SNVS402I
February 2006 – May 2021
LM5009
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
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
Control Circuit Overview
7.3.2
High Voltage Startup Regulator
7.3.3
Regulation Comparator
7.3.4
Overvoltage Comparator
7.3.5
On-Time Generator
7.3.6
Current Limit
7.3.7
N-Channel Buck Switch and Driver
7.3.8
Thermal Protection
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
Output Resistor Divider Selection
8.2.2.2
Frequency Selection
8.2.2.3
Inductor Selection
8.2.2.4
VCC and Bootstrap Capacitor
8.2.2.5
Output Capacitor Selection
8.2.2.6
Current Limit Off-Timer Setting
8.2.2.7
Rectifier Diode Selection
8.2.2.8
Input Capacitor Selection
8.2.2.9
Ripple Configuration
8.2.3
Application Curves
8.3
Do's and Don'ts
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
NGU|8
MPDS407A
DGK|8
MPDS028E
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs402i_oa
snvs402i_pm
6
Specifications