SLVS577E March   2007  – December 2014

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application
  5. 5 Revision History
  6. 6 Device Options
  7. 7 Pin Configuration and Functions
  8. 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. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Controller Circuit
        1. 10.3.1.1 Synchronous Operation
        2. 10.3.1.2 Down Regulation
        3. 10.3.1.3 Device Enable
        4. 10.3.1.4 Softstart and Short-Circuit Protection
        5. 10.3.1.5 Current Limit
        6. 10.3.1.6 Undervoltage Lockout
        7. 10.3.1.7 Thermal Shutdown
    4. 10.4 Device Functional Modes
      1. 10.4.1 Power Save Mode
      2. 10.4.2 Down Conversion Mode
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Programming the Output Voltage
        2. 11.2.2.2 Programming the UVLO Threshold Voltage
        3. 11.2.2.3 Inductor Selection
        4. 11.2.2.4 Capacitor Selection
          1. 11.2.2.4.1 Input Capacitor
          2. 11.2.2.4.2 Output Capacitor
          3. 11.2.2.4.3 Capacitor at VAUX
      3. 11.2.3 Application Curves
    3. 11.3 System Examples
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
    3. 13.3 Thermal Considerations
  14. 14Device and Documentation Support
    1. 14.1 Related Links
    2. 14.2 Trademarks
    3. 14.3 Electrostatic Discharge Caution
    4. 14.4 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

1 Features

  • More than 90% Efficiency at
    • 300 mA Output Current at 3.3 V
      (VIN ≥ 2.4 V)
    • 600 mA Output Current at 5 V (VIN ≥ 3 V)
  • Automatic Transition between Boost Mode and Down Conversion Mode
  • Device Quiescent Current Less than 55 μA
  • Startup into Full Load at 0.5 V Input Voltage
  • Operating Input Voltage Range from
    0.3 V to 5.5 V
  • Programmable Undervoltage Lockout Threshold
  • Output Short Circuit Protection Under all Operating Conditions
  • Fixed and Adjustable Output Voltage Options from 1.8 V to 5.5 V
  • Power Save Mode for Improved Efficiency at Low Output Power
  • Forced Fixed Frequency Operation Possible
  • Load Disconnect During Shutdown
  • Overtemperature Protection
  • Small 3 mm x 3 mm VSON-10 Package

2 Applications

  • All Single-Cell, Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products
  • Fuel Cell And Solar Cell Powered Products
  • Portable Audio Players
  • PDAs
  • Cellular Phones
  • Personal Medical Products
  • White LED Driver

3 Description

The TPS6120x devices provide a power supply solution for products powered by either a single-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. It is also used in fuel cell or solar cell powered devices where the capability of handling low input voltages is essential. Possible output currents depend on the input to output voltage ratio. The devices provide output currents of up to 600 mA at a 5-V output, while using a single-cell Li-Ion or Li-Polymer battery and discharges it down to 2.6 V. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters the Power Save mode to maintain a high efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The average input current is limited to a maximum value of 1500 mA. The output voltage is programmed by an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. The device is packaged in a 10-pin VSON package measuring 3 mm x 3 mm.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS6120x VSON (10) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Typical Application

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