SNVS029L March   2000  – June 2025 LM2678

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics – 3.3 V
    6. 5.6  Electrical Characteristics – 5 V
    7. 5.7  Electrical Characteristics – 12 V
    8. 5.8  Electrical Characteristics – Adjustable
    9. 5.9  Electrical Characteristics – All Output Voltage Versions
    10. 5.10 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Switch Output
      2. 6.3.2 Input
      3. 6.3.3 C Boost
      4. 6.3.4 Ground
      5. 6.3.5 Feedback
      6. 6.3.6 ON/OFF
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Active Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Design Considerations
      2. 7.1.2 Inductor
      3. 7.1.3 Output Capacitor
      4. 7.1.4 Input Capacitor
      5. 7.1.5 Catch Diode
      6. 7.1.6 Boost Capacitor
      7. 7.1.7 Additional Application Information
    2. 7.2 Typical Application
      1. 7.2.1 All Output Voltage Versions
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 7.2.1.2.2 Capacitor Selection Guides
        3. 7.2.1.3 Application Curves
      2. 7.2.2 Fixed Output Voltage Design Example
        1. 7.2.2.1 Detailed Design Procedure
          1. 7.2.2.1.1 Capacitor Selection
      3. 7.2.3 Adjustable Output Design Example
        1. 7.2.3.1 Detailed Design Procedure
          1. 7.2.3.1.1 Capacitor Selection
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 VSON Package Devices

5.9 Electrical Characteristics – All Output Voltage Versions

Specifications are for TA = TJ = 25°C, VIN = 12 V for the 3.3-V, 5-V, and adjustable versions, and VIN = 24 V for the 12-V version (unless otherwise noted).
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
IQQuiescent currentVFEEDBACK = 8 V for 3.3-V, 5-V, and adjustable versions,
VFEEDBACK = 15 V for 12-V version		4.26mA
ISTBYStandby quiescent currentON/ OFF pin = 0 VTJ = 25°C50100µA
TJ = –40°C to 125°C150
ICLCurrent limitTJ = 25°C6.178.3A
TJ = –40°C to 125°C5.758.75
ILOutput leakage currentVIN = 40 V, ON/ OFF pin = 0 VVSWITCH = 0 V200µA
VSWITCH = –1 V1615mA
RDS(ON)Switch ON-ResistanceISWITCH = 5 ATJ = 25°C0.120.14Ω
TJ = –40°C to 125°C0.225
fOOscillator frequencyMeasured at switch pinTJ = 25°C260kHz
TJ = –40°C to 125°C225280
DDuty cycleMaximum duty cycle91%
Minimum duty cycle0%
IBIASFeedback bias
current		VFEEDBACK = 1.3 V (adjustable version only)85nA
VON/OFFON/OFF threshold voltageTJ = 25°C1.4V
TJ = –40°C to 125°C0.82
ION/OFFON/OFF input currentON/OFF input = 0 VTJ = 25°C20μA
TJ = –40°C to 125°C45