SNVS084C December   2001  – July 2016 LM2590HV

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Electrical Characteristics - 3.3-V Version
    7. 6.7 Electrical Characteristics - 5-V Version
    8. 6.8 Electrical Characteristics - Adjustable Version
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Test Circuits
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Undervoltage Lockout
      2. 8.3.2 SHUTDOWN/SOFT-START
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Feedforward Capacitor, CFF
      2. 9.1.2 Input Capacitor, CIN
      3. 9.1.3 Output Capacitor, COUT
      4. 9.1.4 Catch Diode
      5. 9.1.5 Inverting Regulator
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection Procedure
          1. 9.2.2.1.1 Example 1: VIN ≤ 40 V, 5-V Version, VIN = 24 V, Output = 5 V at 1 A
          2. 9.2.2.1.2 Example 2: VIN > 40 V, 5-V Version, VIN = 48 V, Output = 5 V at 1.5 A
          3. 9.2.2.1.3 Example 3: VIN ≤ 40 V, Adjustable Version, VIN = 20 V, Output = 10 V at 2 A
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 3.3-V, 5-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range, 1.2 V to 57 V ±4% Max Over Line and Load Conditions
  • Ensured 1-A Output Load Current
  • Available in 7-Pin TO-220 and TO-263 (Surface-Mount) Package
  • Input Voltage Range Up To 60 V
  • 150-kHz Fixed Frequency Internal Oscillator
  • Shutdown and Soft-start
  • Out Of Regulation Error Flag
  • Error Flag Delay
  • Low Power Standby Mode, IQ: 90 µA (Typical)
  • High Efficiency
  • Thermal Shutdown And Current Limit Protection

2 Applications

  • Simple High-Efficiency Step-Down (Buck) Regulators
  • Efficient Preregulator For Linear Regulators
  • On-Card Switching Regulators
  • Positive-To-Negative Converters

3 Description

The LM2590HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3-V, 5-V, and an adjustable output version.

This series of switching regulators is similar to the LM2591HV with additional supervisory and control features.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, output error flag and flag delay.

The LM2590HV operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 7-pin TO-220 package with several different lead bend options, and a 7-pin TO-263 surface-mount package.

Other features include an ensured ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring 90-µA standby current (typical). Self protection features include a two stage current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM2590HV TO-220 (7) 14.99 mm × 10.16 mm
TO-263 (7) 10.10 mm × 8.89 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application (Fixed Output Voltage Versions)

LM2590HV typ_app_snvs084.gif