LM20146中文资料6A，可调节频率同步降压稳压器数据手册TI规格书

描述 Description

The LM20146 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 6A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suitable for a wide variety of low voltage systems.
The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.
The LM20146 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20146 is pre-biased at startup it will not pull the ouput low.
The frequency of this device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor from the RT pin to ground.
The LM20146 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

特性 Features

• Input Voltage Range 2.95V to 5.5V
• Accurate Current Limit Minimizes Inductor Size
• 97% Peak Efficiency
• Adjustable Switching Frequency (250 kHz to 750 kHz)
• 16mΩ and 20mΩ Integrated FET Switches
• Starts up into Pre-biased Loads
• Output Voltage Tracking
• Peak Current Mode Control
• Adjustable Output Voltage Down to 0.8V
• Adjustable Soft-Start with External Capacitor
• Precision Enable Pin with Hysteresis
• Integrated OVP, UVLO, Power Good and Thermal Shutdown
• 16-Pin HTSSOP Exposed Pad Package

简介

LM20146属于集成电路（IC）的稳压器-DC-DC开关稳压器。由TI制造生产的LM20146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。