固定频率, 99 %占空比峰值电流模式笔记本系统功率控制器 Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
DESCRIPON
The TPS51222 is a dual synchronous buck regulator controller with two 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 TPS51222 supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 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 cycle 99% operation and the 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 1 MHz by a resistor, and each channel runs 180° out-of-phase. The TPS51222 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51222 is available in the 32-pin 5 × 5 QFN package and is specified from –40°C to 85°C.
FEATURES
• Input Voltage Range: 4.5 V to 32 V
• Output Voltage Range: 1 V to 12 V
• Selectable Light Load Operation Continuous / Auto Skip / Out-Of-Audio™ Skip
• Programmable Droop Compensation
• Voltage Servo Adjustable Soft Start
• 200-kHz to 1-MHz Fixed-Frequency PWM
• Current Mode Architecture
• 180° Phase Shift Between Channels
• Resistor or Inductor DCR Current Sensing
• Current Monitor Output for Each Channel
• Adaptive Zero Crossing Circuit
• Powergood Output for Each Channel
• OCL/OVP/UVP/UVLO Protections
• Thermal Shutdown Non-Latch
• Output Discharge Function
• Integrated Boot Strap MOSFET Switch
• QFN-32 RTV Package
APPLICATIONS
• Notebook Computer System and I/O Bus
• Point of Load in LCD TV, MFP
输出接口数 4
输出电压 1V ~ 12V
耗散功率 1.7 W
静态电流 800 µA
调节输出数 2
开关频率 200kHz ~ 1MHz
过温保护 Yes
拓扑结构 Buck
占空比 99 %
最大占空比 99 %
工作温度Max 85 ℃
工作温度Min 40 ℃
电源电压 4.5V ~ 32V
输入电压 4.5V ~ 32V
安装方式 Surface Mount
引脚数 32
封装 WFQFN-32
封装 WFQFN-32
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
TPS51222RTVR TI 德州仪器 | 当前型号 | 当前型号 |
TPS51222RTVT 德州仪器 | 类似代替 | TPS51222RTVR和TPS51222RTVT的区别 |