JAJSBM7C
September 2011 – October 2017
TPS54623
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
効率と負荷電流との関係
4
改訂履歴
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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
VIN and Power VIN Pins (VIN and PVIN)
7.3.2
Voltage Reference
7.3.3
Adjusting the Output Voltage
7.3.4
Safe Start-up into Pre-Biased Outputs
7.3.5
Error Amplifier
7.3.6
Slope Compensation
7.3.7
Enable and Adjusting Undervoltage Lockout
7.3.8
Slow Start (SS/TR)
7.3.9
Power Good (PWRGD)
7.3.10
Bootstrap Voltage (BOOT) and Low Dropout Operation
7.3.11
Sequencing (SS/TR)
7.3.12
Output Overvoltage Protection (OVP)
7.3.13
Overcurrent Protection
7.3.13.1
High-side MOSFET Overcurrent Protection
7.3.13.2
Low-side MOSFET Overcurrent Protection
7.3.14
Thermal Shutdown
7.3.15
Small Signal Model for Loop Response
7.3.16
Simple Small Signal Model for Peak Current Mode Control
7.3.17
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Fixed Frequency PWM Control
7.4.2
Continuous Current Mode Operation (CCM)
7.4.3
Light Load Efficiency Operation
7.4.4
Adjustable Switching Frequency and Synchronization (RT/CLK)
7.4.4.1
Adjustable Switching Frequency (RT Mode)
7.4.4.2
Synchronization (CLK mode)
8
Application and Implementation
8.1
Application Information
8.1.1
Fast Transient Considerations
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Operating Frequency
8.2.2.3
Output Inductor Selection
8.2.2.4
Output Capacitor Selection
8.2.2.5
Input Capacitor Selection
8.2.2.6
Slow Start Capacitor Selection
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
Under Voltage Lockout Set Point
8.2.2.9
Output Voltage Feedback Resistor Selection
8.2.2.9.1
Minimum Output Voltage
8.2.2.10
Compensation Component Selection
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Estimated Circuit Area
10.2
Layout Examples
11
デバイスおよびドキュメントのサポート
11.1
デバイス・サポート
11.1.1
デベロッパー・ネットワークの製品に関する免責事項
11.1.2
開発サポート
11.1.3
WEBENCH®ツールによるカスタム設計
11.2
ドキュメントのサポート
11.2.1
関連資料
11.3
ドキュメントの更新通知を受け取る方法
11.4
コミュニティ・リソース
11.5
商標
11.6
静電気放電に関する注意事項
11.7
Glossary
12
メカニカル、パッケージ、および注文情報
8.2.3
Application Curves
Figure 32.
Load Transient
Figure 34.
Startup with EN
Figure 36.
Output Voltage Ripple With Full Load
Figure 38.
Closed Loop Response
Figure 40.
Load Regulation
Figure 42.
Maximum Ambient Temperature
vs Load Current
Figure 44.
Junction Temperature
vs IC Power Dissipation
Figure 46.
Efficiency vs Output Current
Figure 33.
Start-Up With VIN
Figure 35.
Start-Up With Pre-Bias
Figure 37.
Input Voltage Ripple with Full Load
Figure 39.
Line Regulation
Figure 41.
Tracking Performance
Figure 43.
Maximum Ambient Temperature
vs IC Power Dissipation
Figure 45.
Efficiency vs Load Current
Figure 47.
TPS54623 Hiccup Mode Current Limit