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参数资料
| 型号： | SI8250DK |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 21/32页 |
| 文件大小： | 0K |
| 描述： | DEVELOPMENT KIT FOR SI8250/1/2 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 输出电压： | 1V |
| 电流 - 输出： | 35A |
| 输入电压： | 36 ~ 75 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 400kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板，线缆，CD，电源，USB 适配器 |
| 已用 IC / 零件： | SI8250，SI8251，SI8252 |
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Si8250/1/2
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 V DD supply
should be decoupled from the main supply. The LQFP-
32 package provides the best noise performance
because it has separate analog and digital V DD and
ground inputs (V DDA , GNDA).
Ferrite bead
500 mA, 40 Ω
As shown in Figure 10, the V DDA is decoupled by a filter
consisting of a 1 Ω resistor in series with a 500 mA,
40 Ω ferrite bead and a parallel combination of a 10 μF
with a 0.1 μF high-frequency bypass capacitor. All
connections should be kept as short as possible. V DDA
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 11. Again, all
connections should be kept as short as possible.
1 Ω
2.5 V
10 uF
0.1 uF
10 uF
0.1 uF
V DDA
V DD
Si8250/1/2
GNDA
GND
Keep trace
lengths as short
GNDA
as possible
Figure 10. Power Supply Connections for LQFP-32 Package
Ferrite bead
500 mA, 40 Ω
1 Ω
2.5 V
10 uF
0.1 uF
VDD
Si8250/1/2
GND
Keep trace
lengths as short
as possible
Figure 11. Power Supply Connections for QFN-28 Package
Rev. 1.0
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8250-IM | 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-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 |
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