The MAX1748EUE+T is a triple output TFT-LCD DC-DC converter in 16 pin TSSOP package. It provide 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 (0.35ohm) of the integrated power MOSFET allows efficiency up to 93%. The dual charge pumps independently regulate one positive output (VPOS) and one negative output (VNEG). IC soft-starts each supply as soon as the previous supply finishes. It is used in TFT active-matrix LCD displays, passive-matrix LCD displays, PDAs, digital still cameras and camcorders.
- Supply voltage range is 2.7V to 5.5V
- Operating temperature range from -40°C to 85°C
- 3 integrated DC-DC converters, internal supply sequencing & internal power MOSFETs
- 1MHz current-mode PWM boost regulator, up to +13V main high-power output, ±1% accuracy
- High efficiency of 93%, dual charge-pump outputs, up to +40V positive charge-pump output
- Down to -40V negative charge-pump output
- 0.1μA shutdown current, 0.6mA quiescent current, internal soft-start & power-ready output
- Ultra-small external components
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