SLVS427D JUNE   2002  – May 2015 TPS61120 , TPS61121 , TPS61122

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  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
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Controller Circuit
      2. 9.3.2 Synchronous Rectifier
      3. 9.3.3 LDO
      4. 9.3.4 Device Enable
        1. 9.3.4.1 Undervoltage Lockout
        2. 9.3.4.2 Softstart
      5. 9.3.5 LDO Enable
      6. 9.3.6 Power Good
      7. 9.3.7 Low Battery Detector Circuit—LBI/LBO
      8. 9.3.8 Low-EMI Switch
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power Save Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Solution for Maximum Output Power
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Programming the Output Voltage
            1. 10.2.1.2.1.1 DC-DC Converter
            2. 10.2.1.2.1.2 LDO
          2. 10.2.1.2.2 Programming the LBI/LBO Threshold Voltage
          3. 10.2.1.2.3 Inductor Selection
          4. 10.2.1.2.4 Capacitor Selection
            1. 10.2.1.2.4.1 Input Capacitor
            2. 10.2.1.2.4.2 Output Capacitor DC-DC Converter
              1. 10.2.1.2.4.2.1 Small Signal Stability
            3. 10.2.1.2.4.3 Output Capacitor LDO
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Low Profile Solution, Maximum Height 1.8 mm
      3. 10.2.3 Dual Power Supply With Auxiliary Positive Output Voltage
      4. 10.2.4 Dual Power Supply With Auxiliary Negative Output Voltage
      5. 10.2.5 Single Output Using LDO as Filter
      6. 10.2.6 Dual Input Power Supply Solution
  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. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PW|16
  • RSA|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11 Power Supply Recommendations

The device is designed to operate from an input voltage supply range between 1.8 V and 5.5 V. This input supply must be well regulated. If the input supply is located more than a few inches from the converter, additional bulk capacitance may be required in addition to the ceramic bypass capacitors. An electrolytic or tantalum capacitor with a value of 47 μF is a typical choice.