TPS51220 - 固定频率 99% 占空比峰值电流模式笔记本系统功率控制器

TPS51220是TI德州仪器公司的一款控制器（外部开关）产品，TPS51220是固定频率 99% 占空比峰值电流模式笔记本系统功率控制器，本站介绍了TPS51220的封装应用图解、特点和优点、功能等，并给出了与TPS51220相关的TI元器件型号供参考。

TPS51220 - 固定频率 99% 占空比峰值电流模式笔记本系统功率控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS51220 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 TPS51220 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. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (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 TPS51220 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220 is available in the 32 pin 5x5 QFN package and is specified from -40°C to 85°C.

产品特性

Input Voltage Range: 4.5 V to 28 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
Selectable Current/D-CAP Mode Architecture
180° Phase Shift Between Channels
Resistor or Inductor DCR Current Sensing
Powergood Output for Each Channel
OCL/OVP/UVP/UVLO Protections (OVP Disable Option)
Thermal Shutdown (Non-Latch)
Output Discharge Function (Disable Option)
Integrated Boot Strap MOSFET Switch
QFN-32 (RHB)
APPLICATIONS
- Notebook Computer System and I/O Bus
- Point of Load in LCD TV, MFP

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