SNVS397F
September 2005 – December 2025
LM5005
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Switching Characteristics
5.7
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
High-Voltage Start-Up Regulator
6.3.2
Shutdown and Standby
6.3.3
Oscillator and Synchronization Capability
6.3.4
Error Amplifier and PWM Comparator
6.3.5
RAMP Generator
6.3.6
Current Limit
6.3.7
Soft-Start Capability
6.3.8
MOSFET Gate Driver
6.4
Device Functional Modes
6.4.1
Shutdown Mode
6.4.2
Standby Mode
6.4.3
Light-Load Operation
6.4.4
Thermal Shutdown Protection
7
Application and Implementation
7.1
Application Information
7.1.1
Reducing Bias Power Dissipation
7.1.2
Input Voltage UVLO Protection
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
Custom Design With WEBENCH® Tools
7.2.2.2
Frequency Set Resistor (RT)
7.2.2.3
Inductor (LF)
7.2.2.4
Ramp Capacitor (CRAMP)
7.2.2.5
Output Capacitors (COUT)
7.2.2.6
Schottky Diode (DF)
7.2.2.7
Input Capacitors (CIN)
7.2.2.8
VCC Capacitor (CVCC)
7.2.2.9
Bootstrap Capacitor (CBST)
7.2.2.10
Soft Start Capacitor (CSS)
7.2.2.11
Feedback Resistors (RFB1 and RFB2)
7.2.2.12
RC Snubber (RS and CS)
7.2.2.13
Compensation Components (RC1, CC1, CC2)
7.2.2.14
Bill of Materials
7.2.3
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.1.1
PCB Layout for EMI Reduction
7.4.1.2
Thermal Design
7.4.1.3
Ground Plane Design
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Third-Party Products Disclaimer
8.2
Device Support
8.2.1
Development Support
8.2.1.1
Custom Design With WEBENCH® Tools
8.3
Documentation Support
8.3.1
Related Documentation
8.3.1.1
PCB Layout Resources
8.3.1.2
Thermal Design Resources
8.4
Receiving Notification of Documentation Updates
8.5
Support Resources
8.6
Trademarks
8.7
Electrostatic Discharge Caution
8.8
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
PWP|20
MHTS001H
Thermal pad, mechanical data (Package|Pins)
PWP|20
PPTD289A
Orderable Information
snvs397f_oa
snvs397f_pm
8.3.1.1
PCB Layout Resources
Texas Instruments,
AN-1149 Layout Guidelines for Switching Power Supplies
application note
Texas Instruments,
AN-1229
SIMPLE SWITCHER®
PCB Layout Guidelines
application note
Texas Instruments,
AN-2162 Simple Success With Conducted EMI From DC-DC Converters
application note
Texas Instruments,
Constructing Your Power Supply – Layout Considerations
seminar
Texas Instruments,
Low Radiated EMI Layout Made SIMPLE with LM4360x and LM4600x
application note
Texas Instruments,
Reduce Buck-Converter EMI and Voltage Stress by Minimizing Inductive Parasitics
analog design journal