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LM5140-Q1 Wide Input Range Dual Synchronous Buck Controller
SNVSA02A
January 2016 – December 2016
LM5140-Q1
PRODUCTION DATA.
CONTENTS
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LM5140-Q1 Wide Input Range Dual Synchronous Buck Controller
1
Features
2
Applications
3
Description
4
Revision History
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
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
High Voltage Start-up Regulator
7.3.2
VCC Regulator
7.3.3
Oscillator
7.3.4
SYNIN and SYNOUT
7.3.5
Enable
7.3.6
Power Good
7.3.7
Output Voltage
7.3.8
Minimum Output Voltage Adjustment
7.3.9
Current Sense
7.3.10
DCR Current Sensing
7.3.11
Error Amplifier and PWM Comparator
7.3.12
Slope Compensation
7.4
Device Functional Modes
7.4.1
Hiccup Mode Current Limiting
7.4.2
Standby Mode
7.4.3
Soft Start
7.4.4
Diode Emulation
7.4.5
High and low-side Drivers
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
Inductor Calculation
8.2.2.2
Current Sense Resistor
8.2.2.3
Output Capacitor
8.2.2.4
Input Filter
8.2.2.5
EMI Filter Design
8.2.2.6
MOSFET Selection
8.2.2.7
Driver Slew Rate Control
8.2.2.8
Sub-Harmonic Oscillation
8.2.2.9
Control Loop
8.2.2.10
Error Amplifier
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Community Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RWG|40
MPQF420
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsa02a_oa
snvsa02a_pm
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