SNVS181C April   2004  – August 2016 LM5033

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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 High Voltage Start-Up Regulator (VIN and VCC)
      2. 7.3.2 Reference (REF)
      3. 7.3.3 PWM Comparator (COMP), Duty Cycle and Deadtime
      4. 7.3.4 Current Sense (CS)
      5. 7.3.5 Oscillator, Sync Capability (RT/SYNC)
      6. 7.3.6 Soft Start (SS)
      7. 7.3.7 OUT1 and OUT2
      8. 7.3.8 Thermal Protection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 VIN
        2. 8.2.2.2 VCC
        3. 8.2.2.3 Soft Start (SS)
        4. 8.2.2.4 Current Sense (CS)
        5. 8.2.2.5 Oscillator, Sync Input (RT/SYNC)
        6. 8.2.2.6 Deadtime Adjustment
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Internal High-Voltage (100 V) Start-Up Regulator
  • Single Resistor Oscillator Setting
  • Synchronizable
  • Precision Reference Output
  • Adjustable Soft Start
  • Overcurrent Protection
  • Direct Optocoupler Interface
  • 1.5-A Peak Gate Drivers
  • Thermal Shutdown

2 Applications

  • Intermediate DC-DC Bus Converter
  • Telecommunication Power Converters
  • Industrial Power Converters
  • 42-V Automotive Systems

3 Description

The LM5033 high-voltage PWM controller contains all the features necessary to implement push-pull, half-bridge, and full-bridge topologies. Applications include closed-loop voltage mode converters with a highly regulated output voltage, or open-loop DC transformers such as an Intermediate bus converter (IBC) with an efficiency greater than 95%. Two alternating gate driver outputs with a specified deadtime are provided.

The LM5033 includes a start-up regulator that operates over a wide input range from 15 V to 100 V. Additional features include: precision voltage reference output, current limit detection, remote shutdown, soft start, sync capability, and thermal shutdown. This high-speed IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM5033 VSSOP (10) 3.00 mm × 3.00 mm
WSON (10) 4.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

LM5033 typapp_circuit.gif