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

7.5 Electrical Characteristics

(Test conditions unless otherwise noted) –40°C ≤ TJ ≤ 125°C, VIN = 5 V, OUT = Open, VEN/UVLO = 2 V, OVCSEL = Open, RILM = 750 Ω , dVdT = Open, ITIMER = Open, PGTH = Open, PG = Open. All voltages referenced to GND.
Test Parameter Description MIN TYP MAX UNITS
INPUT SUPPLY (IN)
VUVP(R) IN Supply UVP Rising Threshold 2.44 2.53 2.64 V
VUVP(F) IN Supply UVP Falling Threshold 2.35 2.42 2.55 V
IQ(ON) IN Supply Quiescent Current  411 593 µA
IQ(ON) IN Supply Current during OVC 426 620 µA
IQ(ON) IN Supply Quiescent Current during RCB, VOUT = VIN + 1 V 186 µA
IQ(OFF) IN Supply OFF State Current (VSD(F) < VEN < VUVLO(F)) 67 130 µA
ISD IN Supply Shutdown Current (VEN < VSD(F)) 1.62 28.7 µA
IINLKG(IRPP) IN Supply Leakage Current (VIN = –14 V, VOUT = 0 V) –3.7 µA
ON RESISTANCE (IN - OUT)
RON VIN = 5 V, IOUT = 3 A, TJ = 25℃ 31 mΩ
2.7 ≤ VIN ≤ 5.7 V, –40℃ ≤ TJ ≤ 125℃ 50.2 mΩ
ENABLE/UNDERVOLTAGE LOCKOUT (EN/UVLO)
VUVLO(R) EN/UVLO Rising Threshold 1.183 1.2 1.223 V
VUVLO(F) EN/UVLO Falling Threshold 1.076 1.1 1.116 V
VSD(F) EN/UVLO Falling Threshold for lowest shutdown current 0.45 0.73 V
IENLKG EN/UVLO Leakage Current –0.1 0.1 µA
OUTPUT VOLTAGE CLAMP (OUT)
VOVC Overvoltage Clamp Threshold, OVCSEL = Shorted to GND 3.65 3.88 4.1 V
Overvoltage Clamp Threshold, OVCSEL = Open 5.25 5.74 6.2 V
VCLAMP Output Voltage During Clamping, OVCSEL = Shorted to GND, IOUT = 10 mA 3.2 3.82 4.2 V
Output Voltage During Clamping, OVCSEL = Open, IOUT = 10 mA 5 5.58 6.1 V
OVERCURRENT PROTECTION (OUT)
ILIM Current Limit Threshold, RILM = 6.65 kΩ 0.425 0.5 0.575 A
Current Limit Threshold, RILM = 3.32 kΩ 0.85 1.0 1.15 A
Current Limit Threshold, RILM = 1.65 kΩ 1.8 2.02 2.2 A
Current Limit Threshold, RILM = 750 Ω 3.96 4.44 4.84 A
IFLT Circuit Breaker Threshold, ILM Pin Open (Single point failure) 0.1 A
Circuit Breaker Threshold, ILM Pin Short to GND (Single point failure) 1.1 2.1 A
ISCGain Scalable Fast Trip Threshold (ISC) : ILIM Ratio 201 %
IFT Fixed Fast-trip Current Threshold 22 A
VFB VOUT threshold to exit Current Limit Foldback 1.9 V
VINT ITIMER pin internal pull-up voltage 2.3 2.52 2.72 V
OVERCURRENT FAULT TIMER (ITIMER)
IITIMER ITIMER pin internal discharge current, IOUT > ILIM 1.2 1.81 2.5 µA
RITIMER ITIMER pin internal pull-up resistance 15 kΩ
ΔVITIMER ITIMER discharge voltage 1.28 1.51 1.74 V
OUTPUT LOAD CURRENT MONITOR (ILM)
GIMON Analog Load Current Monitor Gain (IMON : IOUT), IOUT = 0.5 A to 1 A, IOUT < ILIM 165 182 200 µA/A
Analog Load Current Monitor Gain (IMON : IOUT), IOUT = 1 A to 4 A, IOUT < ILIM 165 182 200 µA/A
REVERSE CURRENT BLOCKING (IN - OUT)
VFWD VIN – VOUT Forward regulation voltage, IOUT = 10 mA 5 17.4 mV
VREVTH VIN – VOUT threshold for fast BFET turn off (enter reverse current blocking) –36.5 –29.1 –22.3 mV
VFWDTH VIN – VOUT threshold for fast BFET turn on (exit reverse current blocking) 83 102.2 125 mV
IOUTLKG(RCB) OUT Leakage Current during ON state with RCB, VOUT = VIN + 1 V 270 µA
IREVLKG(OFF) Reverse Leakage Current during unpowered condition, VOUT  = 12 V, VIN = 0 V 4.8 µA
POWER GOOD INDICATION (PG)
VPGD PG pin voltage while de-asserted, VIN < VUVP(F), VEN < VSD(F), Weak pull-up (IPG = 26 µA) 0.67 1 V
PG pin voltage while de-asserted, VIN < VUVP(F), VEN < VSD(F), Strong pull-up (IPG = 242 µA) 0.78 1 V
PG pin voltage while de-asserted, VIN > VUVP(R) 0 V
IPGLKG PG Pin Leakage Current, PG asserted 0.9 3 µA
POWERGOOD THRESHOLD (PGTH)
VPGTH(R) PGTH Rising Threshold 1.183 1.2 1.223 V
VPGTH(F) PGTH Falling Threshold 1.076 1.09 1.116 V
IPGTHLKG PGTH Leakage Current –0.1 0.3 µA
OVERTEMPERATURE PROTECTION (OTP)
TSD Thermal Shutdown Rising Threshold, TJ↑ 154 °C
TSDHYS Thermal Shutdown Hysteresis, TJ↓ 10 °C
DVDT
IdVdt dVdt Pin Charging Current 0.78 1.97 3.3 µA