SNVSCS7D April   2025  – November 2025 TPSM33606-Q1 , TPSM33610-Q1 , TPSM33620-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Input Voltage Range
      2. 7.3.2  Output Voltage Selection
        1. 7.3.2.1 Adjustable Output Voltage Variants
        2. 7.3.2.2 Fixed Output Voltage Variants
      3. 7.3.3  Enable, Start-Up, and Shutdown
        1. 7.3.3.1 External UVLO through the EN Pin
      4. 7.3.4  External CLK SYNC
        1. 7.3.4.1 Pulse-Dependent MODE/SYNC Pin Control
      5. 7.3.5  Power-Good Output Operation
      6. 7.3.6  Internal LDO, VCC and VOUT/FB Input
      7. 7.3.7  Bootstrap Voltage and VBOOT-UVLO (BOOT Terminal)
      8. 7.3.8  Spread Spectrum
      9. 7.3.9  Soft Start and Recovery from Dropout
        1. 7.3.9.1 Recovery from Dropout
      10. 7.3.10 Overcurrent Protection (Hiccup Mode)
      11. 7.3.11 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Standby Mode
      3. 7.4.3 Active Mode
        1. 7.4.3.1 CCM Mode
        2. 7.4.3.2 Auto Mode – Light-Load Operation
          1. 7.4.3.2.1 Diode Emulation
          2. 7.4.3.2.2 Frequency Reduction
        3. 7.4.3.3 FPWM Mode – Light-Load Operation
        4. 7.4.3.4 Minimum On-Time (High Input Voltage) Operation
        5. 7.4.3.5 Dropout
  9. 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 Setting the Output Voltage
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 VCC
        6. 8.2.2.6 CFF Selection
        7. 8.2.2.7 Power-Good Signal
        8. 8.2.2.8 Maximum Ambient Temperature
        9. 8.2.2.9 Other Connections
      3. 8.2.3 Application Curves
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
        1. 8.5.1.1 Ground and Thermal Considerations
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
      3. 9.1.3 Device Nomenclature
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.2.1 Adjustable Output Voltage Variants

The TPSM336xx-Q1 determines whether fixed output voltage or adjustable output voltage is required by sensing the resistance of the feedback path during start-up. If other output voltages are desired besides the fixed 3.3V or 5V option, set the TPSM336xx-Q1 output voltage through two external resistors, RFBT and RFBB. Connect RFBT between VOUT at the regulation point and the FB pin. Connect RFBB between the FB pin and AGND.

The TPSM336xx-Q1 has an adjustable output voltage range from 1V to 7V. To verify that the power module regulates to the desired output voltage, the typical minimum value for the parallel combination of RFBT and RFBB is 5kΩ while the typical maximum value is 10kΩ as shown in Equation 3. Use Equation 2 and Equation 3 as a starting point to determine the value of RFBT. Reference Table 7-1 for a list of acceptable resistor values for various output voltages.

Equation 1. 5 k Ω < R F B T | | R F B B ≤ 10 k Ω
Equation 2. R F B T k Ω = R F B B k Ω × V O U T V 1 V - 1
Equation 3. R F B T k Ω ≤ 10 k Ω × V O U T V 1 V

For adjustable output options, use an additional feedforward capacitor, CFF, in parallel with the RFBT, to optimize the transient response. See CFF Selection for additional information. No additional resistor divider or feedforward capacitor, CFF, is needed in case of fixed-output variants.

TPSM33606-Q1 TPSM33610-Q1 TPSM33620-Q1 Setting Output Voltage for Adjustable Output Variant Figure 7-2 Setting Output Voltage for Adjustable Output Variant
Table 7-1 Recommended Feedback Resistor Values for Various Output Voltages
VOUT (V) RFBT (kΩ)(1) RFBB (kΩ)
3.3 33.2 14.3
5.0 49.9 12.4
7 69.8 11.5
(1) RFBT and RFBB based on 1% standard resistor values.