ZHCSLU7A
September 2020 – August 2021
TPS54618C-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Typical Characteristics
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
7.4.1
Simple Small Signal Model for Peak Current Mode Control
7.4.2
Small Signal Model for Frequency Compensation
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
8.2.2.7.1
Output Voltage Limitations
8.2.2.8
Step Nine: Select Loop Compensation Components
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Power Dissipation Estimate
11
Device and Documentation Support
11.1
Device Support
11.1.1
Developmental Support
11.2
接收文档更新通知
11.3
支持资源
11.4
Trademarks
11.5
静电放电警告
11.6
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RTE|16
MPQF149D
散热焊盘机械数据 (封装 | 引脚)
RTE|16
QFND290G
订购信息
zhcslu7a_oa
zhcslu7a_pm
8.2.3
Application Curves
Figure 8-2
Efficiency vs Load Current
1-A Load Step
Figure 8-4
Transient Response
Figure 8-6
Power Up, V
OUT
, EN
I
OUT
= 2A
Figure 8-8
Input Ripple
Figure 8-10
Load Regulation vs Load Current
Figure 8-3
Efficiency vs Load Current
Figure 8-5
Power Up, V
OUT
, V
IN
I
OUT
= 0 A
Figure 8-7
Output Ripple
V
IN
= 3.3. V
I
OUT
= 2 A
Figure 8-9
Closed-Loop Response
Figure 8-11
Regulation vs Input Voltage