MAX8864R中文资料低压差、120mA线性稳压器数据手册ADI规格书

描述 Description

The MAX8863T/S/R and MAX8864T/S/R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems.
The devices feature Dual Mode™ operation: their output voltage is preset (at 3.15V for the T versions, 2.84V for the S versions, or 2.80V for the R versions) or can be adjusted with an external resistor divider. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8864 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 5-pin SOT23 package.

特性 Features

• Low Cost
• Low, 55mV Dropout Voltage at 50mA IOUT
• Low, 68µA No-Load Supply Current Low, 80µA Operating Supply Current (even in dropout) \u0002
• Low, 350µVRMS Output Noise
• Miniature External Components
• Thermal Overload Protection
• Output Current Limit
• Reverse Battery Protection
• Dual Mode Operation: Fixed or Adjustable (1.25V to 6.5V) Output \u0002
• Low-Power Shutdown

应用 Application

• 蜂窝电话

• 电子规划器

• 调制解调器
• 掌上电脑
• PCMCIA卡
• PCS电话

简介

MAX8864R属于集成电路（IC）的线性+开关稳压器。由制造生产的MAX8864R稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。