LM3280中文资料用于射频电源管理的可调节、降压 DC-DC 转换器和 3 LDO数据手册TI规格书

描述 Description

The LM3280 is a multi-functional Power Management Unit, optimized for low-power handheld applications such as Cellular Phones.

The LM3280 incorporates three low-dropout LDO voltage regulators and one step down PWM DC-DC converter with an internal Bypass FET. The step down converter's output voltage can be set using an analog input (VCON) for optimizing efficiency of the RF PA at various power levels. The LDO operates a nominal output voltage of 2.85V and maximum load current capability of 20mA for a reference voltage required by linear RF power amplifiers. The LM3280 additionally features a separate enable pin for each output.

The LM3280 is available in a 16-pin lead free DSBGA package.

特性 Features

• 2MHz (typ.) PWM Switching Frequency
• Operates from a Single Li-Ion Cell (2.7V to 5.5V)
• Adjustable Output Voltage (0.8V to 3.6V) DC-DC
• High-Efficiency Synchronous Buck Converter
• 300mA Maximum Load Capability (PWM Mode)
• 500mA Maximum Load Capability (Bypass mode)
• PWM, Forced and Automatic Bypass Mode
• 3 Low-Dropout and Fast Transient Response LDOs
• 16-pin DSBGA Package
• Current Overload Protection
• Thermal Overload Protection

简介

LM3280属于集成电路（IC）的线性稳压器控制器。由TI制造生产的LM3280稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。