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LM284x SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT
SNVS540K
March 2009 – April 2019
LM2840
,
LM2841
,
LM2842
PRODUCTION DATA.
CONTENTS
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LM284x SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT
1
Features
2
Applications
3
Description
Device Images
Typical Application Circuit
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
Protection
7.4
Device Functional Modes
7.4.1
Continuous Conduction Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Setting the Output Voltage
8.2.2.3
Inductor Selection
8.2.2.4
Input Capacitor
8.2.2.5
Output Capacitor
8.2.2.6
Bootstrap Capacitor
8.2.2.7
Soft-Start Components
8.2.2.8
Shutdown Operation
8.2.2.9
Schottky Diode
8.2.3
Application Curves
8.2.4
Other Application Circuits
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
Development Support
11.1.2.1
Custom Design With WEBENCH® Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Related Links
11.4
Receiving Notification of Documentation Updates
11.5
Community Resources
11.6
Trademarks
11.7
Electrostatic Discharge Caution
11.8
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DDC|6
MPDS124I
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs540k_oa
snvs540k_pm
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DATA SHEET
LM284x SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT
1
Features
Input voltage 4.5 V to 42 V
Output current options of 100 mA, 300 mA, and 600 mA
Feedback pin voltage of 0.765 V
550-kHz (X) or 1.25-MHz (Y) switching frequency
Low shutdown I
Q
: 16-µA typical
Short-circuit protected
Internally compensated
Soft-start circuitry
Small overall solution size (SOT-6L package)
Create a custom design using the LM2840 (or LM2841/42) with the
WEBENCH® Power Designer
2
Applications
Battery-powered equipment
Industrial distributed power applications
Portable media players
Portable hand-held instruments
