TPS51221中文资料适用于笔记本电脑电源的 3V 至 28V 同步双路输出峰值电流模式降压控制器数据手册TI规格书

描述 Description

The TPS51221 is a dual synchronous buck regulator controller with 2 LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51221 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 28 V, and output voltages from 1 V to 12 V. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The high duty (99%) operation and wide input/ output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1MHz by a resistor, and each channel runs 180° out of phase. The TPS51221 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51221 is available in the 32-pin 5×5 QFN package and is specified from -40°C to 85°C.

特性 Features

• Input Voltage Range: 4.5 V to 28 V
• Selectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio™ Skip)
• Voltage Servo Adjustable Soft Start
• Current Mode Architecture
• Resistor or Inductor DCR Current Sensing
• OCL/OVP/UVP/UVLO protections
• Thermal Shutdown (Non-latch)
• Integrated Boot Strap MOSFET Switch
• APPLICATIONS
• Point of load in LCD TV, MFP

Out-Of-Audio, PowerPAD are trademarks of Texas Instruments.

简介

TPS51221属于集成电路（IC）的线性稳压器控制器。由TI制造生产的TPS51221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。