LM3485中文资料4.5 至 35V 滞环非同步 PFET 降压控制器数据手册TI规格书

描述 Description

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the RDS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

特性 Features

• Easy-to-Use Control Methodology
• No Control-Loop Compensation Required
• 4.5-V to 35-V Wide Input Range
• 1.242-V to VIN Adjustable Output Range
• High Efficiency 93%
• ±1.3% (±2% Over Temp) Internal Reference
• 100% Duty Cycle
• Maximum Operating Frequency > 1 MHz
• Current Limit Protection

简介

LM3485属于开发板套件编程器的评估板-LED驱动器。由TI制造生产的LM3485评估板 - LED 驱动器LED 驱动器评估板是带有元器件的电路板，用于提供特定电路或器件的工作实例。该系列评估板提供一个 LED 驱动器实例，用于可调节闪烁、模拟亮度、背光、双极开关、升压转换器、亮度控制、相机闪光灯、可调光、恒流和 RGB 控制，以及更多其他应用。