SNVSCS6A March   2026  – August 2026 TPS7H1301-SP

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options Table
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Quality Conformance Inspection
    7. 7.7 Typical Characteristics
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Enable
      2. 9.3.2  Charge Pump
        1. 9.3.2.1 Charge Pump Operation
        2. 9.3.2.2 Foldback Switching
      3. 9.3.3  Startup
      4. 9.3.4  Power Good
      5. 9.3.5  Output Voltage
      6. 9.3.6  Dropout
      7. 9.3.7  Output Voltage Accuracy
      8. 9.3.8  Output Noise
      9. 9.3.9  Power Supply Rejection Ratio
      10. 9.3.10 Stability
        1. 9.3.10.1 Stability of the TPS7H1301
        2. 9.3.10.2 Stability of the TPS7H1302
      11. 9.3.11 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Enable Disable
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application TPS7H1301
      1. 10.2.1 Design Requirements TPS7H1301
      2. 10.2.2 Detailed Design Procedure TPS7H1301
        1. 10.2.2.1 Capacitor Selection
          1. 10.2.2.1.1 Input Capacitor (CIN) Selection
          2. 10.2.2.1.2 CFLY TPS7H1301
          3. 10.2.2.1.3 CPOUT Capacitor TPS7H1301
          4. 10.2.2.1.4 Bypass Capacitors
          5. 10.2.2.1.5 Output Capacitor
        2. 10.2.2.2 Charge Pump Output Resistance
        3. 10.2.2.3 Configuring LDO Output
        4. 10.2.2.4 Output Noise
        5. 10.2.2.5 PSRR Design Implications
        6. 10.2.2.6 Stability Design Considerations
      3. 10.2.3 Application Curves
    3. 10.3 Typical Application TPS7H1301 Parallel Operation
      1. 10.3.1 Design Requirements
      2. 10.3.2 Detailed Design Procedure Parallel TPS7H1301
        1. 10.3.2.1 Parallel Ballast Resistor
      3. 10.3.3 Application Performance Plots
    4. 10.4 Typical Application TPS7H1302
      1. 10.4.1 Design Requirements TPS7H1302
      2. 10.4.2 Detailed Design Procedure TPS7H1302
        1. 10.4.2.1 Capacitor Selection TPS7H1302
        2. 10.4.2.2 CFLY Capacitor TPS7H1302
        3. 10.4.2.3 CPOUT Capacitor TPS7H1302
        4. 10.4.2.4 Stability TPS7H1302
      3. 10.4.3 TPS7H1302 Application Performance Plots
    5. 10.5 TPS7H1302 Low Noise Configuration
      1. 10.5.1 Design Requirements TPS7H1302 Low Noise
      2. 10.5.2 Application Performance Plots
    6. 10.6 Power Supply Recommendations
    7. 10.7 Layout
      1. 10.7.1 Layout Guidelines
      2. 10.7.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
    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
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information
    1.     PACKAGE OPTION ADDENDUM
    2. 13.1 Tube Information
    3.     88

9.3.6 Dropout

For a standard output voltage of –1.8V, input voltage exceeding 5V, and load currents below 200mA both the TPS7H1301 and TPS7H1302 do not enter dropout conditions due to the minimum input voltage (VIN) and drop voltage (VDroop) providing sufficient headroom.

The TPS7H1301 and TPS7H1302 integration of a charge pump and LDO, presents unique considerations in regard to LDO dropout. Firstly, when VOUT is sufficiently lower than the magnitude of VIN the output of the charge pump is sufficiently large enough to provide enough input voltage headroom across load current. Typically, an input voltage of 5V with an output voltage of –1.8V or higher satisfies this no dropout condition.

Secondly, when the magnitudes of VIN and VOUT are relatively close, the load current is the determining factor as to when the LDO enters dropout.

Dropout current, IDO, for the TPS7H1301 is defined as the load current when the output voltage rises to 98% of the initial value at the configured output voltage. For the TPS7H1302, the dropout current output voltage criteria needs to accommodate load regulation; therefore, for load currents below 200mA, the percentage of VOUT that is permitted to rise above (VLIM) is 98%. When the applied load current on the TPS7H1302 is 400mA, VLIM is adjusted to 97% of VOUT; which is necessary to accommodate the TPS7H1302's load current. See Dropout Current Measurement for the test waveforms used to measure dropout.

During dropout conditions, the pass transistor operates in the ohmic (triode) region and functions as a resistive switch. The dropout voltage specification defines the minimum input voltage margin above the nominal programmed output voltage required to maintain output regulation. When the input voltage falls below this minimum threshold (VIN < VOUT + VDO), the output voltage concurrently decreases proportionally, falling out of regulation.