MAX1882

四路输出、TFT LCD DC-DC转换器,带有缓冲器


点击查看特定型号的库存状况。

说明

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).
MAX1778、MAX1880、MAX1881、MAX1882、MAX1883、MAX1884、MAX1885:典型工作电路 MAX1778、MAX1880、MAX1881、MAX1882、MAX1883、MAX1884、MAX1885:典型工作电路 放大+

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

  • TFT-LCD台式机监视器
  • TFT-LCD笔记本显示器
产品可靠性报告: MAX1882.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

 
Status:
Package:
Temperature:

相关资料


MAX20710
Integrated, Step-Down Switching Regulator with PMBus

  • High Power Density and Low Component Count
  • Optimized Component Performance and Efficiency with Reduced Design-In Time
  • Increased Power-Supply Reliability with System and IC Self-Protection Features

MAX17760
4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX20430
Four-Output Mini PMIC for Safety Applications

  • Multiple Functions for Small Size
  • High-Precision for ASIL Applications
  • Diagnostics and Redundant Circuits

MAX18066
High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches

  • Feature Integration Shrinks Solution Size
  • High Efficiency Conserves Power
  • Safe, Reliable, Accurate Operation

MAX18166
High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches

  • Feature Integration Shrinks Solution Size
  • High Efficiency Conserves Power
  • Safe, Reliable, Accurate Operation

MAX77511
10V输入、四相位、可配置、3A/相位、高效Buck转换器

  • 3A/相配置Buck调节器
  • 2.3V至10V输入电压范围
  • 0.25V至5.2V输出电压范围

MAX77711
10V输入、四相位、可配置、3A/相位、高效Buck转换器

  • 3A/相配置Buck调节器
  • 2.3V至10V输入电压范围
  • 0.25V至5.2V输出电压范围

MAX15158, MAX15158A
High-Voltage Multiphase Boost Controller

  • Wide Operating Range
  • Integration Reduces Design Footprint
  • Robust Fault Protection Improves Quality and Reliability

MAX15158A
High-Voltage Multiphase Boost Controller

  • Wide Operating Range
  • Integration Reduces Design Footprint
  • Robust Fault Protection Improves Quality and Reliability

MAX25201
汽车级、36V、低IQ、200kHz至2.2MHz同步升压控制器

  • 满足严格的OEM模块功耗和性能规范
  • 支持启动就绪设计
  • EMI抑制特性可降低对敏感无线电频段的干扰,且不影响较宽输入电压范围

MAX25202
汽车级、36V、低IQ、200kHz至2.2MHz同步升压控制器

  • 满足严格的OEM模块功耗和性能规范
  • 支持启动就绪设计
  • EMI抑制特性可降低对敏感无线电频段的干扰,且不影响较宽输入电压范围

MAX25200
汽车级、36V、低IQ、200kHz至2.2MHz SEPIC/反激控制器

  • 满足严格的OEM模块功耗和性能规范
  • 跳脉冲模式下静态电流仅为20µA
  • ±1.5%反馈电压精度

MAX20499
汽车核心供电电源5V、8A/12A降压型转换器

  • 高效DC-DC转换器
  • 高达12A峰值输出电流:
  • 远端差分电压检测

MAX20075D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX20076D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX25276D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX20076E
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing