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LMR38015 SIMPLE SWITCHER Power Converter, 4.2V to 80V, 1.5A, Synchronous Buck Converter With 40µA IQ
SNVSCM6
February 2024
LMR38015
PRODUCTION DATA
CONTENTS
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LMR38015 SIMPLE SWITCHER Power Converter, 4.2V to 80V, 1.5A, Synchronous Buck Converter With 40µA IQ
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
System Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed Frequency Peak Current Mode Control
7.3.2
Adjustable Output Voltage
7.3.3
Enable
7.3.4
Switching Frequency and Synchronization (RT/SYNC)
7.3.5
Power-Good Flag Output
7.3.6
Minimum On Time, Minimum Off Time, and Frequency Foldback
7.3.7
Bootstrap Voltage
7.3.8
Overcurrent and Short-Circuit Protection
7.3.9
Soft Start
7.3.10
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Auto Mode
7.4.2
Forced PWM Operation
7.4.3
Dropout
7.4.4
Minimum Switch On Time
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
Custom Design With WEBENCH® Tools
8.2.2.2
Choosing the Switching Frequency
8.2.2.3
FB for Adjustable Output
8.2.2.4
Inductor Selection
8.2.2.5
Output Capacitor Selection
8.2.2.6
Input Capacitor Selection
8.2.2.7
CBOOT
8.2.2.8
External UVLO
8.2.2.9
Maximum Ambient Temperature
8.2.3
Application 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
Third-Party Products Disclaimer
9.1.2
Development Support
9.1.2.1
Custom Design With WEBENCH® Tools
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)
DRR|12
MPSS085A
Thermal pad, mechanical data (Package|Pins)
DRR|12
PPTD377
Orderable Information
snvscm6_oa
snvscm6_pm
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Data Sheet
LMR38015
SIMPLE SWITCHER
Power Converter, 4.2V to 80V,
1.5A
, Synchronous Buck Converter With 40µA I
Q
1
Features
Functional Safety-Capable
Documentation available to aid functional safety system design
Configured for rugged
industrial
applications
4.2V to 80V input voltage range
1.5A
continuous output current
Ultra-low 40µA operating quiescent current
200kHz to 2.2MHz adjustable switching frequency
Frequency synchronization to external clock
97% maximum duty cycle
Supports start-up events with prebiased output
±1.5% reference voltage tolerance over temperature
Precision enable
Easy to use with integrated compensation network enabling low BOM count
Integrated synchronous rectification
12-pin WSON wettable flank with
PowerPAD™
integrated circuit package
PFM and forced PWM (FPWM) options
Spread Spectrum option available
Create a custom design using the
LMR38015
with the
WEBENCH®
Power Designer
