SLVSAQ5E March   2012  – May 2017 TPS62125

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout
      2. 7.3.2 Enable Comparator (EN / EN_hys)
      3. 7.3.3 Power Good Output and Output Discharge (PG)
      4. 7.3.4 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Pulse Width Modulation (PWM) Operation
      2. 7.4.2 Power-Save Mode
      3. 7.4.3 100% Duty Cycle Low Dropout Operation
      4. 7.4.4 Soft-Start
      5. 7.4.5 Short-Circuit Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Output Voltage Setting
        2. 8.2.2.2 Enable Threshold and Hysteresis Setting
        3. 8.2.2.3 Power Good (PG) Pullup and Output Discharge Resistor
        4. 8.2.2.4 Output Filter Design (Inductor and Output Capacitor)
        5. 8.2.2.5 Inductor Selection
        6. 8.2.2.6 Output Capacitor Selection
        7. 8.2.2.7 Input Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
      1. 8.3.1 TPS62125 5-V Output Voltage Configuration
      2. 8.3.2 TPS62125 5-V VOUT
      3. 8.3.3 TPS62125 Operation From a Storage Capacitor Charged From a 0.5 mA Current Source
      4. 8.3.4 5 V to -5 V Inverter Configuration
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  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 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

1 Features

  • Wide Input Voltage Range 3 V to 17 V
  • Input Supply Voltage Supervisor (SVS) With Adjustable Threshold and Hysteresis Consuming Typical 6-µA Quiescent Current
  • Wide Output Voltage Range 1.2 V to 10 V
  • Typical 13-µA Quiescent Current
  • 350-nA Typical Shutdown Current
  • Seamless Power Save Mode Transition
  • DCS-Control™ Scheme
  • Low Output Ripple Voltage
  • Up to 1-MHz Switching Frequency
  • Highest Efficiency over Wide VIN and VOUT Range
  • Pin to Pin Compatible with TPS62160/70
  • 100% Duty Cycle Mode
  • Power Good Open Drain Output
  • Output Discharge Function
  • Small 2-mm × 2-mm 8-pin WSON Package

2 Applications

  • Embedded Processing
  • 4-Cell Alkaline, 1- to 4-Cell Li-Ion Battery-Powered Applications
  • 9-V to 15-V Standby Power Supply
  • Energy Harvesting
  • Inverter (Negative VOUT)

3 Description

The TPS62125 device is a high-efficiency synchronous step-down converter optimized for low and ultralow power applications providing up to 300-mA output current. The wide input voltage range of 3 V to 17 V supports 4-cell alkaline and 1- to 4-cell Li-Ion batteries in series configuration as well as 9-V to 15-V powered applications. The device includes a precise low-power enable comparator which can be used as an input supply voltage supervisor (SVS) to address system specific power-up and power-down requirements. The enable comparator consumes only 6-µA quiescent current and features an accurate threshold of 1.2 V typical as well as an adjustable hysteresis. With this feature, the converter can generate a power supply rail by extracting energy from a storage capacitor fed from high impedance sources such as solar panels or current loops. With its DCS-Control scheme the converter provides power-save mode operation to maintain highest efficiency over the entire load current range. At light loads the converter operates in pulse frequency modulation (PFM) mode and transitions seamlessly and automatically in pulse width modulation (PWM) mode at higher load currents. The DCS-Control™ scheme is optimized for low-output ripple voltage in PFM mode in order to reduce output noise to a minimum and features excellent AC load regulation. An open-drain power good output indicates once the output voltage is in regulation.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS62125 WSON (8) 2.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic

TPS62125 TPS62125_app_3.3V.gif

Efficiency vs Input Voltage

TPS62125 effvs_VIN_3.3V_VLF302515_15uH.gif