SLVSB70B October   2013  – July 2018 TPS62085 , TPS62086 , TPS62087

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Typical Application Schematic
    1.     Typical Application Efficiency
  5. Revision History
  6. Device Options
  7. Pin Configuration and Functions
    1.     Pin Functions
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Power Save Mode
      2. 9.3.2 100% Duty Cycle Low Dropout Operation
      3. 9.3.3 Soft Start
      4. 9.3.4 Switch Current Limit and Hiccup Short-Circuit Protection
      5. 9.3.5 Undervoltage Lockout
      6. 9.3.6 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Enable and Disable
      2. 9.4.2 Power Good
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Custom Design With WEBENCH® Tools
        2. 10.2.2.2 Setting The Output Voltage
        3. 10.2.2.3 Output Filter Design
        4. 10.2.2.4 Inductor Selection
        5. 10.2.2.5 Capacitor Selection
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Considerations
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
      2. 13.1.2 Custom Design With WEBENCH® Tools
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Related Links
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

Design Requirements

For this design example, use the parameters listed in Table 2 as the input parameters.

Table 2. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE
Input voltage 2.5 V to 6 V
Output voltage 1.2 V
Output ripple voltage <20 mV
Maximum output current 3 A

Table 3 lists the components used for the example.

Table 3. List of Components

REFERENCE DESCRIPTION MANUFACTURER
C1 10 µF, Ceramic capacitor, 6.3 V, X7R, size 0805, GRM21BR71A106ME51L Murata
C2 22 µF, Ceramic capacitor, 6.3 V, X5R, size 0805, GRM21BR60J226ME39L Murata
L1 0.47 µH, Power Inductor, size 4 mm × 4 mm × 1.5 mm, XFL4015-471ME Coilcraft
R1 Depending on the output voltage, 1%, size 0603; 0 Ω for TPS62086, TPS62087 Std
R2 162 kΩ, Chip resistor, 1/16 W, 1%, size 0603; open for TPS62086, TPS62087 Std
R3 1 MΩ, Chip resistor, 1/16 W, 1%, size 0603 Std