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LM63635-Q1 3.5V to 36V, 3.25A, Automotive, Step-Down Voltage Converter
SNVSBK9G
November 2019 – November 2024
LM63635-Q1
PRODUCTION DATA
CONTENTS
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LM63635-Q1 3.5V to 36V, 3.25A, Automotive, Step-Down Voltage Converter
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
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
Timing Characteristics
6.7
Switching Characteristics
6.8
System Characteristics
6.9
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Sync/Mode Selection
7.3.2
Output Voltage Selection
7.3.3
Switching Frequency Selection
7.3.3.1
Spread Spectrum Option
7.3.4
Enable and Start-Up
7.3.5
RESET Flag Output
7.3.6
Undervoltage Lockout and Thermal Shutdown and Output Discharge
7.4
Device Functional Modes
7.4.1
Overview
7.4.2
Light Load Operation
7.4.2.1
Sync/FPWM Operation
7.4.3
Dropout Operation
7.4.4
Minimum On-time Operation
7.4.5
Current Limit and Short-Circuit Operation
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
Choosing the Switching Frequency
8.2.2.2
Setting the Output Voltage
8.2.2.2.1
CFF Selection
8.2.2.3
Inductor Selection
8.2.2.4
Output Capacitor Selection
8.2.2.5
Input Capacitor Selection
8.2.2.6
CBOOT
8.2.2.7
VCC
8.2.2.8
External UVLO
8.2.2.9
Maximum Ambient Temperature
8.2.3
Full Feature Design Example
8.2.4
Application Curves
8.2.5
EMI Performance Curves
8.3
Best Design Practices
8.4
Power Supply Recommendations
8.5
Layout
8.5.1
Layout Guidelines
8.5.1.1
Ground and Thermal Considerations
8.5.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Device Nomenclature
9.2
Documentation Support
9.2.1
Related Documentation
9.3
Receiving Notification of Documentation Updates
9.4
Support Resources
9.5
Trademarks
9.6
Electrostatic Discharge Caution
9.7
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
PWP|16
MPDS371A
DRR|12
MPSS085A
Thermal pad, mechanical data (Package|Pins)
PWP|16
PPTD262C
DRR|12
PPTD366A
Orderable Information
snvsbk9g_oa
snvsbk9g_pm
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Data Sheet
LM63635-Q1
3.5V to
36V
,
3.25A,
Automotive, Step-Down Voltage Converter