SLVS642F April   2006  – January 2024 TPS5420

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Electrostatic Discharge Caution
  6. 5Ordering Information
  7. 6Pin Assignments
    1. 6.1 Terminal Functions
  8. 7Specifications
    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
  9. 8Application Information
    1. 8.1 Functional Block Diagram
    2. 8.2 Detailed Description
      1. 8.2.1  Oscillator Frequency
      2. 8.2.2  Voltage Reference
      3. 8.2.3  Enable (ENA) and Internal Slow Start
      4. 8.2.4  Undervoltage Lockout (UVLO)
      5. 8.2.5  Boost Capacitor (BOOT)
      6. 8.2.6  Output Feedback (VSENSE)
      7. 8.2.7  Internal Compensation
      8. 8.2.8  Voltage Feed Forward
      9. 8.2.9  Pulse-Width-Modulation (PWM) Control
      10. 8.2.10 Overcurrent Limiting
      11. 8.2.11 Overvoltage Protection
      12. 8.2.12 Thermal Shutdown
      13. 8.2.13 PCB Layout
      14. 8.2.14 Application Circuits
      15. 8.2.15 Design Procedure
        1. 8.2.15.1  Design Parameters
        2. 8.2.15.2  Switching Frequency
        3. 8.2.15.3  Input Capacitors
        4. 8.2.15.4  Output Filter Components
          1. 8.2.15.4.1 Inductor Selection
          2. 8.2.15.4.2 Capacitor Selection
          3.        40
          4.        41
        5. 8.2.15.5  Output Voltage Setpoint
        6. 8.2.15.6  Boot Capacitor
        7. 8.2.15.7  Catch Diode
        8. 8.2.15.8  Additional Circuits
        9. 8.2.15.9  Circuit Using Ceramic Output Filter Capacitors
        10. 8.2.15.10 Output Filter Component Selection
        11. 8.2.15.11 External Compensation Network
    3. 8.3 Advanced Information
      1. 8.3.1 Output Voltage Limitations
      2. 8.3.2 Internal Compensation Network
      3. 8.3.3 Thermal Calculations
    4. 8.4 Performance Graphs
  10. 9Revision History

Package Options

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

7.5 Electrical Characteristics

TJ = –40°C to +125°C, VIN = 5.5 V to 36 V. Typical values are at TJ = 25°C and VIN = 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
IQ(VIN) VIN quiescent current           Non-switching, VSENSE = 2 V, PH pin open 2 4.4 mA
ISD(VIN) VIN shutdown supply current           
      		 Shutdown, ENA = 0 V 15 50 µA
UVLO
VINUVLO(R) VIN UVLO rising threshold 
                		 VVIN rising 5.3 5.5 V
VINUVLO(H) VIN UVLO hysteresis             0.35 V
VOLTAGE REFERENCE
VFB FB voltage TJ = 25°C  1.202 1.221 1.239 V
VFB FB voltage TJ = –40°C to 125°C 1.196 1.221 1.245 V
OSCILLATOR
fSW Switching frequency 400 500 600 kHz
tON(min) Minimum ON pulse width 150 200 ns
DMAX Maximum Duty Cycle fSW = 500kHz 85% 89%
ENABLE (ENA PIN)
VEN(R) ENA voltage rising threshold 1.3 V
VEN(F) ENA voltage falling threshold 0.5 V
VEN(H) ENA voltage hysteresis 325 mV
tSS Internal slow-start time (0~100%) 6.6 8 10 ms
OVERCURRENT PROTECTION
IHS(OC) High-side peak current limit 3 4 5 A
Hiccup time before re-start 13 16 20 ms
OUTPUT MOSFET
RDSON(HS) High-side MOSFET on-resistance VIN = 12 V, VBOOT-SW = 4.5 V 100 230 mΩ
RDSON(HS) High-side MOSFET on-resistance VIN = 5.5 V, VBOOT-SW = 4.0 V 125 mΩ
THERMAL SHUTDOWN
TJ(SD) Thermal shutdown threshold (1) Temperature rising 135 162 °C
TJ(HYS) Thermal shutdown hysteresis (1) 14 °C
(1) Parameter specified by design, statistical analysis and production testing of correlated parameters. Not production tested.