MAX1729中文资料ECB及LCD偏置电源，带有精确的输出电压及温度补偿数据手册ADI规格书

描述 Description

The MAX1729 micropower step-up/step-down DC-DC converter is ideally suited for electrically controlled birefringence (ECB) and liquid-crystal-display (LCD) bias-supply generation. It provides step-up/step-down voltage conversion and reduces output ripple by using a step-up DC-DC converter followed by a linear regulator. This architecture permits a physically smaller inductor than those used in competing SEPIC and flyback topologies. This device features low quiescent current (67µA typical). A logic-controlled shutdown mode further reduces quiescent current to 0.4µA typical.
The MAX1729 features an input that dynamically adjusts the output voltage to control display color or contrast. It offers two feedback modes: internal and external. Internal feedback mode allows output voltages between 2.5V and 16V, and is specifically designed to hold temperature drift to ±11ppm/°C. External feedback mode allows the MAX1729 output voltage range to be tailored for various displays.
An on-chip temperature sensor with a positive temperature coefficient provides compensation for LCD/ECB display temperature characteristics. In internal feedback mode, the buffered temperature sensor output is read and used to adjust the output voltage via a digital control signal. External feedback mode features an additional compensation method in which the temperature output is summed directly into the feedback network to provide first-order negative temperature compensation of the output voltage. The MAX1729 is available in the space-saving 10-pin µMAX package.

特性 Features

• High-Accuracy Reference Voltage (±1%)
• ±11ppm/°C Output Voltage Drift
• On-Chip Temperature Sensor Output
• Accurate Voltage and Temperature Provide:
• Consistent ECB Colors
• Consistent LCD Gray-Scale Contrast
• +2.7V to +5.5V Input Voltage Range
• Output Voltage Range
• +2.5V to +16V in Internal Feedback Mode
• Programmable in External Feedback Mode
• Dynamic Control of the Output Voltage
• 67µA Supply Current
• 0.4µA Shutdown Current
• 10-Pin µMAX Package (1.09mm max height)
• Evaluation Kit Available (MAX1729EVKIT)

应用 Application

• 蜂窝电话
• ECB显示器偏置与彩色调节
• LCD显示器偏置与对比度调节
• PDA及其它手持设备

简介

MAX1729属于集成电路（IC）的稳压器-DC-DC开关稳压器。由ADI制造生产的MAX1729稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。