ZHCSY68D October 2008 – April 2025 LM5574-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
-
7 Application and Implementation
- 7.1 Application Information
- 7.2
Typical Application
- 7.2.1 Design Requirements
- 7.2.2
Detailed Design Procedure
- 7.2.2.1 Custom Design With WEBENCH? Tools
- 7.2.2.2 External Components
- 7.2.2.3 R3 (RT)
- 7.2.2.4 L1- Inductor
- 7.2.2.5 C3- Ramp Capacitor
- 7.2.2.6 C9 -Output Capacitor
- 7.2.2.7 D1 - Async Diode
- 7.2.2.8 C1- Input Capacitor
- 7.2.2.9 C8 - Vcc Capacitor
- 7.2.2.10 C7 - BST Capacitor
- 7.2.2.11 C4 - SS Capacitor
- 7.2.2.12 R5, R6 - Feedback Resistor
- 7.2.2.13 R1, R2, C2 - SD Pin Components
- 7.2.2.14 R4, C5, C6 - Compensation Components
- 7.2.3 Application Curves
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- PW|16
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.2.2.11 C4 - SS Capacitor
The capacitor at the SS pin determines the soft-start time, that is the time for the reference voltage and the output voltage, to reach the final regulated value. Equation 12 determines the time.
Equation 12. 
For this application, a C4 value of 0.01μF was chosen which corresponds to a soft-start time of 1ms.