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  • TPS631000 1.5-A Output Current, High Power Density Buck-Boost Converter

    • SLVSFH3B October   2021  – June 2022 TPS631000

      PRODUCTION DATA  

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  • TPS631000 1.5-A Output Current, High Power Density Buck-Boost Converter
  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 Rating
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical 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 (UVLO)
      2. 7.3.2 Enable and Soft Start
      3. 7.3.3 Adjustable Output Voltage
      4. 7.3.4 Mode Selection (PFM/FPWM)
      5. 7.3.5 Reverse Current Operation
      6. 7.3.6 Protection Features
        1. 7.3.6.1 Input Overvoltage Protection
        2. 7.3.6.2 Output Overvoltage Protection
        3. 7.3.6.3 Short Circuit Protection
        4. 7.3.6.4 Thermal Shutdown
    4. 7.4 Device Functional Modes
  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 Custom Design with WEBENCH Tools
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 Input Capacitor Selection
        5. 8.2.2.5 Setting the Output Voltage
      3. 8.2.3 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. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design with WEBENCH Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DRL|8
    • MPCS002F
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • slvsfh3b_oa
  • slvsfh3b_pm
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DATA SHEET

TPS631000 1.5-A Output Current, High Power Density Buck-Boost Converter

1 Features

  • 1.6-V to 5.5-V input voltage range
    • Device input voltage > 1.65 V for start-up
  • 1.2-V to 5.3-V output voltage range (adjustable)
  • High output current capability, 3-A peak switch current
    • 2-A output current for VIN ≥ 3 V, VOUT = 3.3 V
    • 1.5-A output current for VIN ≥ 2.7 V, VOUT = 3.3 V
  • High efficiency over the entire load range
    • 8-μA typical quiescent current
    • Power save mode
  • 150-mV load-step response at a 1-A current step
  • Peak current buck-boost mode architecture
    • Seamless mode transition with < 20-mV output ripple
    • Forward and reverse current operation
    • Start-up into pre-biased outputs
    • Fixed-frequency operation with 2-MHz switching
  • Safety and robust operation features
    • Overcurrent protection and short-circuit protection
    • Integrated soft start with active ramp adoption
    • Overtemperature protection and overvoltage protection
    • True shutdown function with load disconnect
    • Forward and backward current limit
  • Small solution size
    • Small 1-µH inductor
    • Works with one 0805 output capacitor over the full VOUT range
  • Create a custom design using the TPS631000 with the WEBENCH® Power Designer

2 Applications

  • System pre-regulator (smartphone, tablet, terminal, telematics)
  • Point-of-load regulation (wired sensor, port/cable adapter, and dongle)
  • Fingerprint, camera sensors (electronic smart lock, IP network camera)
  • RF amplifier supply (smart sensors)
  • Voltage stabilizer (datacom, optical modules, cooling/heating)

3 Description

The TPS631000 is a constant frequency peak current mode control buck-boost converter. The device has a 3-A peak current limit (typical) and 1.6-V to 5.5-V input voltage range. The TPS631000 provides a power supply solution for system pre-regulators and voltage stabilizers.

Depending on the input voltage, the TPS631000 automatically operates in boost, buck, or in 3-cycle buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes happen at a defined duty cycle and avoid unwanted toggling within the modes to reduce output voltage ripple. 8-μA quiescent current and power save mode power enable the highest efficiency for light to no-load conditions.

The TPS631000 offers a very small solution size with a 1.2-mm × 2.1-mm SOT-583 package, a 1-μH inductor, and one 0805 output capacitor.

Device Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
TPS631000SOT-5831.6 mm × 2.1 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-ADE92E27-7F16-442F-B448-EBC19B4EC24A-low.gifTypical Application
Efficiency Target vs Output Current (VOUT = 3.3 V)

4 Revision History

Changes from Revision A (January 2022) to Revision B (June 2022)

  • Removed reference to PSMGo
  • Updated Table 8-2 Go
  • Updated Table 8-6 Go

Changes from Revision * (October 2021) to Revision A (January 2022)

  • Changed document status from Advance Information to Production DataGo

5 Pin Configuration and Functions

Figure 5-1 8-Pin DRL SOT-5X3 Package(Top View)
Table 5-1 Pin Functions
PIN I/O(1) DESCRIPTION
NAME NO.
VOUT 1 PWR Power stage output
LX2 2 PWR Inductor switching node of the boost stage
LX1 3 PWR Inductor switching node of the buck stage
VIN 4 PWR Supply input voltage
EN 5 I Device enable. Set High to enable and Low to disable. It must not be left floating.
MODE 6 I PFM/PWM selection. Set Low for power save mode, set High for forced PWM. It must not be left floating.
GND 7 PWR Power ground
FB 8 I Voltage feedback. Sensing pin
(1) PWR = power, I = input

 
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