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

5 Pin Configuration and Functions

DGS and DPR Packages
10-Pin VSSOP and WSON
Top View

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
COMP 3 I Feedback to the inverting input of the PWM comparator, through a 3:1 divider. The output duty cycle increases as the voltage to this pin increases. Internally there is a 5-kΩ pullup resistor to 5.2 V.
CS 8 I Current sense input for the current limit detection. If voltage to this pin exceeds 0.5 V the outputs are disabled and the soft-start (SS) pin is discharged to ground.
GND 7 — Connections to external ground must be done with care for optimum performance. See Feature Description and Application and Implementation for more information.
OUT1 5 O Alternating output gate driver, which can source and sink 1.5 A.
OUT2 6 O Alternating output gate driver, which can source and sink 1.5 A.
REF 2 O Sink only, requires an external pullup resistor. This can be used as a 2.5-V precision output reference for external circuitry.
RT/SYNC 9 I Oscillator timing resistor pin and synchronization input. An external resistor to ground sets the oscillator frequency. This pin also accepts AC-coupled synchronization pulses from an external source.
SS 10 I Soft-start pin. An internal 10-µA current source and an external capacitor set the soft-start timing. This pin can be externally pulled to below 0.5 V to disable the output drivers.
VCC 4 I/O 9.6-V output from the internal high voltage series pass regulator. An external voltage, 10 V to 15 V, can be applied to this pin to shutdown the internal regulator, reducing internal dissipation. An internal diode connects VCC to VIN.
VIN 1 I Input to the start-up regulator. Input range from 15 V to 90 V, with transient capability to 100 V.
Exposed Pad(1) — — The exposed die attach pad on the WSON package must be connected to a PCB thermal pad at ground potential. See AN-1187 Leadless Leadframe Package (LLP) (SNOA401).
(1) Only available on the WSON package.