SNVSBW0A
October 2022 – October 2023
LM64460-Q1
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
6.1
Wettable Flanks
6.2
Pinout Design for Clearance and FMEA
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Characteristics
7.7
Systems Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Input Voltage Range (VIN1, VIN2)
8.3.2
Output Voltage Setpoint (FB)
8.3.3
Precision Enable and Input Voltage UVLO (EN)
8.3.4
MODE/SYNC Operation
8.3.4.1
Level-Dependent MODE/SYNC Control
8.3.4.2
Pulse-Dependent MODE/SYNC Control
8.3.5
Clock Locking
8.3.6
Power-Good Monitor (PGOOD)
8.3.7
Bias Supply Regulator (VCC, BIAS)
8.3.8
Bootstrap Voltage and UVLO (CBOOT)
8.3.9
Spread Spectrum
8.3.10
Soft Start and Recovery From Dropout
8.3.11
Overcurrent and Short-Circuit Protection
8.3.12
Thermal Shutdown
8.3.13
Input Supply Current
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Standby Mode
8.4.3
Active Mode
8.4.3.1
CCM Mode
8.4.3.2
AUTO Mode – Light-Load Operation
8.4.3.2.1
Diode Emulation
8.4.3.2.2
Frequency Foldback
8.4.3.3
FPWM Mode – Light-Load Operation
8.4.3.4
Minimum On-Time (High Input Voltage) Operation
8.4.3.5
Dropout
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Design 1 – Automotive Synchronous Buck Regulator at 2.1 MHz
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Custom Design With WEBENCH® Tools
9.2.1.2.2
Setting the Output Voltage
9.2.1.2.3
Choosing the Switching Frequency
9.2.1.2.4
Inductor Selection
9.2.1.2.5
Output Capacitor Selection
9.2.1.2.6
Input Capacitor Selection
9.2.1.2.7
Bootstrap Capacitor
9.2.1.2.8
VCC Capacitor
9.2.1.2.9
BIAS Power Connection
9.2.1.2.10
Feedforward Network
9.2.1.2.11
Input Voltage UVLO
9.2.1.3
Application Curves
9.3
Power Supply Recommendations
9.4
Layout
9.4.1
Layout Guidelines
9.4.1.1
Thermal Design and Layout
9.4.2
Layout Example
10
Device and Documentation Support
10.1
Device Support
10.1.1
Third-Party Products Disclaimer
10.1.2
Development Support
10.1.2.1
Custom Design With WEBENCH® Tools
10.2
Documentation Support
10.2.1
Related Documentation
10.3
Receiving Notification of Documentation Updates
10.4
Support Resources
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RYF|22
MPQF610A
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsbw0a_oa
snvsbw0a_pm
9.4.2
Layout Example
Figure 9-21
PCB Layout Example