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| 型号： | SI8250-IM |
| 厂商： | SILICON LABORATORIES |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | DIGITAL POWER CONTROLLER |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, QCC28 |
| 封装： | 5 X 5 MM, ROHS COMPLIANT, QFN-28 |
| 文件页数： | 21/30页 |
| 文件大小： | 932K |
| 代理商： | SI8250-IM |
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Si8250/1/2
Preliminary Rev. 0.8
21
6. Layout Considerations
The mixed-signal nature of the Si8250/1/2 mandates clean bias supplies and ground returns. It is best to provide
separate ground planes for analog, digital and power switch returns. These planes should tie together at only one
point to eliminate the possibility of circulating ground currents.
For best performance, the VDD supply should be decoupled from the main supply. The LQFP-32 package provides
the best noise performance because it has separate analog and digital VDD and ground inputs (AVDD, AGND). As
shown in Figure 9, the AVDD is decoupled by a filter consisting of a 1
resistor in series with a 500 mA, 40
ferrite bead and a parallel combination of a 10 uF with a 0.1 uF high-frequency bypass capacitor. All connections
should be kept as short as possible. The VDDA and GNDA should be connected into their respective ground
planes. The QFN-28 package shares analog and digital power with ground on the same pins. Power supply
decoupling is shown in Figure 10. Again, all connections should be kept as short as possible.
Figure 9. Power Supply Connections for LQFP-32 Package
Figure 10. Power Supply Connections for QFN-28 Package
AVDD
DVDD
Ferrite bead
500 mA, 40
0.1 uF
10 uF
Si8250/1/2
AGND
DGND
AGND
10 uF
0.1 uF
2.5 V
1
Keep trace
lengths as short
as possible
VDD
Ferrite bead
500 mA, 40
0.1 uF
10 uF
Si8250/1/2
GND
2.5 V
1
Keep trace
lengths as short
as possible
相关PDF资料 |
PDF描述 |
|---|---|
| SI8250-IQ | DIGITAL POWER CONTROLLER |
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| SI8401DB-T1-E3 | P-Channel 20-V (D-S) MOSFET, Low-Threshold |
| SI8401DB | Single P-Channel MOSFET; |
| SI8402DB | 20-V N-Channel 1.8-V (G-S) MOSFET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8250-IMR | 制造商:Silicon Laboratories Inc 功能描述:VOLT SUPERVISOR PWR SUPPLY 0.05V TO 0.8V 28QFN - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC DIGITAL PWR CONTROLLER 32LQFP 制造商:Silicon Laboratories Inc 功能描述:32K 28 Pin SMPS Controller |
| SI8250-IQ | 功能描述:电压监测器/监控器 SMPS Controller RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| SI8250-IQR | 制造商:Silicon Laboratories Inc 功能描述:VOLT SUPERVISOR PWR SUPPLY 0.05V TO 0.8V 32LQFP - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC DIGITAL PWR CONTROLLER 32LQFP 制造商:Silicon Laboratories Inc 功能描述:32K 32 Pin SMPS Controller |
| SI8251 | 制造商:SILABS 制造商全称:SILABS 功能描述:DIGITAL POWER CONTROLLER |
| SI8251-IM | 功能描述:功率驱动器IC SMPS Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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