SLVSDR8B April   2018  – February 2023 TPS62147 , TPS62148

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Schematic
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Precise Enable
      2. 9.3.2 Power Good (PG)
      3. 9.3.3 MODE
      4. 9.3.4 Undervoltage Lockout (UVLO)
      5. 9.3.5 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Pulse Width Modulation (PWM) Operation
      2. 9.4.2 Power Save Mode Operation (PWM/PFM)
      3. 9.4.3 100% Duty-Cycle Operation
      4. 9.4.4 Current Limit And Short Circuit Protection (for TPS62148)
      5. 9.4.5 HICCUP Current Limit And Short Circuit Protection (for TPS62147)
      6. 9.4.6 Soft Start / Tracking (SS/TR)
      7. 9.4.7 Output Discharge Function (TPS62148 only)
      8. 9.4.8 Starting into a Pre-Biased Load
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Programming the Output Voltage
      2. 10.1.2 External Component Selection
      3. 10.1.3 Inductor Selection
      4. 10.1.4 Capacitor Selection
        1. 10.1.4.1 Output Capacitor
        2. 10.1.4.2 Input Capacitor
        3. 10.1.4.3 Soft-Start Capacitor
      5. 10.1.5 Tracking Function
      6. 10.1.6 Output Filter and Loop Stability
    2. 10.2 Typical Applications
      1. 10.2.1 Typical Application with Adjustable Output Voltage
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 LED Power Supply
      2. 10.3.2 Powering Multiple Loads
      3. 10.3.3 Voltage Tracking
      4. 10.3.4 Precise Soft-Start Timing
    4. 10.4 Power Supply Recommendations
    5. 10.5 Layout
      1. 10.5.1 Layout Guidelines
      2. 10.5.2 Layout Example
      3. 10.5.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

8.1 Schematic

GUID-B5FE5067-8B85-4A9B-8224-D919A4A3879E-low.gifFigure 8-1 Measurement Setup with FSEL = high
Table 8-1 List of Components for FSEL = high (fsw = 2.5 MHz)
REFERENCEDESCRIPTIONMANUFACTURER
IC17 V, 2 A Step-Down ConverterTPS62147; Texas Instruments
L1 µH inductorXFL4020-102; Coilcraft
CIN10 µF, 25 V, Ceramic, 0805TMK212BBJ106MG-T; Taiyo Yuden
COUT2 × 10 µF, 16 V, Ceramic, 0805; all VOUT except 9 V and 1.2 VEMK212BBJ106MG-T; Taiyo Yuden
COUT3 × 10 µF, 16 V, Ceramic, 0805 for VOUT = 1.2 VEMK212BBJ106MG-T; Taiyo Yuden
COUT4 × 10 µF, 16 V, Ceramic, 0805 for VOUT = 9 VEMK212BBJ106MG-T; Taiyo Yuden
CSS3.3 nF, 10 V, Ceramic, X7R-
R1Depending on Vout; see Table 10-4Standard 1% metal film
R2Depending on Vout; see Table 10-4Standard 1% metal film
R3470 kΩ, Chip, 0603, 1/16 W, 1%Standard 1% metal film
GUID-B339C39C-01F4-4E7B-AC8F-2D410495773C-low.gifFigure 8-2 Measurement Setup with FSEL = low
Table 8-2 List of Components for FSEL = low (fsw = 1.25 MHz)
REFERENCEDESCRIPTIONMANUFACTURER(1)
IC17 V, 2 A Step-Down ConverterTPS62147; Texas Instruments
L2.2 µH inductorXFL4020-222; Coilcraft
CIN10 µF, 25 V, Ceramic, 0805TMK212BBJ226MG-T; Taiyo Yuden
COUT2 × 22 µF, 16 V, Ceramic, 0805; all VOUT except 9 V and 1.2 VEMK212BBJ226MG-T; Taiyo Yuden
COUT3 × 22 µF, 16 V, Ceramic, 0805 for VOUT = 1.2 V and VOUT = 9 VEMK212BBJ226MG-T; Taiyo Yuden
CSS3.3 nF, 10 V, Ceramic, X7R-
R1Depending on Vout; see Table 10-4Standard 1% metal film
R2Depending on Vout; see Table 10-4Standard 1% metal film
R3470 kΩ, Chip, 0603, 1/16 W, 1%Standard 1% metal film