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LM5007 75-V, 0.5-A DC/DC Buck Converter With 80-V Integrated Power MOSFET
SNVS252H
September 2003 – November 2018
LM5007
PRODUCTION DATA.
CONTENTS
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LM5007 75-V, 0.5-A DC/DC Buck Converter With 80-V Integrated Power MOSFET
1
Features
2
Applications
3
Description
Device Images
Typical Application Schematic
4
Revision History
5
Pin Configuration and Functions
Pin 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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Hysteretic Control Circuit Overview
7.3.2
High-Voltage Bias Supply Regulator
7.3.3
Overvoltage Comparator
7.3.4
On-Time Generator and Shutdown
7.3.5
Overcurrent Protection
7.3.6
N-Channel Buck Switch and Driver
7.3.7
Thermal Protection
7.3.8
Minimum Load Current
7.3.9
Ripple Configuration
7.4
Device Functional Modes
7.4.1
Standby Mode with VIN
7.4.2
Shutdown Mode
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
Custom Design With WEBENCH® Tools
8.2.2.2
Custom Design With Excel Quickstart Tool
8.2.2.3
Feedback Resistors, RFB1 and RFB2
8.2.2.4
Switching Frequency Selection, RON
8.2.2.5
Buck Inductor, L1
8.2.2.6
Output Capacitor, COUT
8.2.2.7
Type I Ripple Circuit, RC
8.2.2.8
Input Capacitor, CIN
8.2.2.9
Current Limit, RCL
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
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Custom Design With WEBENCH® Tools
11.1.3
Development Support
11.2
Documentation Support
11.2.1
Related Documentation
11.2.1.1
PCB Layout Resources
11.2.1.2
Thermal Design Resources
11.3
Community Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
NGT|8
MPDS406A
DGK|8
MPDS028E
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs252h_oa
snvs252h_pm
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DATA SHEET
LM5007 75-V, 0.5-A DC/DC Buck Converter With 80-V Integrated Power MOSFET
1
Features
Versatile Synchronous Buck DC/DC Converter
Operating Input Voltage Range of 9 V to 75 V
Integrated 80-V, 0.7-A N-Channel Buck Switch
Internal High-Voltage V
CC
Regulator
Adjustable Output Voltage
High Efficiency Operation
Adaptive Constant On-Time Control Architecture
Ultra-Fast Transient Response
No Control Loop Compensation Required
Nearly Constant Switching Frequency
PWM On-Time Varies Inversely with Input Voltage
Precision 2.5-V Reference
Low Input Quiescent Current
Inherent Protection Features for Robust Design
Intelligent Current Limit Protection
VCC and Gate Drive UVLO Protection
Thermal Shutdown Protection With Hysteresis
External Shutdown Control
8-Pin VSSOP and WSON Packages
Create a Custom Regulator Design Using
WEBENCH® Power Designer