SNVSB88A
August 2021 – October 2021
LM5158-Q1
,
LM51581-Q1
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and 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
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Line Undervoltage Lockout (EN/UVLO/SYNC Pin)
9.3.2
High Voltage VCC Regulator (BIAS, VCC Pin)
9.3.3
Soft Start (SS Pin)
9.3.4
Switching Frequency (RT Pin)
9.3.5
Dual Random Spread Spectrum – DRSS (MODE Pin)
9.3.6
Clock Synchronization (EN/UVLO/SYNC Pin)
9.3.7
Current Sense and Slope Compensation
9.3.8
Current Limit and Minimum On Time
9.3.9
Feedback and Error Amplifier (FB, COMP Pin)
9.3.10
Power-Good Indicator (PGOOD Pin)
9.3.11
Hiccup Mode Overload Protection (MODE Pin)
9.3.12
Maximum Duty Cycle Limit and Minimum Input Supply Voltage
9.3.13
Internal MOSFET (SW Pin)
9.3.14
Overvoltage Protection (OVP)
9.3.15
Thermal Shutdown (TSD)
9.4
Device Functional Modes
9.4.1
Shutdown Mode
9.4.2
Standby Mode
9.4.3
Run Mode
9.4.3.1
Spread Spectrum Enabled
9.4.3.2
Hiccup Mode Protection Enabled
10
Application and Implementation
10.1
Application Information
10.2
Typical Boost Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Custom Design With WEBENCH® Tools
10.2.2.2
Recommended Components
10.2.2.3
Inductor Selection (LM)
10.2.2.4
Output Capacitor (COUT)
10.2.2.5
Input Capacitor
10.2.2.6
Diode Selection
10.2.3
Application Curve
10.3
System Examples
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Examples
13
Device and Documentation Support
13.1
Device Support
13.1.1
Third-Party Products Disclaimer
13.1.2
Development Support
13.1.2.1
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)
RTE|16
MPQF149D
Thermal pad, mechanical data (Package|Pins)
RTE|16
QFND630A
Orderable Information
snvsb88a_oa
snvsb88a_pm
10.3
System Examples
Figure 10-3
Typical Boost Application
Figure 10-4
Typical SEPIC Application
Figure 10-5
LIDAR Bias Supply 1 (DCM Operation)
Figure 10-6
LIDAR Bias Supply 2 (CCM Operation)
Figure 10-7
Low-Cost Single String LED Driver
Figure 10-8
Secondary-Side Regulated Isolated Flyback
Figure 10-9
Primary-Side Regulated Multiple-Output Isolated Flyback/Isolated SEPIC
Figure 10-10
Typical Non-Isolated Flyback