MAX8784

升压型调节器，内置电荷泵、开关控制及运算放大器，用于TFT LCD; \n• 升压调节器为LCD面板源驱动器供电 \n• 为脉冲负载提供快速瞬态响应 \n• 内置18V、4A、0.11Ω n沟道功率MOSFET，具有无损耗的电流检测 \n• 逐周期限流比较器 \n• 90%的效率(5VIN至15VOUT) \n• 1.2MHz开关频率 \n• 三路大电流19V运算放大器 \n• 180mA输出短路电流 \n• 45V/µs摆率 \n• 20MHz带宽 \n• 满摆幅输入和输出 \n• 稳压型三倍压电荷泵，具有内置二极管，用于TFT栅极导通供电 \n• 稳压型电荷泵用于TFT栅极关断供电 \n• 内置排序电路 \n• 内部数字软启动 \n• 36V栅极导通开关 \n• 启动定时电容连接在AVDD和GON上 \n• 过压和热保护 \n• 4V至5.5V输入电压范围;

MAX8784可为电视和显示器中的薄膜晶体管(TFT)液晶显示(LCD)面板提供所需的各种电源电压。该芯片包括了升压调节器、一路稳定的正电荷泵、一路稳定的负电荷泵、三路大电流运算放大器和一个Dual Mode™逻辑控制高压开关模块。HVS模式自动提高boost调节器和正电荷泵的输出电压，用于量产时测试显示器面板。MAX8784可工作在4V至5.5V输入电压下，针对LCD TV面板和LCD显示器应用实现了优化。\n 该升压DC-DC调节器可为TFT的源驱动器提供稳定的电源电压。该升压调节器为一款高频率(1.2MHz)、高效率、电流模式调节器。该升压调节器具有110mΩ (典型值)的内置功率MOSFET。高开关频率允许采用超小型电感和陶瓷电容。电流架构具有快速瞬态响应并可很方便的实现补偿。升压调节器具有输出过压保护、软启动、内部限流以及可通过外部电阻分压器调节的输出电压。\n 三路运算放大器可驱动LCD背板和伽玛修正分压器串。各个运算放大器具有快速的摆率(45V/µs)、较宽的带宽(20MHz)以及大输出短路电流(200mA)。各个运算放大器具有满摆幅输入和满摆幅输出。\n 正电荷泵调节器和负电荷泵调节器可为TFT栅极驱动器提供稳定的电源电压。该正电荷泵是两级电荷泵，不需要任何外部二极管。两个电荷泵的输出均可通过电阻调节。逻辑可控的高电压开关可用于控制TFT栅极驱动器的正电源。\n MAX8784可采用小尺寸(5mm x 5mm)、低高度(0.8mm)、40引脚薄型QFN封装，可工作在-40°C至+85°C的温度范围。

MAX878C/D

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878CPA

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878CSA

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878CSLASHD

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878EPA

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878ESA

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX878MJA

5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

GeneralDescription TheMAX877/MAX878/MAX879arepulse-skipping,step-up/step-downDC-DCconvertersthatprovidearegulatedoutputfrominputsbothaboveandbelowtheoutput.Theyrequireonlythreeexternalcomponents—aninductor(typically22µH)andtwofiltercapacitors. Features ♦Regulat

MAX8784

Step-Up Regulator, Internal Charge Pumps, Switch Control, and Operational Amplifier for TFT LCDs

MAX8784ETL+

Step-Up Regulator, Internal Charge Pumps, Switch Control, and Operational Amplifier for TFT LCDs