SLVSBO4C October   2012  – December 2014 TPS62736 , TPS62737

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3  Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Voltage Options
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 Handling Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Step-Down (Buck) Converter Operation
      2. 9.3.2 Programming OUT Regulation Voltage and VIN_OK
      3. 9.3.3 Nano-Power Management and Efficiency
    4. 9.4 Device Functional Modes
      1. 9.4.1 Enable Controls
      2. 9.4.2 Startup Behavior
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 TPS62737 3-Resistor Typical Application Circuit
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Inductor Selection
          2. 10.2.1.2.2 Output Capacitor Selection
          3. 10.2.1.2.3 Input Capacitor Selection
          4. 10.2.1.2.4 Resistor Selection
        3. 10.2.1.3 Application Curves
      2. 10.2.2 TPS62736 4-Resistor Typical Application Circuit
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • Industry's Highest Efficiency at Low Output Currents: > 90% With IOUT = 15 µA
  • Ultra-Low Power Buck Converter
    • TPS62736 Optimized for 50-mA Output Current
    • TPS62737 Optimized for 200-mA Output Current
    • 1.3-V to 5-V Resistor Programmable Output Voltage Range
    • 2-V to 5.5-V Input Operating Range
    • 380-nA and 375-nA Quiescent Current During Active Operation for TPS62736 and TPS62737
    • 10-nA Quiescent Current During Ship Mode Operation
    • 2% Voltage Regulation Accuracy
  • 100% Duty Cycle (Pass Mode)
  • EN1 and EN2 Control
    • Two Power-Off States:
      1. Shipmode (Full Power-Off State)
      2. Standby Mode Includes VIN_OK Indication
  • Input Power-Good Indication (VIN_OK)
    • Push-Pull Driver
    • Resistor Programmable Threshold Level

2 Applications

  • Ultra-Low Power Applications
  • 2-Cell and 3-Cell Alkaline-Powered Applications
  • Energy Harvesting
  • Solar Chargers
  • Thermal Electric Generator (TEG) Harvesting
  • Wireless Sensor Networks (WSN)
  • Low-Power Wireless Monitoring
  • Environmental Monitoring
  • Bridge and Structural Health Monitoring (SHM)
  • Smart Building Controls
  • Portable and Wearable Health Devices
  • Entertainment System Remote Controls

3 Description

The TPS6273x family provides a highly integrated ultra low power buck converter solution that is well suited for meeting the special needs of ultra-low power applications such as energy harvesting. The TPS6273x provides the system with an externally programmable regulated supply to preserve the overall efficiency of the power-management stage compared to a linear step-down converter. This regulator is intended to step-down the voltage from an energy storage element such as a battery or super capacitor to supply the rail to low-voltage electronics. The regulated output has been optimized to provide high efficiency across low-output currents (<10 µA) to high currents (200 mA).

The TPS6273x integrates an optimized hysteretic controller for low-power applications. The internal circuitry uses a time-based sampling system to reduce the average quiescent current.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS6273x VQFN (14) 3.50 mm × 3.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.
front_page_app_diag_slvsbno4.gif

Efficiency vs Output Current

eff_front_page_slvsbno4.gif