TPS51222 固定频率 99% 占空比峰值电流模式笔记本系统功率控制器
TPS51222 描述
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.
|
TPS51020 |
TPS5120 |
TPS51221 |
TPS51222 |
TPS5124 |
| Topology |
Buck |
Buck |
Buck |
Buck |
Buck |
| Vin(Min)(V) |
4.5 |
4.5 |
4.5 |
4.5 |
4.5 |
| Vin(Max)(V) |
28 |
28 |
28 |
32 |
15 |
| Vout(Min)(V) |
0.9 |
0.9 |
1 |
1 |
0.9 |
| Vout(Max)(V) |
24 |
26 |
12 |
12 |
12 |
| Regulated Outputs(#) |
2 |
2 |
2 |
2 |
2 |
| Iout(Max)(A) |
20 |
20 |
20 |
20 |
20 |
| Switching Frequency(Max)(kHz) |
450 |
500 |
1000 |
1000 |
500 |
| Iq(Typ)(mA) |
1.4 |
1.1 |
1.3 |
|
1.1 |
| Pin/Package |
30TSSOP |
30TSSOP |
32QFN |
32QFN |
30TSSOP |
| Thermal Shutdown |
Yes |
Yes |
Yes |
Yes |
No |
| Vout2(Min)(V) |
0.9 |
0.9 |
1 |
1 |
0.9 |
| Vout2(Max)(V) |
24 |
26 |
12 |
12 |
12 |
| Iout2(A) |
20 |
15 |
20 |
20 |
20 |
| Rating |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
| Duty Cycle(Max)(%) |
88 |
80 |
99 |
99 |
80 |
TPS51222 特性
- 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
TPS51222 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS51222RTVR |
ACTIVE |
-40 to 85 |
3.00 | 1ku |
QFN (RTV) | 32 |
3000 | LARGE T&R |
TPS
51222 |
| TPS51222RTVT |
ACTIVE |
-40 to 85 |
3.30 | 1ku |
QFN (RTV) | 32 |
250 | SMALL T&R |
TPS
51222 |
TPS51222 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| TPS51222RTVR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS51222RTVR |
| TPS51222RTVT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS51222RTVT |
TPS51222 应用技术支持与电子电路设计开发资源下载
- TPS51222 数据资料 dataSheet 下载.PDF
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Understanding Boost Power Stages In Switchmode Power Supplies
(PDF 149 KB)
- Understanding Buck Power Stages In Switchmode Power Supplies
(PDF 173 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
TPS51222 相关工具
TPS51222 参考设计
| 说明 |
型号 |
公司 |
| 二相同步 降压，输入电压为 5V 或 12V。 多路输出电压：1.8V 和 3.3V |
PMP176 |
Texas Instruments |
| 同步降压时，输入电压为 19.5V |
PMP070 |
Texas Instruments |
| 同步降压，输入电压为 12V |
PMP217 |
Texas Instruments |
| 热插拔、推挽、同步 降压、负反向、双路同步 降压参考设计 |
PMP156 |
Texas Instruments |
| 集成 FET、正向、双路同步的同步降压 降压参考设计 |
PMP041 |
Texas Instruments |
