ZHCSF29E May 2016 – January 2021 TPS25940-Q1
PRODMIX
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parametric Measurement Information
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9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3 Feature Description
- 9.4 Device Functional Modes
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10Application and Implementation
- 10.1 Application Information
- 10.2
Typical Application
- 10.2.1 Design Requirements
- 10.2.2
Detailed Design Procedure
- 10.2.2.1 Step by Step Design Procedure
- 10.2.2.2 Programming the Current-Limit Threshold: R(ILIM) Selection
- 10.2.2.3 Undervoltage Lockout and Overvoltage Set Point
- 10.2.2.4 Programming Current Monitoring Resistor—RIMON
- 10.2.2.5 Setting Output Voltage Ramp Time (tdVdT)
- 10.2.2.6 Programing the Power Good Set Point
- 10.2.2.7 Support Component Selections—R6, R7 and CIN
- 10.2.3 Application Curves
- 10.2.4 System Examples
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
9.4.2 Shutdown Control
The internal FET and hence the load current can be remotely switched off by taking the UVLO pin below its 0.6-V threshold with an open collector or open drain device as shown in Figure 9-8. The device quiescent current is reduced to less than 20 μA in this state. Upon releasing the UVLO pin the device turns on with soft-start cycle.
Figure 9-8 Shutdown Control