SNOSC66D MARCH   2012  – September 2016 LM3017

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 True Shutdown
      2. 7.3.2 Operation of the EN/MODE Pin
      3. 7.3.3 EN/MODE Control
      4. 7.3.4 Overvoltage Protection
      5. 7.3.5 Thermal Protection
      6. 7.3.6 Current Limit Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Boost Mode
      3. 7.4.3 Standby Mode
      4. 7.4.4 Start-Up Boost Mode
      5. 7.4.5 Pass-Through Mode
      6. 7.4.6 Start-Up Pass-Through Mode
  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  Programming the Output Voltage
        2. 8.2.2.2  Power Inductor Selection
        3. 8.2.2.3  Setting the Output Current
        4. 8.2.2.4  Additional Slope Compensation
        5. 8.2.2.5  Current Limit With Additional Slope Compensation
        6. 8.2.2.6  Power Diode Selection
        7. 8.2.2.7  Low-Side MOSFET Selection (Switching MOSFET)
        8. 8.2.2.8  Pass MOSFET Selection (High-Side MOSFET)
        9. 8.2.2.9  Input Capacitor Selection
        10. 8.2.2.10 Output Capacitor Selection
        11. 8.2.2.11 VCC Decoupling Capacitor
        12. 8.2.2.12 Slope Compensation Ramp
        13. 8.2.2.13 Control Loop Compensation
          1. 8.2.2.13.1 Compensation Network Components Calculations
          2. 8.2.2.13.2 Compensation Design Example
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Filter Capacitors
      2. 10.1.2 Sense Lines
      3. 10.1.3 Compact Layout
      4. 10.1.4 Ground Plane and Vias
    2. 10.2 Layout Examples
    3. 10.3 Thermal Considerations
  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

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订购信息

5 Pin Configuration and Functions

NKL Package
10-Pin WQFN
Top View
LM3017 po_nosc66.gif

Pin Functions

PIN TYPE(1) DESCRIPTION
NO. NAME
1 VCC O Driver supply voltage pin: output of internal regulator powering low side NMOS driver. A minimum of 0.47 µF must be connected from this pin to PGND for proper operation.
2 DR O Low-side NMOS gate driver output: output gate drive to low side NMOS gate.
3 PGND G Power ground: ground for power section. External power circuit reference. Must be connected to AGND at a single point.
4 VG O High side NMOS gate driver output: output gate drive to high side NMOS gate.
5 EN/MODE A Multi-function input pin: this input provides for chip enable, and mode selection. See Device Functional Modes for details.
6 FB A Feed-back input pin: negative input to error amplifier. Connect to feedback resistor tap to regulate output.
7 COMP A Compensation pin: a resistor and capacitor combination connected to this pin provides frequency compensation for the regulator control loop.
8 AGND G Analog ground: ground for analog control circuitry. Reference point for all stated voltages.
9 ISEN A Current sense input: current sense input, with respect to VIN, for all current limit functions.
10 VIN P Power supply input pin: input supply to regulator. See Application and Implementation for recommendations on bypass capacitors on this pin.
(1) A = Analog, G = Ground, O = Output, P = Power