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
3 說明
TPS54020 是一款 10A、4.5V 到 17V 輸入 SWIFT 轉換器。該器件采用創新型 3.5mm × 3.5mm HotRod 封裝，能夠優化高密度降壓設計。TPS54020 是一款功能全面的轉換器。
通過高側和低側 MOSFET 的創新集成和封裝實現了高效率。TPS54020 可在較高的負載條件下保持持續電流模式 (CCM) 運行，并能夠在跳過脈沖時切換到 Eco 模式以提升輕載效率。
兩個 MOSFET 上的電流限制提供器件和系統的保護。高側 MOSFET 內的逐周期電流限制在過載情況下提供保護。低側 MOSFET 零電流檢測在輕負載運行時關閉低側 MOSFET。共有三種限流閾值可供選擇，能夠適用于多種應用。也可選擇一個斷續或逐周期過流保護機制。
當芯片溫度超過熱關斷觸發點時，熱關斷保護禁用開關，而在內置熱滯后和關斷斷續時間后啟用開關。
器件信息
| 器件型號 | 封裝(1) | 封裝尺寸（標稱值） |
|---|---|---|
| TPS54020 | VQFN (15) | 3.50mm x 3.50mm |
(1) 如需了解所有可用封裝，請見數據表末尾的可訂購產品附錄。
簡化版應用電路原理圖
效率與負載電流間的關系