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LM3670 Miniature Step-Down DC-DC Converter for Ultralow Voltage Circuits
SNVS250F
November 2004 – February 2016
LM3670
PRODUCTION DATA.
CONTENTS
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LM3670 Miniature Step-Down DC-DC Converter for Ultralow Voltage Circuits
1
Features
2
Applications
3
Description
4
Revision History
5
Connection Diagram
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
Circuit Operation
7.3.2
Soft Start
7.3.3
LDO - Low Dropout Operation
7.4
Device Functional Modes
7.4.1
PWM Operation
7.4.1.1
Internal Synchronous Rectification
7.4.1.2
Current Limiting
7.4.2
PFM Operation
7.4.3
Shutdown
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Typical Application: Fixed Output
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Inductor Selection
8.2.1.2.1.1
Method 1
8.2.1.2.1.2
Method 2
8.2.1.2.2
Input Capacitor Selection
8.2.1.2.3
Output Capacitor Selection
8.2.1.3
Application Curves
8.2.2
Typical Application: Adjustable Output
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Output Voltage Selection for Adjustable LM3670
8.2.2.3
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
11.2
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)
DBV|5
MPDS018T
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs250f_oa
snvs250f_pm
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