SNVSBU7
September 2020
LM34966-Q1
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
Pin 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
Line Undervoltage Lockout (UVLO/SYNC/EN Pin)
8.3.2
High Voltage VCC Regulator (BIAS, VCC Pin)
8.3.3
Soft Start (SS Pin)
8.3.4
Switching Frequency (RT Pin)
8.3.5
Clock Synchronization (UVLO/SYNC/EN Pin)
8.3.6
Current Sense and Slope Compensation (CS Pin)
8.3.7
Current Limit and Minimum On-time (CS Pin)
8.3.8
Feedback and Error Amplifier (FB, COMP Pin)
8.3.9
Power-Good Indicator (PGOOD Pin)
8.3.10
Hiccup Mode Overload Protection
8.3.11
Maximum Duty Cycle Limit and Minimum Input Supply Voltage
8.3.12
MOSFET Driver (GATE Pin)
8.3.13
Overvoltage Protection (OVP)
8.3.14
Thermal Shutdown (TSD)
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Standby Mode
8.4.3
Run Mode
9
Application and Implementation
9.1
Power-On Hours (POH)
9.2
Application Information
9.3
Typical Application
9.3.1
Design Requirements
9.3.2
Detailed Design Procedure
9.3.2.1
Custom Design With WEBENCH® Tools
9.3.2.2
Recommended Components
9.3.2.3
Inductor Selection (LM)
9.3.2.4
Output Capacitor (COUT)
9.3.2.5
Input Capacitor
9.3.2.6
MOSFET Selection
9.3.2.7
Diode Selection
9.3.2.8
Efficiency Estimation
9.3.3
Application Curve
9.4
System Examples
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Examples
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.1.2
Development Support
12.1.2.1
Custom Design With WEBENCH® Tools
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
PWP|14
MPDS370A
Thermal pad, mechanical data (Package|Pins)
PWP|14
PPTD332B
Orderable Information
snvsbu7_oa
snvsbu7_pm
12.1.2
Development Support
For development support see the following:
LM5155x / LM5156x Boost Quick Start Calculator
LM5155x / LM5156x Flyback Quick Start Calculator
LM5155x / LM5156x SEPIC Quick Start Calculator
How to Design a Boost Converter Using LM5156x
How to Design an Isolated Flyback Converter Using LM5156x
How to Design a SEPIC Converter Using LM5156x