SNVSAG9
March 2016
LM5022-Q1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings: LM5022-Q1
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
High Voltage Start-Up Regulator
7.3.2
Input Undervoltage Detector
7.3.3
Error Amplifier
7.3.4
Current Sensing and Current Limiting
7.3.5
PWM Comparator and Slope Compensation
7.3.6
Soft Start
7.3.7
MOSFET Gate Driver
7.3.8
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Oscillator, Shutdown, and SYNC
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
Switching Frequency
8.2.2.2
MOSFET
8.2.2.3
Output Diode
8.2.2.4
Boost Inductor
8.2.2.5
Output Capacitor
8.2.2.6
VCC Decoupling Capacitor
8.2.2.7
Input Capacitor
8.2.2.8
Current Sense Filter
8.2.2.9
RSNS, RS2 and Current Limit
8.2.2.10
Control Loop Compensation
8.2.2.11
Efficiency Calculations
8.2.2.11.1
Chip Operating Loss
8.2.2.11.2
MOSFET Switching Loss
8.2.2.11.3
MOSFET and RSNS Conduction Loss
8.2.2.11.4
Output Diode Loss
8.2.2.11.5
Input Capacitor Loss
8.2.2.11.6
Output Capacitor Loss
8.2.2.11.7
Boost Inductor Loss
8.2.2.11.8
Total Loss
8.2.2.11.9
Efficiency
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Filter Capacitors
10.1.2
Sense Lines
10.1.3
Compact Layout
10.1.4
Ground Plane and Shape Routing
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Design Support
11.2
Community Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DGS|10
MPDS035C
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsag9_oa
snvsag9_pm
4 Revision History
DATE
REVISION
NOTES
March 2016
*
Initial release.