SLVSFX8A March   2021  – March 2022 TPS2521

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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 Timing Requirements
    7. 7.7 Switching Characteristics
      1.      15
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Reverse Polarity Protection
      2. 8.3.2 Undervoltage Lockout (UVLO and UVP)
      3. 8.3.3 Overvoltage Clamp (OVC)
      4. 8.3.4 Inrush Current, Overcurrent, and Short Circuit Protection
        1. 8.3.4.1 Slew Rate (dVdt) and Inrush Current Control
        2. 8.3.4.2 Active Current Limiting
        3. 8.3.4.3 Short-Circuit Protection
      5. 8.3.5 Analog Load Current Monitor
      6. 8.3.6 Reverse Current Protection
      7. 8.3.7 Overtemperature Protection (OTP)
      8. 8.3.8 Fault Response
      9. 8.3.9 Power Good Indication (PG)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Single Device, Self-Controlled
    3. 9.3 Typical Application
      1. 9.3.1 Application
      2. 9.3.2 Design Requirements
      3. 9.3.3 Detailed Design Procedure
        1. 9.3.3.1 Device Selection
        2. 9.3.3.2 Setting Undervoltage and Overvoltage Thresholds
        3. 9.3.3.3 Setting Output Voltage Rise Time (tR)
        4. 9.3.3.4 Setting Power Good Assertion Threshold
        5. 9.3.3.5 Setting Overcurrent Threshold (ILIM)
        6. 9.3.3.6 Setting Overcurrent Blanking Interval (tITIMER)
      4. 9.3.4 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Transient Protection
    2. 10.2 Output Short-Circuit Measurements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

7.8 Typical Characteristics

Figure 7-2 ON-Resistance vs Supply Voltage
Figure 7-4 IN Quiescent Current vs Temperature
Figure 7-6 IN Shutdown Current vs Supply Voltage
Figure 7-8 EN/UVLO Rising Threshold vs Temperature
Figure 7-10 EN/UVLO Shutdown Falling Threshold vs Temperature
Figure 7-12 Overcurrent Protection Threshold Accuracy (Across Process, Voltage, and Temperature)
Figure 7-14 Scalable Fast-Trip Threshold:Current Limit Threshold (ILIM) Ratio vs Temperature
Figure 7-16 RCB - Forward Regulation Voltage vs Temperature
Figure 7-18 RCB - Forward Comparator Threshold vs Temperature
Figure 7-20 OVC Threshold vs Temperature
Figure 7-22 OVC Clamping Voltage (OVCSEL = Open) vs Load Current
Figure 7-24 ITIMER Discharge Current vs Temperature
Figure 7-26 ITIMER Internal Pullup Voltage vs Temperature
GUID-20201207-CA0I-HXTC-XBPK-CCZ8LWR7BDZS-low.gifFigure 7-28 PGTH Threshold vs Temperature
Figure 7-30 Time to Thermal Shut-Down During Inrush State
GUID-20210325-CA0I-8FXV-SQMH-SPDBJTGWBKH5-low.gif
VIN = 5 V, COUT = 220 μF, CdVdt = Open, VEN/UVLO stepped up to 1.4 V
Figure 7-32 Start-Up with Enable
GUID-20210325-CA0I-00NP-GD8D-WF5T47DNWH74-low.gif
VIN = 5 V, COUT = 690 μF, CdVdt = 3300 pF, VEN/UVLO stepped up to 1.4 V
Figure 7-34 Inrush Current with Capacitive Load
GUID-20210325-CA0I-FC6D-BL8Z-CFBDZXWZVDSS-low.gif
COUT = 220 μF, PG pulled up to 3 V, –15 V hot-plugged to IN
Figure 7-36 Input Reverse Polarity Protection - Fast Ramp
GUID-20210325-CA0I-8H6T-V83V-TZ8G7X0K1SL4-low.gif
ROVCSEL = GND, COUT = 220 μF, IOUT = 120 mA, VIN ramped up from 3.3 V to 6 V
Figure 7-38 Overvoltage Clamp Response
GUID-20210325-CA0I-SPDZ-BLS7-MLVNTNWZST2X-low.gif
VIN = 5 V, CITIMER = 2.2 nF, COUT = 220 μF, RILM = 750 Ω, IOUT stepped from 2 A → 6 A → 2 A within 1 ms
Figure 7-40 Transient Overcurrent Blanking Timer Response
GUID-20210327-CA0I-CTB6-SMFW-FB5K1DGX7R57-low.gif
VIN = 5 V, RILM = 750 Ω, VEN/UVLO = 1.4 V, OUT stepped from Open → Short-circuit to GND
Figure 7-42 Output Short-Circuit During Steady State
GUID-20210327-CA0I-NZGH-LKCG-Z6RCHRVKWK4N-low.gif
VIN = 5 V, COUT = Open, OUT short-circuit to GND, RILM = 750 Ω, VEN/UVLO stepped from 0 V to 1.4 V
Figure 7-44 Power Up into Short-Circuit
Figure 7-3 Forward Voltage Drop vs Load Current
Figure 7-5 IN OFF State (UVLO) Current vs Temperature
Figure 7-7 IN Undervoltage Threshold vs Temperature
Figure 7-9 EN/UVLO Falling Threshold vs Temperature
Figure 7-11 Overcurrent Protection Threshold vs ILM Resistor
Figure 7-13 Analog Current Monitor Gain Accuracy
Figure 7-15 Steady State Fixed Fast-Trip Current Threshold vs Temperature
Figure 7-17 RCB - Reverse Comparator Threshold vs Temperature
Figure 7-19 Reverse Leakage Current During OFF State
Figure 7-21 OVC Clamping Voltage (OVCSEL = GND) vs Load Current
Figure 7-23 ITIMER Discharge Differential Voltage Threshold vs Temperature
Figure 7-25 ITIMER Internal Pullup Resistance vs Temperature
Figure 7-27 DVDT Charging Current vs Temperature
Figure 7-29 PG Low Voltage Without Input Supply vs Temperature
Figure 7-31 Time to Thermal Shut-Down During Steady State
GUID-20210325-CA0I-XFXK-GPRS-7FFGXLB7S3PF-low.gif
VEN/UVLO = 1.5 V, COUT = 220 μF, CdVdt = Open, VIN ramped up to 5 V
Figure 7-33 Start-Up with Supply
GUID-20210325-CA0I-BZQZ-XHV7-RFRMBXJ83PBD-low.gif
VIN = 5 V, COUT = 690 μF, ROUT = 4 Ω, CdVdt = 3300 pF, VEN/UVLO stepped up to 1.4 V
Figure 7-35 Inrush Current with Resistive and Capacitive Load
GUID-20210325-CA0I-8MRF-SXXL-ZDSK2HDZGH1V-low.gif
COUT = 220 μF, PG pulled up to 3 V, VIN ramped down from 0 V to –15 V and then ramped up to 0 V
Figure 7-37 Input Reverse Polarity Protection - Slow Ramp
GUID-20210325-CA0I-KKRS-ZWKS-JHX8QRVBKMXC-low.gif
ROVCSEL = Open, COUT = 220 μF, IOUT = 150 mA, VIN ramped up from 5 V to 8 V
Figure 7-39 Overvoltage Clamp Response
GUID-20210327-CA0I-9JDP-BB8J-CWXDFFKLWWGG-low.gif
VIN = 5 V, CITIMER = 2.2 nF, COUT = 220 μF, RILM = 750 Ω, IOUT stepped from 0 A → 6.7 A
Figure 7-41 Active Current Limit Response
GUID-20210327-CA0I-0ZTR-XVQ6-DFZSMTC6HMTP-low.gif
VIN = 5 V, RILM = 750 Ω, VEN/UVLO = 1.4 V, OUT stepped from Open → Short-circuit to GND
Figure 7-43 Output Short-Circuit During Steady State (Zoomed In)