JAJSKV7A
June 2021 – September 2022
LM5168-Q1
,
LM5169-Q1
PRODUCTION DATA
1
特長
2
アプリケーション
3
概要
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
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
Control Architecture
8.3.2
Internal VCC Regulator and Bootstrap Capacitor
8.3.3
Internal Soft Start
8.3.4
On-Time Generator
8.3.5
Current Limit
8.3.6
N-Channel Buck Switch and Driver
8.3.7
Synchronous Rectifier
8.3.8
Enable, Undervoltage Lockout (EN/UVLO)
8.3.9
Power Good (PGOOD)
8.3.10
Thermal Protection
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Active Mode
8.4.3
Sleep Mode
9
Application and Implementation
9.1
Application Information
9.2
Typical Fly-Buck™ Converter Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Switching Frequency (RT)
9.2.2.2
Transformer Selection
9.2.2.3
Output Capacitor Selection
9.2.2.4
Secondary Output Diode
9.2.2.5
Setting Output Voltage
9.2.2.6
Input Capacitor
9.2.2.7
Type-3 Ripple Network
9.2.2.8
CBST Selection
9.2.2.9
Minimum Secondary Output Load
9.2.2.10
Example Design Summary
9.2.3
Application Curves
9.3
Typical Buck Application
9.3.1
Design Requirements
9.3.2
Detailed Design Procedure
9.3.2.1
Switching Frequency (RT)
9.3.2.2
Buck Inductor Selection
9.3.2.3
Setting the Output Voltage
9.3.2.4
Type-3 Ripple Network
9.3.2.5
Output Capacitor Selection
9.3.2.6
Input Capacitor Considerations
9.3.2.7
CBST Selection
9.3.2.8
Example Design Summary
9.3.3
Application Curves
9.4
Power Supply Recommendations
9.5
Layout
9.5.1
Thermal Considerations
9.5.2
Typical EMI Results
9.5.3
Layout Guidelines
9.5.3.1
Compact PCB Layout for EMI Reduction
9.5.3.2
Feedback Resistors
9.5.4
Layout Example
10
Device and Documentation Support
10.1
Device Support
10.1.1
Third-Party Products Disclaimer
10.2
Documentation Support
10.2.1
Related Documentation
10.3
Receiving Notification of Documentation Updates
10.4
サポート・リソース
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Mechanical, Packaging, and Orderable Information
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)
DDA|8
MPDS092F
サーマルパッド・メカニカル・データ
DDA|8
PPTD058I
発注情報
jajskv7a_oa
9.3.2
Detailed Design Procedure