SLVSCP3D January   2015  – November 2025 TPS7B4253-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Short Circuit and Overcurrent Protection
      2. 6.3.2 Integrated Inductive Clamp Protection
      3. 6.3.3 OUT Short to Battery and Reverse Polarity Protection
      4. 6.3.4 Undervoltage Shutdown
      5. 6.3.5 Thermal Protection
      6. 6.3.6 Regulated Output (OUT)
      7. 6.3.7 Enable (EN)
      8. 6.3.8 Adjustable Output Voltage (FB and ADJ)
        1. 6.3.8.1 OUT Voltage Equal to the Reference Voltage
        2. 6.3.8.2 OUT Voltage Higher Than Reference Voltage
        3. 6.3.8.3 Output Voltage Lower Than Reference Voltage
    4. 6.4 Device Functional Modes
      1. 6.4.1 Operation With VIN < 4V
      2. 6.4.2 Operation With EN Control
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Application With Output Voltage Equal to the Reference Voltage
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Input Capacitor
          2. 7.2.1.2.2 Output Capacitor
        3. 7.2.1.3 Application Curve
      2. 7.2.2 High-Side Switch Configuration
      3. 7.2.3 High Accuracy LDO
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Power Dissipation and Thermal Considerations
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
      2. 8.1.2 Development Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Mechanical Data
7.2.1.2.2 Output Capacitor

For stable operation, the TPS7B4253-Q1 device requires an output capacitor with a value in the range from 10µF to 500µF and with an ESR range from 0.001Ω to 20Ω when the FB pin is directly connected to the OUT pin. TI recommends selecting a ceramic capacitor with low ESR to improve the load transient response.

To achieve an output voltage higher than the reference voltage, a resistor divider is connected between the OUT pin and the FB pin. In this case, a 47nF feed-forward capacitor must be connected between the OUT and FB pins for loop stability. The ESR of the output capacitor must be from 0.001Ω to 10Ω.

When multiple capacitors (two or more) are connected in parallel at the OUT pin, the ESR range of each output capacitor must be from 0.001Ω to 3Ω for loop stability.

In case the FB pin is shorted to ground, the TPS7B4253-Q1 device functions as a power switch with no need for the output capacitor.