JAJSOR1E
June 2022 – August 2024
LM5177
PRODUCTION DATA
1
1
特長
2
アプリケーション
3
概要
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
Handling Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Parameter Measurement Information
6.1
Gate Driver Rise Time and Fall Time
6.2
Gate Driver Dead (Transition) Time
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Power-On Reset (POR System)
7.3.2
Buck-Boost Control Scheme
7.3.2.1
Boost Mode
7.3.2.2
Buck Mode
7.3.2.3
Buck-Boost Mode
7.3.3
Power Save Mode
7.3.4
Supply Voltage Selection – VMAX Switch
7.3.5
Enable and Undervoltage Lockout
7.3.6
Oscillator Frequency Selection
7.3.7
Frequency Synchronization
7.3.8
Voltage Regulation Loop
7.3.9
Output Voltage Tracking
7.3.10
Slope Compensation
7.3.11
Configurable Soft Start
7.3.12
Peak Current Sensor
7.3.13
Current Monitoring and Current Limit Control Loop
7.3.14
Short Circuit - Hiccup Protection
7.3.15
nFLT Pin and Protections
7.3.16
Device Configuration Pin
7.3.17
Dual Random Spread Spectrum – DRSS
7.3.18
Gate Driver
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
Custom Design with WEBENCH Tools
8.2.2.2
Frequency
8.2.2.3
Feedback Divider
8.2.2.4
Inductor and Current Sense Resistor Selection
8.2.2.5
Slope Compensation
8.2.2.6
Output Capacitor
8.2.2.7
Input Capacitor
8.2.2.8
UVLO Divider
8.2.2.9
Soft-Start Capacitor
8.2.2.10
MOSFETs QH1 and QL1
8.2.2.11
MOSFETs QH2 and QL2
8.2.2.12
Frequency Compensation
8.2.2.13
External Component Selection
8.2.3
Application Curves
8.3
System Examples
8.3.1
Bi-Directional Power Backup
8.3.2
Parallel (Multiphase) Operation
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Power Stage Layout
10.1.2
Gate Driver Layout
10.1.3
Controller Layout
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
サード・パーティ製品に関する免責事項
11.1.2
Development Support
11.1.2.1
Custom Design with WEBENCH Tools
11.2
ドキュメントの更新通知を受け取る方法
11.3
サポート・リソース
11.4
Trademarks
11.5
静電気放電に関する注意事項
11.6
用語集
12
Revision History
13
Mechanical, Packaging, and Orderable Information
10.1
Layout Guidelines