SNVS082E December   2001  – May 2016 LM2593HV

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 Voltage 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 Negative Voltage Charge Pump
      3. 8.3.3 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 lnverting Regulator
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductors 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 Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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订购信息

7 Parameter Measurement Information

7.1 Test Circuits

LM2593HV standard_test_circuits_layout_guides_01_snvs082.gif
Component Values shown are for VIN = 15 V,
VOUT = 5 V, ILOAD = 2 A.
CIN — 470-µF, 50-V aluminum electrolytic Nichicon PM Series
COUT — 220-µF, 25-V aluminum electrolytic Nichcon PM Series
D1 — 3.3-A, 60-V Schottky Rectifier, 21DQ06 (international rectifier)
L1 — 33 µH, see Inductors Selection Procedure
Figure 23. Fixed Output Voltage Versions
LM2593HV standard_test_circuits_layout_guides_02_snvs082.gif
Select R1 to be approximately 1 kΩ, use a 1% resistor for best stability.
Component values shown are for VIN = 20 V,
VOUT = 10 V, ILOAD = 2 A.
CIN — 470-µF, 35-V aluminum electrolytic Nichicon PM Series
COUT — 220-µF, 35-V aluminum electrolytic Nichicon PM Series
D1 — 3.3-A, 60-V Schottky Rectifier, 21DQ06 (international rectifier)
L1 — 47 µH, see Inductors Selection Procedure
R1 — 1 kΩ, 1%
R2 — 7.15 k, 1%
CFF — 3.3 nF
Typical Values
CSS — 0.1 µF
CDELAY — 0.1 µF
RPULL UP — 4.7 k (use 22 k if VOUT is ≥ 45 V)
† Resistive divider is required to avoid exceeding maximum rating of 45 V, 3 mA on or into flag pin.
†† Small signal Schottky diode to prevent damage to feedback pin by negative spike when output is shorted (CFF not being able to discharge immediately will drag feedback pin below ground). Required if VIN > 40 V.
Figure 24. Adjustable Output Voltage Versions