ZHCSOA1A July 2021 – July 2021 TPS548B27
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 Internal VCC LDO and Using External Bias on VCC Pin
- 7.3.2 Enable
- 7.3.3 Output Voltage Setting
- 7.3.4 Internal Fixed Soft Start and External Adjustable Soft Start
- 7.3.5 External REFIN For Output Voltage Tracking
- 7.3.6 Frequency and Operation Mode Selection
- 7.3.7 D-CAP3 Control
- 7.3.8 Low-Side FET Zero-Crossing
- 7.3.9 Current Sense and Positive Overcurrent Protection
- 7.3.10 Low-Side FET Negative Current Limit
- 7.3.11 Power Good
- 7.3.12 Overvoltage and Undervoltage Protection
- 7.3.13 Out-Of-Bounds (OOB) Operation
- 7.3.14 Output Voltage Discharge
- 7.3.15 UVLO Protection
- 7.3.16 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 Output Voltage Setting Point
- 8.2.2.2 Choose the Switching Frequency and the Operation Mode
- 8.2.2.3 Choose the Inductor
- 8.2.2.4 Set the Current Limit (TRIP)
- 8.2.2.5 Choose the Output Capacitor
- 8.2.2.6 Choose the Input Capacitors (CIN)
- 8.2.2.7 Soft-Start Capacitor (SS/REFIN Pin)
- 8.2.2.8 EN Pin Resistor Divider
- 8.2.2.9 VCC Bypass Capacitor
- 8.2.2.10 BOOT Capacitor
- 8.2.2.11 PGOOD Pullup Resistor
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10布局
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
3 說明
TPS548B27 器件是一款具有自適應導通時間 D-CAP3 控制模式的高效率、小尺寸同步降壓轉換器。該器件不需要外部補償，因此易于使用并且僅需要很少的外部元件。該器件非常適合空間受限的數據中心應用。
TPS548B27 器件具有差分遙感功能和高性能集成 MOSFET，在整個工作結溫范圍具有高精度 (±1%) 0.6V 電壓基準。該器件具有快速負載瞬態響應、精確負載調節和線路調節、跳躍模式或 FCCM 運行以及可編程軟啟動功能。
TPS548B27 是一款無鉛器件，完全符合 RoHS 標準，無需豁免。
器件信息
| 器件型號 | 封裝(1) | 封裝尺寸（標稱值） |
|---|---|---|
| TPS548B27 | VQFN-FCRLF (19) | 4.00mm × 3.00mm |
(1) 如需了解所有可用封裝，請參閱數據表末尾的可訂購產品附錄。
簡化版應用效率與輸出電流間的關系