TPS51221
- 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
- Current Mode Architecture
- 180° Phase Shift Between Channels
- Resistor or Inductor DCR Current Sensing
- Powergood Output for each channel
- OCL/OVP/UVP/UVLO protections
- Current Monitor Output for CH1
- Thermal Shutdown (Non-latch)
- Output Discharge Function (Disable option)
- Integrated Boot Strap MOSFET Switch
- QFN32 (RTV)
- APPLICATIONS
- Notebook Computer System and I/O Bus
- Point of load in LCD TV, MFP
Out-Of-Audio, PowerPAD are trademarks of Texas Instruments.
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.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Fixed Frequency 99% Duty Cycle Peak Current Mode Notebook System Pwr Controlle 数据表 (Rev. A) | 2009年 2月 26日 |
设计和开发
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封装 | 引脚 | 下载 |
---|---|---|
WQFN (RTV) | 32 | 查看选项 |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点