SLUS907K January   2009  – June 2019 TPS2421-1 , TPS2421-2

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 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 CT
      2. 8.3.2 FLT
      3. 8.3.3 GND
      4. 8.3.4 ISET
      5. 8.3.5 VIN
      6. 8.3.6 VOUT
      7. 8.3.7 PG
    4. 8.4 Device Functional Modes
      1. 8.4.1 Startup
      2. 8.4.2 Maximum Allowable Load to Ensure Successful Startup
        1. 8.4.2.1 Enable Pin Considerations
        2. 8.4.2.2 Fault Timer
        3. 8.4.2.3 Normal Operation
        4. 8.4.2.4 Startup into a Short
      3. 8.4.3 Shutdown Modes
        1. 8.4.3.1 Hard Overload - Fast Trip
        2. 8.4.3.2 Overcurrent Shutdown
    5. 8.5 Programming
      1. 8.5.1 Fault (ISET) and Current-Limit (ILIM) Thresholds
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Transient Protection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 PowerPad™
  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 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resource
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.5 Electrical Characteristics

Unless otherwise noted: 3 V ≤ VVIN ≤ 18 V, EN = 0 V, PG = FLT = open, ROUT = open, RRSET = 49.9 kΩ, –40°C ≤ TJ ≤ +125°C, No external capacitor connected to VOUT
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN
UVLO VIN rising 2.6 2.85 2.9 V
Hysteresis 150 mV
Bias current EN = 2.4 V 25 100 μA
EN = 0 V 3.9 5 mA
VIN, VOUT
RON RVIN-VOUT, IVOUT < ILIM, 1 A ≤ IVOUT ≤ 4.5 A 33 50 mΩ
Power limit TPS242x VVIN: 12 V, CVOUT = 1000 μF, EN: 3 V → 0 V 3 5 7.5 W
Reverse diode voltage VVOUT > VVIN , EN = 5 V, IVIN = –1 A 0.77 1 V
ISET
ISET Fault current threshold IVOUT ↑, ICT: sinking → sourcing, pulsed test A
0°C ≤ TJ ≤ +85°C RRSET = 200 kΩ 0.8 1.2
RRSET = 100 kΩ 1.8 2.2
RRSET = 49.9 kΩ 3.6 4.4
–40°C ≤ TJ ≤ +125°C RRSET = 200 kΩ 0.75 1.25
RRSET = 100 kΩ 1.75 2.25
RRSET = 49.9 kΩ 3.6 4.4
ILIM / ISET Ratio ILIM / ISET RRSET = 200 kΩ 1.1 1.8 2.6 A
RRSET = 100 kΩ 1.1 1.5 2.1
RRSET = 49.9 kΩ 1.1 1.4 1.6
ILIM Current limit IVOUT rising, VVIN–VOUT = 0.3 V, pulsed test RRSET = 200 kΩ 1.1 1.8 2.4 A
RRSET = 100 kΩ 2.3 3 3.7 A
RRSET = 49.9 kΩ 4.6 5.5 6.3 A
CT
Charge-discharge current ICT sourcing, VCT = 1 V, In current limit 29 35 41 μA
ICT sinking (–2), VCT = 1 V, drive CT to 1 V, measure current 1 1.4 1.8
Threshold voltage VCT rising 1.3 1.4 1.5 V
VCT falling, drive CT to 1 V, measure current 0.1 0.16 0.3
ON/OFF fault duty cycle VVOUT = 0 V 2.8% 3.7% 4.6%
EN
Threshold voltage VEN falling 0.8 1 1.5 V
Hysteresis 20 150 250 mV
Input bias current VEN = 2.4 V –2 0 0.5 μA
VEN = 0.2 V –3 1 0.5
Turnon propagation delay VVIN = 3.3 V, ILOAD = 1 A, VEN : 2.4 V → 0.2 V,
VVOUT: rising 90% × VVIN 		350 500 μs
Turnoff propagation delay VVIN = 3.3 V, ILOAD = 1 A, VEN : 0.2 V → 2.4 V,
VVOUT: ↓ 10% × VVIN 		30 50
FLT
VOL Low level output voltage VCT = 1.8 V, IFLT = 1 mA 0.2 0.4 V
Leakage current VFLT = 18 V 1 μA
PG
PG threshold V(VIN–VOUT) falling 0.4 0.5 0.75 V
Hysteresis 0.1 0.25 0.4
VOL Low level output voltage IPG = 1 mA 0.2 0.4
Leakage current VPG = 18 V 1 μA
THERMAL SHUTDOWN
TSD Thermal shutdown Junction temperature rising 160 °C
Hysteresis 10