JAJS472C
August 2010 – April 2018
TPS54320
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
Device Images
概略回路図
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
Fixed Frequency PWM Control
7.3.2
Continuous Current Mode Operation (CCM)
7.3.3
VIN and Power VIN Pins (VIN and PVIN)
7.3.4
Voltage Reference
7.3.5
Adjusting the Output Voltage
7.3.6
Safe Start-up into Prebiased Outputs
7.3.7
Error Amplifier
7.3.8
Slope Compensation
7.3.9
Enable and Adjusting UVLO
7.3.10
Slow Start (SS/TR)
7.3.11
Power Good (PWRGD)
7.3.12
Bootstrap Voltage (BOOT) and Low Dropout Operation
7.3.13
Sequencing (SS/TR)
7.3.14
Output Overvoltage Protection (OVP)
7.3.15
Overcurrent Protection
7.3.15.1
High-Side MOSFET Overcurrent Protection
7.3.15.2
Low-Side MOSFET Overcurrent Protection
7.3.16
Thermal Shutdown
7.3.17
Small Signal Model for Loop Response
7.3.18
Simple Small Signal Model for Peak Current Mode Control
7.3.19
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Adjustable Switching Frequency and Synchronization (RT/CLK)
7.4.2
Adjustable Switching Frequency (RT Mode)
7.4.3
Synchronization (CLK Mode)
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
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
UVLO 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
10.2
Layout Example
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
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
11.3
商標
11.4
静電気放電に関する注意事項
11.5
Glossary
12
メカニカル、パッケージ、および注文情報
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
RHL|14
MPQF252H
サーマルパッド・メカニカル・データ
発注情報
jajs472c_oa
jajs472c_pm
6.3
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
Input voltage range
VIN
4.5
17
V
Power stage input voltage range
PVIN
1.6
17
V
Output current
0
3
A
Operating junction temperature, T
J
–40
150
°C