ZHCSLU7A September 2020 – August 2021 TPS54618C-Q1
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Fixed Frequency PWM Control
- 7.3.2 Slope Compensation and Output Current
- 7.3.3 Bootstrap Voltage (Boot) and Low Dropout Operation
- 7.3.4 Error Amplifier
- 7.3.5 Voltage Reference
- 7.3.6 Adjusting the Output Voltage
- 7.3.7 Enable and Adjusting Undervoltage Lockout
- 7.3.8 Soft-Start Pin
- 7.3.9 Sequencing
- 7.3.10 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- 7.3.11 Overcurrent Protection
- 7.3.12 Frequency Shift
- 7.3.13 Reverse Overcurrent Protection
- 7.3.14 Synchronize Using the RT/CLK Pin
- 7.3.15 Power Good (PWRGD Pin)
- 7.3.16 Overvoltage Transient Protection
- 7.3.17 Thermal Shutdown
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Step One: Select the Switching Frequency
- 8.2.2.2 Step Two: Select the Output Inductor
- 8.2.2.3 Step Three: Choose the Output Capacitor
- 8.2.2.4 Step Four: Select the Input Capacitor
- 8.2.2.5 Step Five: Choose the Soft-Start Capacitor
- 8.2.2.6 Step Six: Select the Bootstrap Capacitor
- 8.2.2.7 Step Eight: Select Output Voltage and Feedback Resistors
- 8.2.2.8 Step Nine: Select Loop Compensation Components
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
6.7 Typical Characteristics
Figure 6-1 High-Side and Low-Side ON-Resistance vs Junction Temperature
Figure 6-3 High-Side Current Limit vs Junction Temperature
Figure 6-5 Switching Frequency vs RT Resistance Low Frequency Range
Figure 6-7 Transconductance vs Junction Temperature
Figure 6-9 Enable Pin Voltage vs Junction Temperature
Figure 6-11 EN Pin Current vs Junction Temperature
Figure 6-13 Input Voltage vs Junction Temperature
Figure 6-15 Shutdown Supply Current vs Input Voltage
Figure 6-17 Supply Current vs Input Voltage
Figure 6-19 PWRGD ON-Resistance vs Junction Temperature
Figure 6-21 Efficiency vs Load Current
Figure 6-23 Efficiency vs Load Current
Figure 6-2 Switching Frequency vs Junction Temperature
Figure 6-4 Voltage Reference vs Junction Temperature
Figure 6-6 Switching Frequency vs Vsense
Figure 6-8 Transconductance (Soft-Start) vs Junction Temperature
Figure 6-10 EN Pin Current vs Junction Temperature
Figure 6-12 Charge Current vs Junction Temperature
Figure 6-14 Shutdown Supply Current vs Junction Temperature
Figure 6-16 Supply Current vs Junction Temperature
Figure 6-18 PWRGD Threshold vs Junction Temperature
Figure 6-20 SS/TR to VSENSE Offset vs Junction Temperature
Figure 6-22 Efficiency vs Load Current
Figure 6-24 Efficiency vs Load Current