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

#### 8.2.1.2.10 EN/UVLO Resistors - RUV1, RUV2

The UVLO resistors R1 (RUV2) and R2 (RUV1) set the input undervoltage lockout threshold and hysteresis according to Equation 20 and Equation 21.

Equation 20.
Equation 21.

From the Electrical Characteristics table, IUVLO(HYS) = 20 µA (typical). To design for a VIN rising threshold (VIN, UVLO(rising)) of 10 V and hysteresis of 2.5 V, Equation 20 and Equation 21 yield RUV1 = 17.98 kΩ and RUV2 = 125 kΩ. Selecting 1% standard values of R2 (RUV1) = 18.2 kΩ and R1 (RUV2) = 127 kΩ result in UVLO rising threshold and hysteresis voltages of 9.89 V and 2.54 V, respectively.