SLVSAD5A July 2010 – August 2015 TPS62120 , TPS62122
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DCN|8
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DCN|8
訂購(gòu)信息
11 Layout
11.1 Layout Guidelines
As for all switching power supplies, the layout is an important step in the design. Proper function of the device demands careful attention to PCB layout. Care must be taken in board layout to get the specified performance. If the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues, as well as EMI problems. It is critical to provide a low inductance, impedance ground path. Therefore, use wide and short traces for the main current paths. The input capacitor should be placed as close as possible to the IC pins as well as the inductor and output capacitor.
Use a common Power GND node and a different node for the signal GND to minimize the effects of ground noise. Keep the common path to the GND PIN, which returns the small signal components and the high current of the output capacitors as short as possible to avoid ground noise. The FB divider network and the VOUT line must be connected to the output capacitor. The VOUT pin of the converter should be connected through a short trace to the output capacitor. The FB line must be routed away from noisy components and traces (for example, SW line).
11.2 Layout Examples
Figure 41. PCB Layout - DCN Package
Figure 42. PCB Layout - DRV Package