ZHCSI81L February 2009 – May 2018 LM26420
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 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機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.3.1 Soft Start
This function forces VOUT to increase at a controlled rate during start-up in a controlled fashion, which helps reduce inrush current and eliminate overshoot on VOUT. During soft start, reference voltage of the error amplifier ramps from 0 V to its nominal value of 0.8 V in approximately 600 µs. If the converter is turned on into a pre-biased load, then the feedback begins ramping from the prebias voltage but at the same rate as if it had started from 0 V. The two outputs start up ratiometrically if enabled at the same time, see Figure 28 below.
Figure 28. LM26420 Soft-Start