数据手册MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 .pdf [英文Rev.2(PDF,818.6kB)]

{状况:生产中。}

The MAX1778/MAX1880–MAX1885 multiple-output DC-DC converters provide the regulated voltages required by active matrix thin-film transistor (TFT) liquid crystal displays (LCD) in a low-profile TSSOP package. One high-power step-up converter and two low-power charge pumps convert the 2.7V to 5.5V input voltage into three independent output voltages. A built-in linear regulator and VCOM buffer complete the power-supply requirements. The main step-up converter accurately generates an externally set output voltage up to 13V that can supply the display's row/column drivers. The converter's high switching frequency and current-mode PWM architecture provide fast transient response and allow the use of small low-profile inductors and ceramic capacitors. The low-power BiCMOS control circuitry and internal 14V switch (0.35≈ N-channel MOSFET) enable efficiencies up to 91%. The dual low-power charge pumps (MAX1778/ MAX1880/MAX1881/MAX1882 only) 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 -40V. A unique control scheme minimizes output ripple as well as capacitor sizes for both charge pumps. A resistor-programmable, 40mA, low-dropout linear regulator (MAX1778/MAX1881/MAX1883/MAX1884 only) provides preregulation or postregulation for any of the supplies. For higher current applications, an external transistor can be added. Additionally, the VCOM buffer provides a high current output that is ideal for driving the capacitive backplane of TFT LCD panels. The VCOM buffer's output voltage is preset with an internal 50% resistive-divider or can be externally adjusted for other voltages. The MAX1778/MAX1880–MAX1885 are protected against output undervoltage and thermal overload conditions by a latched fault detection circuit that shuts down the device. All devices are available in the ultra-thin TSSOP package (1.1mm max height).

产品关键特性
  • 500kHz/1MHz Current-Mode PWM Step-Up Regulator
    • Up to +13V Main High-Power Output
    • ±1% Accurate
    • High Efficiency (91%)
  • Dual Regulated Charge-Pump Outputs (MAX1778/MAX1880–MAX1882 only)
    • Up to +40V Positive Charge-Pump Output
    • Up to -40V Negative Charge-Pump Output
  • Low-Dropout 40mA Linear Regulator (MAX1778/MAX1881/MAX1883/MAX1884 only)
    • Up to +15V LDO Input
  • Optional Higher Current with External Transistor
  • 2.7V to 5.5V Input Supply
  • Internal Supply Sequencing and Soft-Start
  • Power-Ready Output
  • Adjustable Fault-Detection Latch
  • Thermal Protection (+160°C)
  • 0.1µA Shutdown Current
  • 0.7mA IN Quiescent Current
  • Ultra-Small External Components
  • Thin TSSOP Package (1.1mm max height)
应用与使用范围
  • TFT-LCD台式机监视器
  • TFT-LCD笔记本显示器
典型工作电路

芯片订购型号
订购型号产品状态封装形式工作温度RoHS/无铅
MAX1778EUG生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1778EUG+生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1778EUG+T生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1778EUG-T生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1880EUG生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1880EUG+生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1880EUG+T生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1880EUG-T生产中TSSOP;24引脚封装信息-40°C至+85°C参考数据资料
MAX1880EUG/V+生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1880EUG/V+T生产中TSSOP;封装信息-40°C至+85°C参考数据资料
MAX1881EUG生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1881EUG+生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1881EUG+T生产中TSSOP;封装信息-40°C至+85°C参考数据资料
MAX1881EUG-T生产中TSSOP;24引脚封装信息-40°C至+85°C参考数据资料
MAX1882EUG生产中TSSOP;24引脚;52.4mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1882EUG-T生产中TSSOP;封装信息-40°C至+85°C参考数据资料
MAX1883EUP生产中TSSOP;20引脚;45.2mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1883EUP-T生产中TSSOP;20引脚封装信息-40°C至+85°C参考数据资料
MAX1884EUP生产中TSSOP;20引脚;45.2mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1884EUP-T生产中TSSOP;封装信息-40°C至+85°C参考数据资料
MAX1885EUP生产中TSSOP;20引脚;45.2mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1885EUP-T生产中TSSOP;封装信息-40°C至+85°C参考数据资料
评估板与开发套件
MAX1778EVKITMAX1778、MAX1880、MAX1881、MAX1882评估板
相关芯片型号
MAX1778EVKITMAX1778、MAX1880、MAX1881、MAX1882评估板
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1778
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1880
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1881
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1882
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1883
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1884
MAX1778, MAX1880, MAX1881, MAX1882, MAX1883, MAX1884, MAX1885 : 四路输出、TFT LCD DC-DC转换器,带有缓冲器 MAX1885