JAJSKO7D October   2020  – March 2022

PRODUCTION DATA

1. 特長
2. アプリケーション
3. 概要
4. Revision History
5. Device Comparison Table
6. Pin Configuration and Functions
7. Specifications
8. Detailed Description
1. 8.1 Overview
2. 8.2 Functional Block Diagram
3. 8.3 Feature Description
4. 8.4 Device Functional Modes
1. 8.4.1 Shutdown Mode
2. 8.4.2 Standby Mode
3. 8.4.3 Active Mode
9. Application and Implementation
1. 9.1 Application Information
2. 9.2 Typical Application
1. 9.2.1 Design Requirements
2. 9.2.2 Detailed Design Procedure
3. 9.2.3 Application Curves
3. 9.3 What to Do and What Not to Do
10. 10Power Supply Recommendations
11. 11Layout
1. 11.1 Layout Guidelines
2. 11.2 Layout Example
12. 12Device and Documentation Support
13. 13Mechanical, Packaging, and Orderable Information

• RPE|9
• RPE|9

#### 9.2.2.9 External UVLO

In some cases, an input UVLO level different than that provided internal to the device is needed. This can be accomplished by using the circuit shown in Figure 9-2. The input voltage at which the device turns on is designated as VON while the turn-off voltage is VOFF. First, a value for RENB is chosen in the range of 10 kΩ to 100 kΩ, then Equation 10 and Equation 11 are used to calculate RENT and VOFF respectively.

Figure 9-2 Setup for External UVLO Application
Equation 10. ${R}_{ENT}=\left(\frac{{V}_{ON}}{{V}_{EN-VOUT}}-1\right)*{R}_{ENB}$
Equation 11. ${V}_{OFF}={V}_{ON}*\left(1-\frac{{V}_{EN-HYS}}{{V}_{EN-VOUT}}\right)$

where

• VON is the VIN turn-on voltage.
• VOFF is the VIN turn-off voltage.