SLVSDQ8B October   2016  – June 2021 TPS54388C-Q1

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Fixed-Frequency PWM Control
      2. 7.3.2 Slope Compensation and Output Current
      3. 7.3.3 Bootstrap Voltage (BOOT) and Low-Dropout Operation
      4. 7.3.4 Error Amplifier
      5. 7.3.5 Voltage Reference
    4. 7.4 Device Functional Modes
      1. 7.4.1  Adjusting the Output Voltage
      2. 7.4.2  Enable Functionality and Adjusting Undervoltage Lockout
      3. 7.4.3  Slow-Start or Tracking Pin
      4. 7.4.4  Sequencing
      5. 7.4.5  Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      6. 7.4.6  Overcurrent Protection
      7. 7.4.7  Frequency Shift
      8. 7.4.8  Reverse Overcurrent Protection
      9. 7.4.9  Synchronize Using the RT/CLK Pin
      10. 7.4.10 Power Good (PWRGD Pin)
      11. 7.4.11 Overvoltage Transient Protection
      12. 7.4.12 Thermal Shutdown
      13. 7.4.13 Small-Signal Model for Loop Response
      14. 7.4.14 Simple Small-Signal Model for Peak-Current-Mode Control
      15. 7.4.15 Small-Signal Model for Frequency Compensation
  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 Selecting the Switching Frequency
        2. 8.2.2.2 Output Inductor Selection
        3. 8.2.2.3 Output Capacitor
        4. 8.2.2.4 Input Capacitor
        5. 8.2.2.5 Slow-Start Capacitor
        6. 8.2.2.6 Bootstrap Capacitor Selection
        7. 8.2.2.7 Output-Voltage and Feedback-Resistor Selection
        8. 8.2.2.8 Compensation
        9. 8.2.2.9 Power-Dissipation Estimate
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Typical Characteristics

GUID-56F3C843-2551-4BC1-829C-92C41DD08AEF-low.gifFigure 6-1 High-Side and Low-Side rDS(on) vs Temperature
GUID-35700AF4-7737-455A-8DAB-BB3A3955D354-low.gifFigure 6-3 High-Side Current Limit vs Temperature
GUID-12492892-06C7-4C4C-A7A1-83316671BD00-low.gifFigure 6-5 Switching Frequency vs RT Resistance, Low-Frequency Range
GUID-EE88E9C5-8DCB-4054-96F1-8F1631494601-low.gif
V(VIN) = 3.3 V
Figure 6-7 Transconductance vs Temperature
GUID-D1976BA5-E263-46E5-B8DB-548C6C8C46A3-low.gifFigure 6-9 EN Pin Voltage vs Temperature
GUID-0F9C148D-5807-453E-8CC5-88B3F35CC6F1-low.gif
V(VIN) = 5 VV(EN) = Threshold – 50 mV
Figure 6-11 EN Pin Current vs Temperature
GUID-FE436280-57A0-4DE3-88E2-898747DF4A12-low.gifFigure 6-13 Input Voltage vs Temperature
GUID-63562E46-4AF0-444A-95F3-6C653DCB16B8-low.gif
TJ = 25°C
Figure 6-15 Shutdown Supply Current vs Input Voltage
GUID-9ECB1EC2-2EAF-46AF-95DE-04B01AA5B4BF-low.gif
TJ = 25°C
Figure 6-17 VIN Supply Current vs Input Voltage
GUID-CD6A723D-8A46-448C-B077-6AAFD36A50FF-low.gif
V(VIN) = 5 V
Figure 6-19 PWRGD On-Resistance vs Temperature
GUID-94CC6D07-532E-454A-A018-E378A460420B-low.gif
Rt = 400 kΩV(VIN) = 5 V
Figure 6-2 Frequency vs Temperature
GUID-23E50B5E-8048-423D-8CF9-15F3BA6B3473-low.gif
V(VIN) = 3.3 V
Figure 6-4 Voltage Reference vs Temperature
GUID-B9EE5862-A16D-4490-A448-C38C001532BC-low.gifFigure 6-6 Switching Frequency vs V(VSENSE)
GUID-B15B42C0-CD63-4F86-879D-D2E0C928DDB2-low.gif
V(VIN) = 3.3 V
Figure 6-8 Transconductance (Slow Start) vs Junction Temperature
GUID-13E943FA-8692-47E1-8F43-2CBE9AEFF9AB-low.gif
V(VIN) = 5 VV(EN) = Threshold + 50 mV
Figure 6-10 EN Pin Current vs Temperature
GUID-50518E49-9DFF-41D9-9F1E-029ED561E1BA-low.gif
V(VIN) = 5 V
Figure 6-12 Charge Current vs Temperature
GUID-675A1E2D-EE08-4329-B66F-AFD0329CCC75-low.gif
V(VIN) = 3.3 V
Figure 6-14 Shutdown Supply Current vs Temperature
GUID-9ECB1EC2-2EAF-46AF-95DE-04B01AA5B4BF-low.gif
V(VIN) = 3.3 V
Figure 6-16 VIN Supply Current vs Junction Temperature
GUID-ED98D8A5-1224-492E-B9B9-ECE498640DE9-low.gif
V(VIN) = 5 V
Figure 6-18 PWRGD Threshold vs Temperature
GUID-47422520-184B-4028-A1BB-BC2E941BF190-low.gif
V(VIN) = 5 VV(SS/TR) = 0.4 V
Figure 6-20 SS/TR-to-VSENSE Offset vs Temperature