零件编号 : MAX1748
功能 : Triple-Output TFT LCD DC-DC Converter
制造商 : Maxim Integrated
引脚图 :
描述
General
描述
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.
特征
♦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
♦0.1µA Shutdown Current
♦0.6mA Quiescent Current
♦Internal Soft-Start
♦Power-Ready Output
♦Ultra-Small External Components
♦Thin TSSOP Package (1.1mm max)
数据手册 PDF资料下载
文件中的其他数据表：
MAX1748,MAX1748EUE,MAX8726,MAX8726EUE