ZHCS360F
July 2012 – November 2020
TPS54020
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Description (Continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings (1)
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
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
8.3.15.1
High-side MOSFET Overcurrent Protection
8.3.15.2
Low-side MOSFET Overcurrent Protection
8.3.16
Thermal Shutdown
8.4
Device Functional Modes
8.4.1
Single-Supply Operation
8.4.2
Split Rail Operation
8.4.3
Continuous Current Mode Operation (CCM)
8.4.4
Eco-mode Light-Load Efficiency Operation
8.4.5
Adjustable Switching Frequency (RT Mode)
8.4.6
Synchronization (CLK Mode)
9
Application and Implementation
9.1
Application Information
9.1.1
Small Signal Model for Loop Response
9.1.2
Simple Small Signal Model for Peak Current Mode Control
9.1.3
Small Signal Model for Frequency Compensation
9.1.4
Designing the Device Loop Compensation
9.1.4.1
Step One: Determine the Crossover Frequency (fC)
9.1.4.2
Step Two: Determine a Value for R6
9.1.4.3
Step Three: Calculate the Compensation Zero.
9.1.4.4
Step Four: Calculate the Compensation Noise Pole.
9.1.4.5
Step Five: Calculate the Compensation Phase Boost Zero.
9.1.5
Fast Transient Considerations
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
9.2.2.4.1
Response to a Load Transient
9.2.2.4.2
Output Voltage Ripple
9.2.2.4.3
Bus Capacitance
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
9.2.2.9.1
Minimum Output Voltage
9.2.2.10
Compensation Component Selection
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Examples
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.1.1.1
Custom Design With WEBENCH® Tools
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Receiving Notification of Documentation Updates
12.4
Support Resources
12.5
Trademarks
12.6
Electrostatic Discharge Caution
12.7
Glossary
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RUW|15
MPQF246
散热焊盘机械数据 (封装 | 引脚)
RUW|15
QFND244B
订购信息
zhcs360f_oa
zhcs360f_pm
1
特性
–40°C 至 +150°C 的工作结温范围
集成 8mΩ 和 6mΩ MOSFET
热增强型 3.5mm × 3.5mm
HotRod™
封装
峰值电流模式控制
{21}Eco-mode{22} 脉冲跳跃,可实现更高的效率
对两个 MOSFET 进行过流保护
可选过流保护方案
可选过流保护等级
分离电源轨:PVIN 上的电压为 1.6V 至 17V
0.6V 电压基准,精度为 ±1%
200kHz 至 1.2MHz 开关频率
与外部时钟同步
启动至预偏置输出
过热和过压保护
可调软启动和电源排序
针对欠压及过压提供电源良好输出监控器
SYNC_OUT 功能提供输出时钟信号的 180° 相移
如欲获取
SWIFT™
文档和 WEBENCH,请访问
http://www.ti.com/swift
使用 TPS54020 并借助
WEBENCH®
Power Designer
创建定制设计