SLVSFH6C January   2021  – December 2021 TPS61094

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
      1. 7.1.1 The Configuration of VCHG Pin, ICHG Pin, and OSEL Pin
        1. 7.1.1.1 OSEL: Output Voltage Selection
        2. 7.1.1.2 VCHG: Charging Termination Voltage Selection
        3. 7.1.1.3 ICHG: Charging Output Current Selection
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout
      2. 7.3.2 Enable and Soft Start
      3. 7.3.3 Active Pulldown for the EN and MODE Pins
      4. 7.3.4 Current Limit Operation
      5. 7.3.5 Output Short-to-Ground Protection
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation Mode Setting
      2. 7.4.2 Forced Bypass Mode Operation
      3. 7.4.3 True Shutdown Mode Operation
      4. 7.4.4 Forced Buck Mode Operation
      5. 7.4.5 Auto Buck or Boost Mode Operation
        1. 7.4.5.1 Three States (Boost_on, Buck_on, and Supplement) Transition
        2. 7.4.5.2 Boost, Bypass, and Pass-Through
        3. 7.4.5.3 PWM, PFM, and Snooze Modes in Boost Operation
          1. 7.4.5.3.1 PWM Mode
          2. 7.4.5.3.2 PFM Mode
          3. 7.4.5.3.3 Snooze Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application – 3.6-V Output Boost Converter with Bypass
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Programming the Output Voltage
        2. 8.2.2.2 Maximum Output Current
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
      3. 8.2.3 Application Curves
      4. 8.2.4 Typical Application – 3.3-V Output Boost Converter with Automatic Buck or Boost Function
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
          1. 8.2.4.2.1 Programming the Voltage and Current
        3. 8.2.4.3 Application Curves
  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 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.1 Overview

The TPS61094 is a 60-nA quiescent current synchronous bi-directional buck/boost converter with a bypass switch between the input and output. The TPS61094 can operate with a wide input voltage from 0.7 V to 5.5 V and output voltage from 2.7 V to 5.4 V. The device provides a ultra-low power solution optimized for applications that require ultra-low quiescent current, use a supercap or battery as a backup power supply, or both.

The TPS61094 has four operation modes by the EN pin and MODE pin selection:

  • Auto buck or boost mode (EN = 1; MODE = 1)
  • Forced buck mode (EN = 1; MODE = 0)
  • Forced bypass mode (EN = 0; MODE = 0)
  • True shutdown mode (EN = 0; MODE = 1)

In Auto buck or Boost mode, the TPS61094 can automatically transform between Buck charging mode and Boost mode based on the input voltage. When the input voltage is lower than the setting boost regulation voltage, the TPS61094 generates a regulation voltage from the low input voltage of a supercap or a battery. When the input voltage is 0.1 V higher than the setting boost regulation voltage, the output voltage of the TPS61094 equals the input voltage. Meanwhile, the TPS61094 charges the backup supercap by Buck mode.

When the TPS61094 works in Forced buck mode, the TPS61094 connects the output of the device directly to the input while the buck converter outputs a setting constant current charging a backup supercap. When the supercap is charged to a pre-set termination voltage, the buck converter stops charging. When the supercap voltage drops 75 mV below the setting voltage, the buck converter starts charging the supercap again.

In Forced bypass mode, the TPS61094 turns on the bypass MOSFET, thus the output voltage equals to input voltage. The TPS61094 has approximately 4-nA IQ in this mode.

In True shutdown mode, the TPS61094 can disconnect the load from the input and SUP pin.