ZHCSCY3E October   2014  – October 2018

PRODUCTION DATA.

1. 特性
2. 应用
3. 说明
1.     Device Images
4. 修订历史记录
5. Pin Configuration and Functions
6. Specifications
7. Detailed Description
1. 7.1 Overview
2. 7.2 Functional Block Diagram
3. 7.3 Feature Description
4. 7.4 Device Functional Modes
8. Application and Implementation
1. 8.1 Application Information
2. 8.2 Typical Applications
1. 8.2.1 LM5160 Synchronous Buck (10-V to 60-V Input, 5-V Output, 1.5-A Load)
2. 8.2.2 LM5160 Isolated Fly-Buck (18-V to 32-V Input, 12-V, 4.5-W Isolated Output)
3. 8.2.3 LM5160A Isolated Fly-Buck (18-V to 32-V Input, 12-V, 4.5-W Isolated Output)
3. 8.3 Do's and Don'ts
9. Power Supply Recommendations
10. 10Layout
11. 11器件和文档支持
1. 11.1 器件支持
1. 11.1.1 第三方产品免责声明
2. 11.1.2 开发支持
2. 11.2 文档支持
3. 11.3 相关链接
4. 11.4 接收文档更新通知
5. 11.5 社区资源
6. 11.6 商标
7. 11.7 静电放电警告
8. 11.8 术语表
12. 12机械、封装和可订购信息

• DNT|12

#### 8.2.1.2.6 Series Ripple Resistor - RESR

Select the series resistor such that sufficient ripple is injected at the feedback node (FB). The ripple voltage produced by RESR is proportional to the inductor ripple current. Therefore, select RESR based on the lowest inductor ripple current occurring at minimum input voltage. Calculate RESR usingEquation 17.

Equation 17.

With VO = 5 V, VREF = 2 V and ΔIL, min = 180 mA (at VIN, min= 10 V) as calculated in Equation 14, Equation 17 requires an RESR greater than or equal to 0.35 Ω. Selecting R7 (RESR) = 0.47 Ω results in approximately 150 mV of maximum output voltage ripple at VIN,max. For applications requiring lower output voltage ripple, use Type II or Type III ripple injection circuits as described inRipple Configuration.