SLVSDV8 July   2017 TPS54424

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
    1.     Simplified Schematic
  3. 3 Description
    1.     Efficiency
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Switching Characteristics
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  7. 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  Continuous Conduction Mode Operation (CCM)
      3. 7.3.3  VIN Pins and VIN UVLO
      4. 7.3.4  Voltage Reference and Adjusting the Output Voltage
      5. 7.3.5  Error Amplifier
      6. 7.3.6  Enable and Adjustable UVLO
      7. 7.3.7  Soft Start and Tracking
      8. 7.3.8  Safe Start-up into Pre-Biased Outputs
      9. 7.3.9  Power Good
      10. 7.3.10 Sequencing (SS/TRK)
      11. 7.3.11 Adjustable Switching Frequency (RT Mode)
      12. 7.3.12 Synchronization (CLK Mode)
      13. 7.3.13 Bootstrap Voltage and 100% Duty Cycle Operation (BOOT)
      14. 7.3.14 Output Overvoltage Protection (OVP)
      15. 7.3.15 Overcurrent Protection
        1. 7.3.15.1 High-side MOSFET Overcurrent Protection
        2. 7.3.15.2 Low-side MOSFET Overcurrent Protection
    4. 7.4 Device Functional Modes
  8. 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  Switching Frequency
        3. 8.2.2.3  Output Inductor Selection
        4. 8.2.2.4  Output Capacitor
        5. 8.2.2.5  Input Capacitor
        6. 8.2.2.6  Output Voltage Resistors Selection
        7. 8.2.2.7  Soft-start Capacitor Selection
        8. 8.2.2.8  Undervoltage Lockout Set Point
        9. 8.2.2.9  Bootstrap Capacitor Selection
        10. 8.2.2.10 PGOOD Pull-up Resistor
        11. 8.2.2.11 Compensation
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Alternate Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Document Support
      1. 11.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RNV|18
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.3 Application Curves

TPS54424 D001_EfficiencyLinear.gif
TA = 25°C VOUT = 1.8 V fSW = 700 kHz
Figure 36. Efficiency
TPS54424 D004_LoadRegulation.gif
TA = 25°C VOUT = 1.8 V fSW = 700 kHz
Figure 38. Load Regulation
TPS54424 D006_Loop.gif
VIN = 12 V VOUT = 1.8 V IOUT = 2 A
Figure 40. Loop Response
TPS54424 TPS54424EVM-779-SLVUB56_VoutRipple_0A.gif
VIN = 12 V VOUT = 1.8 V IOUT = 0 A
Figure 42. Output Ripple, No Load
TPS54424 TPS54424EVM-779-SLVUB56_VinRipple_0A.gif
VIN = 12 V VOUT = 1.8 V IOUT = 0 A
Figure 44. Input Voltage Ripple, No Load
TPS54424 start_vin_slvuAX8.gif
RLOAD = 1 Ω
Figure 46. VIN Startup
TPS54424 stop_vin_slvuAX8.gif
RLOAD = 1 Ω VIN = 12 V
Figure 48. VIN Shutdown
TPS54424 prebias_start_en_slvuAX8.png
VIN = 12 V
Figure 50. EN Startup with Pre-biased Output
TPS54424 TPS54424EVM-779-SLVUB56_HiccupRestart.gif
VIN = 12 V IOUT = short
Figure 52. Hiccup Mode Current Limit
TPS54424 D002_EfficiencyLog.gif
TA = 25°C VOUT = 1.8 V fSW = 700 kHz
Figure 37. Efficiency (Log Scale)
TPS54424 D005_LineRegulation.gif
TA = 25°C VOUT = 1.8 V fSW = 700 kHz
Figure 39. Line Regulation
TPS54424 TPS54424EVM-779-SLVUB56_LoadTransient.gif
VIN = 12 V VOUT = 1.8 V
Figure 41. Transient Response
TPS54424 TPS54424EVM-779-SLVUB56_VoutRipple_4A.gif
VIN = 12 V VOUT = 1.8 V IOUT = 4 A
Figure 43. Output Ripple, Full Load
TPS54424 TPS54424EVM-779-SLVUB56_VinRipple_4A.gif
VIN = 12 V VOUT = 1.8 V IOUT = 4 A
Figure 45. Input Voltage Ripple, Full Load
TPS54424 start_en_slvuAX8.gif
RLOAD = 1 Ω
Figure 47. EN Startup
TPS54424 stop_en_slvuAX8.gif
RLOAD = 1 Ω
Figure 49. EN Shutdown
TPS54424 TPS54424EVM-779-SLVUB56_EnterHiccup.gif
VIN = 12 V IOUT = short
Figure 51. Output Short Circuit Response
TPS54424 TPS54424EVM-779-SLVUB56_HiccupRecover.gif
VIN = 12 V IOUT = short removed
Figure 53. Hiccup Mode Recovery