ZHCSI81L February 2009 – May 2018 LM26420
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 LM26420X 2.2-MHz, 0.8-V Typical High-Efficiency Application Circuit
- 8.2.2 LM26420X 2.2-MHz, 1.8-V Typical High-Efficiency Application Circuit
- 8.2.3 LM26420X 2.2-MHz, 2.5-V Typical High-Efficiency Application Circuit
- 8.2.4 LM26420Y 550 kHz, 0.8-V Typical High-Efficiency Application Circuit
- 8.2.5 LM26420Y 550-kHz, 1.8-V Typical High-Efficiency Application Circuit
- 8.2.6 LM26420Y 550-kHz, 2.5-V Typical High-Efficiency Application Circuit
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購(gòu)信息
8.1.2 VINC Filtering Components
Additional filtering is required between VINC and AGND in order to prevent high frequency noise on VIN from disturbing the sensitive circuitry connected to VINC. A small RC filter can be used on the VINC pin as shown in Figure 30.
Figure 30. RC Filter On VINC In general, RF is typically between 1 Ω and 10 Ω so that the steady state voltage drop across the resistor due to the VINC bias current does not affect the UVLO level. CF can range from 0.22 µF to 1 µF in X7R or X5R dielectric, where the RC time constant should be at least 2 µs. CF must be placed as close to the device as possiblewith a direct connection from VINC and AGND.