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LMR38010-Q1 4.2V to 80V, 1A, Automotive, Synchronous SIMPLE SWITCHER Power Converter With 40µA IQ
SNVSC72B
February 2023 – January 2024
LMR38010-Q1
PRODUCTION DATA
CONTENTS
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LMR38010-Q1 4.2V to 80V, 1A, Automotive, Synchronous SIMPLE SWITCHER Power 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)
DDA|8
MPDS092F
Thermal pad, mechanical data (Package|Pins)
DDA|8
PPTD178C
Orderable Information
snvsc72b_oa
snvsc72b_pm
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Data Sheet
LMR38010-Q1
4.2V to 80V,
1A
,
Automotive,
Synchronous
SIMPLE SWITCHER
Power Converter With 40µA I
Q
1
Features
AEC-Q100 qualified for automotive applications
Temperature grade 1: –40°C to +125°C, T
A
Functional Safety-Capable
Documentation available to aid functional safety system design
Configured for rugged
automotive
applications
4.2V to 80V input voltage range
1A
continuous output current
Ultra-low 40µA operating quiescent current
> 1.5mm distance between VIN and GND pin
200kHz to 2.2MHz adjustable switching frequency
Frequency synchronization to external clock
Spread spectrum for reduced EMI
97% maximum duty cycle
Support start-up with prebiased output
±1.0% tolerance voltage reference at room temperature
Precision enable
Easy to use device with integrated compensation network enabling low BOM count
Integrated synchronous rectification
8-pin HSOIC with
PowerPAD™
integrated circuit package
PFM and forced PWM (FPWM) options
Available in 2A,
LMR38020-Q1
Create a custom design using the
LMR38010-Q1
with the
WEBENCH®
Power Designer
2
Applications
Automotive Inverter and motor control
Automotive DC/DC converters
Automotive battery management system
Automotive 48V mild hybrid ECU bias supplies