SNVS499H
February 2007 – July 2015
LM5116
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Typical Application
4
Revision History
Pin Configuration and Functions
Pin Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Switching Characteristics
5.7
Typical Performance Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
High Voltage Start-Up Regulator
6.3.2
Enable
6.3.3
UVLO
6.3.4
Oscillator and Sync Capability
6.3.5
Error Amplifier and PWM Comparator
6.3.6
Ramp Generator
6.3.7
Current Limit
6.3.8
HO Ouput
6.3.9
Thermal Protection
6.4
Device Functional Modes
6.4.1
Soft-Start and Diode Emulation
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
Custom Design with WEBENCH Tools
7.2.2.2
Timing Resistor
7.2.2.3
Output Inductor
7.2.2.4
Current Sense Resistor
7.2.2.5
Ramp Capacitor
7.2.2.6
Output Capacitors
7.2.2.7
Input Capacitors
7.2.2.8
VCC Capacitor
7.2.2.9
Bootstrap Capacitor
7.2.2.10
Soft Start Capacitor
7.2.2.11
Output Voltage Divider
7.2.2.12
UVLO Divider
7.2.2.13
MOSFETs
7.2.2.14
MOSFET Snubber
7.2.2.15
Error Amplifier Compensation
7.2.2.16
Comprehensive Equations
7.2.2.16.1
Current Sense Resistor and Ramp Capacitor
7.2.2.16.2
Modulator Transfer Function
7.2.2.16.3
Error Amplifier Transfer Function
7.2.3
Application Curves
8
Power Supply Recommendations
9
Layout
9.1
Layout Guidelines
9.2
Layout Example
10
Device and Documentation Support
10.1
Custom Design with WEBENCH Tools
10.2
Receiving Notification of Documentation Updates
10.3
Device Support
10.3.1
Third-Party Products Disclaimer
10.3.2
Design Support
10.4
Community Resources
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
PWP|20
MHTS001G
Thermal pad, mechanical data (Package|Pins)
PWP|20
PPTD289
Orderable Information
snvs499h_oa
snvs499h_pm
1
Features
Emulated Peak Current Mode
Wide Operating Range Up to 100 V
Low I
Q
Shutdown (< 10 µA)
Drives Standard or Logic Level
MOSFETs
Robust 3.5-A Peak Gate Drive
Free-run or Synchronous Operation to 1 MHz
Optional Diode Emulation Mode
Programmable Output from 1.215 V to 80 V
Precision 1.5% Voltage Reference
Programmable Current Limit
Programmable Soft-Start
Programmable Line Undervoltage Lockout
Automatic Switch to External Bias Supply
HTSSOP-20 Exposed Pad
Thermal Shutdown
Create a Custom Design Using the LM5116 with the
WEBENCH Power Designer