to 93.

Features

? Three Integrated DC-DC Converters

? 1MHz Current-Mode PWM Boost Regulator

?? Up to +13V Main High-Power Output

?? ±1 Accuracy

?? High Efficiency (93)

? Dual Charge-Pump Outputs

?? Up to +40V Positive Charge-Pump Output

?? Down to -40V Negative Charge-Pump Output

? Internal Supply Sequencing

? Internal Power MOSFETs

? +2.7V to +5.5V Input Supply

? 0.1?A Shutdown Current

? 0.6mA Quiescent Current

? Internal Soft-Start

? Power-Ready Output

? Ultra-Small External Components

? Thin TSSOP Package (1.1mm max)

Applications

?? TFT Active-Matrix LCD Displays

?? Passive-Matrix LCD Displays

?? PDAs

?? Digital Still Cameras

?? Camcorders