SNVSB49D
April 2018 – September 2020
LMR36015
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and Functions
Pin Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Timing Requirements
8.7
System Characteristics
8.8
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Power-Good Flag Output
9.3.2
Enable and Start-up
9.3.3
Current Limit and Short Circuit
9.3.4
Undervoltage Lockout and Thermal Shutdown
9.4
Device Functional Modes
9.4.1
Auto Mode
9.4.2
Forced PWM Operation
9.4.3
Dropout
9.4.4
Minimum Switch On-Time
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design 1: Low Power 24-V, 1.5-A PFM Converter
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.2.1
Custom Design With WEBENCH Tools
10.2.1.2.2
Choosing the Switching Frequency
10.2.1.2.3
Setting the Output Voltage
10.2.1.2.4
Inductor Selection
10.2.1.2.5
Output Capacitor Selection
10.2.1.2.6
Input Capacitor Selection
10.2.1.2.7
CBOOT
10.2.1.2.8
VCC
10.2.1.2.9
CFF Selection
10.2.1.2.9.1
External UVLO
10.2.1.2.10
Maximum Ambient Temperature
10.2.2
Application Curves
10.2.3
Design 2: High Density 24-V, 1.5-A FPWM Converter
10.2.3.1
Design Requirements
10.2.3.2
Detailed Design Procedure
10.2.3.3
Application Curves
10.3
What to Do and What Not to Do
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.1.1
Ground and Thermal Considerations
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
Development Support
13.1.1.1
Custom Design With WEBENCH® Tools
13.2
Documentation Support
13.2.1
Related Documentation
13.3
Receiving Notification of Documentation Updates
13.4
Support Resources
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RNX|12
MPQF465A
Thermal pad, mechanical data (Package|Pins)
RNX|12
QFND580A
Orderable Information
snvsb49d_oa
snvsb49d_pm
10.2.3.2
Detailed Design Procedure
See
Section 10.2.1.2
.