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LM2594xx SIMPLE SWITCHER Power Converter, 150-kHz, 0.5-A, Step-Down Voltage Regulator
SNVS118F
december 1999 – may 2023
LM2594
,
LM2594HV
PRODUCTION DATA
CONTENTS
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LM2594xx SIMPLE SWITCHER Power Converter, 150-kHz, 0.5-A, Step-Down Voltage Regulator
1
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics – 3.3 V
7.6
Electrical Characteristics – 5 V
7.7
Electrical Characteristics – 12 V
7.8
Electrical Characteristics – Adjustable
7.9
Electrical Characteristics – All Output Voltage Versions
7.10
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Delayed Start-Up
8.3.2
Undervoltage Lockout
8.3.3
Inverting Regulator
8.3.4
Inverting Regulator Shutdown Methods
8.4
Device Functional Modes
8.4.1
Discontinuous Mode Operation
9
Application and Implementation
9.1
Application Information
9.1.1
Input Capacitor (CIN)
9.1.2
Output Capacitor (COUT)
9.1.3
Catch Diode
9.1.4
Inductor Selection
9.1.5
Output Voltage Ripple and Transients
9.1.6
Open Core Inductors
9.2
Typical Applications
9.2.1
Series Buck Regulator (Fixed Output)
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Custom Design with WEBENCH® Tools
9.2.1.2.2
Inductor Selection (L1)
9.2.1.2.3
Output Capacitor Selection (COUT)
9.2.1.2.4
Catch Diode Selection (D1)
9.2.1.2.5
Input Capacitor (CIN)
9.2.1.3
Application Curves
9.2.2
Series Buck Regulator (Adjustable Output)
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.2.1
Programming Output Voltage
9.2.2.2.2
Inductor Selection (L1)
9.2.2.2.3
Output Capacitor Selection (COUT)
9.2.2.2.4
Feedforward Capacitor (CFF)
9.2.2.2.5
Catch Diode Selection (D1)
9.2.2.2.6
Input Capacitor (CIN)
9.2.2.3
Application Curves
9.3
Power Supply Recommendations
9.4
Layout
9.4.1
Layout Guidelines
9.4.2
Layout Example
9.4.3
Thermal Considerations
10
Device and Documentation Support
10.1
Device Support
10.1.1
Development Support
10.1.1.1
Custom Design with WEBENCH® Tools
10.2
Receiving Notification of Documentation Updates
10.3
Support Resources
10.4
Trademarks
10.5
Electrostatic Discharge Caution
10.6
Glossary
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
D|8
MSOI002K
P|8
MPDI001B
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs118f_oa
snvs118f_pm
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