SBVS425B December   2022  – June 2025 TPS748A-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: IOUT = 50mA
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Enable and Shutdown
      2. 6.3.2 Active Discharge
      3. 6.3.3 Power-Good Output (PG)
      4. 6.3.4 Internal Current Limit
      5. 6.3.5 Thermal Shutdown Protection (TSD)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
      3. 6.4.3 Disabled
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Input, Output, and Bias Capacitor Requirements
      2. 7.1.2 Dropout Voltage
      3. 7.1.3 Output Noise
      4. 7.1.4 Estimating Junction Temperature
      5. 7.1.5 Soft Start, Sequencing, and Inrush Current
      6. 7.1.6 Power-Good Operation
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.6 Typical Characteristics: IOUT = 50mA

at TJ = 25°C, VIN = VOUT(nom) + 0.3V, VBIAS = 5V, IOUT = 50mA, VEN = VIN, CIN = 1μF, CBIAS = 4.7μF, and COUT = 10μF (unless otherwise noted)

TPS748A-Q1 IN PSRR vs Frequency and VIN
VOUT = 0.8V, IOUT = 1.5A, CBIAS = 0.1μF, COUT = 10μF,
CSS = 10nF, VEN = VBIAS = 6V
Figure 5-1 IN PSRR vs Frequency and VIN
TPS748A-Q1 IN PSRR vs Frequency and IOUT for VOUT = 0.8V
VIN = 1.1V, VOUT = 0.8V, CBIAS = 0.1μF, COUT = 10μF,
CSS = 10nF, VEN = VBIAS = 6V
Figure 5-3 IN PSRR vs Frequency and IOUT for VOUT = 0.8V
TPS748A-Q1 IN PSRR vs Frequency and IOUT for VOUT = 3.3V
VIN = 3.6V, VOUT = 3.3V, CBIAS = 0.1μF, COUT = 10μF,
CSS = 10nF, VEN = VBIAS = 6V
Figure 5-5 IN PSRR vs Frequency and IOUT for VOUT = 3.3V
TPS748A-Q1 BIAS PSRR vs Frequency and VBIAS
VIN = 1.1V, VOUT = 0.8V, IOUT = 1.5A, CIN = 10μF,
COUT = 10μF, CSS = 10nF, VEN = 6V
Figure 5-7 BIAS PSRR vs Frequency and VBIAS
TPS748A-Q1 Output Voltage Noise Density vs Frequency and VBIAS
VEN = VBIAS, VIN = 1.1V, VOUT = 0.8V, IOUT = 1.5A,
CIN = 10μF, COUT = 10μF, CSS = 10nF, CBIAS = 0.1μF
Figure 5-9 Output Voltage Noise Density vs Frequency and VBIAS
TPS748A-Q1 IN-to-OUT Dropout Voltage vs IOUT and Temperature (TJ)
VBIAS = 5V, VOUT = 0.8V
Figure 5-11 IN-to-OUT Dropout Voltage vs IOUT and Temperature (TJ)
TPS748A-Q1 Load Regulation vs 0mA to 50mA Output Current
VIN = 1.1V, VBIAS = 5V, VOUT = 0.8V
Figure 5-13 Load Regulation vs 0mA to 50mA Output Current
TPS748A-Q1 Line Regulation vs Input Voltage
VOUT = 0.8V, VBIAS = 5V, IOUT = 50mA
Figure 5-15 Line Regulation vs Input Voltage
TPS748A-Q1 IN Pin Quiescent Current vs Input Voltage
VOUT = 0.8V, VBIAS = 5.0V, IOUT = 50mA
Figure 5-17 IN Pin Quiescent Current vs Input Voltage
TPS748A-Q1 BIAS Pin Quiescent Current vs Input Voltage
VOUT = 0.8V, VBIAS = 5.0V, IOUT = 1.5A
Figure 5-19 BIAS Pin Quiescent Current vs Input Voltage
TPS748A-Q1 Shutdown Current (GND Pin) vs Input Voltage
VBIAS = 5V, VEN = 0V
Figure 5-21 Shutdown Current (GND Pin) vs Input Voltage
TPS748A-Q1 Current Limit vs Output Voltage
 
Figure 5-23 Current Limit vs Output Voltage
TPS748A-Q1 IN PSRR vs Frequency and CSS
VIN = 1.1V, VOUT = 0.8V, IOUT = 1.5A, CBIAS = 0.1μF,
COUT = 10μF, VEN = VBIAS = 6V
Figure 5-2 IN PSRR vs Frequency and CSS
TPS748A-Q1 PSRR vs Frequency and IOUT for VOUT = 1.8V
VIN = 2.1V, VOUT = 1.8V, CBIAS = 0.1μF, COUT = 10μF,
CSS = 10nF, VEN = VBIAS = 6V
Figure 5-4 PSRR vs Frequency and IOUT for VOUT = 1.8V
TPS748A-Q1 IN PSRR vs Frequency and COUT
VIN = 1.1V, VOUT = 0.8V, IOUT = 1.5A, CBIAS = 0.1μF,
CSS = 10nF, VEN = VBIAS = 6V
Figure 5-6 IN PSRR vs Frequency and COUT
TPS748A-Q1 BIAS PSRR vs Frequency and IOUT
VEN = VIN = 1.1V, VOUT = 0.8V, IOUT = 1.5A, CIN = 10μF, COUT = 10μF, CSS = 10nF, VBIAS = 6V
Figure 5-8 BIAS PSRR vs Frequency and IOUT
TPS748A-Q1 Output Voltage Noise Density vs Frequency and IOUT
VEN = VBIAS, VIN = 1.1V, VOUT = 0.8V, CIN = 10μF,
COUT = 10μF, CSS = 10nF, CBIAS = 0.1μF
Figure 5-10 Output Voltage Noise Density vs Frequency and IOUT
TPS748A-Q1 BIAS-to-OUT Dropout Voltage vs IOUT and Temperature (TJ)
VIN = 1.1V, VOUT = 0.8V
Figure 5-12 BIAS-to-OUT Dropout Voltage vs IOUT and Temperature (TJ)
TPS748A-Q1 Load Regulation vs ≥50mA Output Current
VIN = 1.1V, VBIAS = 5V, VOUT = 0.8V
Figure 5-14 Load Regulation vs ≥50mA Output Current
TPS748A-Q1 Output Voltage vs Bias Voltage
VBIAS = 5V, VOUT = 0.8V, IOUT = 50mA
Figure 5-16 Output Voltage vs Bias Voltage
TPS748A-Q1 IN Pin Quiescent Current vs Output Current
VOUT = 0.8V, VBIAS = 5.0V
Figure 5-18 IN Pin Quiescent Current vs Output Current
TPS748A-Q1 BIAS Pin Quiescent Current vs Output Current
VIN = 1.1V, VOUT = 0.8V, VBIAS = 5.0V
Figure 5-20 BIAS Pin Quiescent Current vs Output Current
TPS748A-Q1 Shutdown Current (GND Pin) vs Bias Voltage
VIN = 1.1V, VEN = 0V
Figure 5-22 Shutdown Current (GND Pin) vs Bias Voltage