ZHCS360F July 2012 – November 2020 TPS54020
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Description (Continued)
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Fixed Frequency PWM Control
- 8.3.2 Input Voltage and Power Input Voltage Pins (VIN and PVIN)
- 8.3.3 Voltage Reference (VREF)
- 8.3.4 Adjusting the Output Voltage
- 8.3.5 Safe Start-up into Prebiased Outputs
- 8.3.6 Error Amplifier
- 8.3.7 Slope Compensation
- 8.3.8 Enable and Adjusting Undervoltage Lockout
- 8.3.9 Adjustable Switching Frequency and Synchronization (RT/CLK)
- 8.3.10 Soft-Start (SS) Sequence
- 8.3.11 Power Good (PWRGD)
- 8.3.12 Bootstrap Voltage (BOOT) and Low Dropout Operation
- 8.3.13 Sequencing (SS)
- 8.3.14 Output Overvoltage Protection (OVP)
- 8.3.15 Overcurrent Protection
- 8.3.16 Thermal Shutdown
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Custom Design With WEBENCH? Tools
- 9.2.2.2 Operating Frequency
- 9.2.2.3 Output Inductor Selection
- 9.2.2.4 Output Capacitor Selection
- 9.2.2.5 Input Capacitor Selection
- 9.2.2.6 Soft-Start Capacitor Selection
- 9.2.2.7 Bootstrap Capacitor Selection
- 9.2.2.8 Undervoltage Lockout Set Point
- 9.2.2.9 Output Voltage Feedback Resistor Selection
- 9.2.2.10 Compensation Component Selection
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
7.6 Typical Characteristics
Figure 7-1 High-Side MOSFET On-Resistance vs Junction Temperature
Figure 7-3 Voltage Reference vs Junction Temperature
Figure 7-5 Shutdown Quiescent Current vs Junction Temperature
Figure 7-7 EN
Pin Pullup Current vs Junction Temperature, VEN = 1.1 V
Figure 7-9 Nonswitching Operating Current vs vs Junction Temperature
Figure 7-11 (VSS-VVSENSE) Offset vs Junction
Temperature
Figure 7-13 High-Side MOSFET Current Limit vs Junction Temperature, VIN = 12
V
Figure 7-15 BOOT-PH UVLO vs Junction Temperature
Figure 7-2 Low-Side MOSFET On-Resistance vs Junction Temperature
Figure 7-4 Oscillator Frequency vs Junction Temperature
Figure 7-6 EN
Pin Hysteresis Current vs Junction Temperature, VEN = 1.3
V
Figure 7-8 EN
Pin UVLO Threshold vs Junction Temperature, VVIN = 12 V
Figure 7-10 Soft-Start Charge Current vs Junction Temperature
Figure 7-12 Power-Good Threshold vs Junction Temperature
Figure 7-14 Minimum On-Time vs Temperature