Part Number: MAX1748
Function: Triple-Output TFT LCD DC-DC Converter
Package: TSSOP 16 Pin Type
Manufacturer: Maxim Integrated
Pinouts:
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 boost ed 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%.The dual charge pumps independently regulate one positive output (VPOS) and one negative output (VNEG). These low-power outputs use external diode and capacitor stages (as many stages as required) to regulate output voltages up to +40V and down to -40V. A proprietary regulation algorithm minimizes output ripple, as well as capacitor sizes for both charge pumps.
Features
1. Three Integrated DC-DC Converters
2. 1MHz Current-Mode PWM Boost Regulator
(1) Up to +13V Main High-Power Output ±1% Accuracy
(2) High Efficiency (93%)
3. Dual Charge-Pump Outputs
(1) Up to +40V Positive Charge-Pump Output
(2) Down to -40V Negative Charge-Pump Output
4. Internal Supply Sequencing
5. Internal Power MOSFETs
6. +2.7V to +5.5V Input Supply
7. 0.1µA Shutdown Current
8. 0.6mA Quiescent Current
9. Internal Soft-Start
10. Power-Ready Output
11. Ultra-Small External Components
Other data sheets are available within the file: MAX1748EUE, MAX8726,
MAX8726EUE, MAX1748EVKIT