SLVSE31C January   2018  – July 2018 TPSM84209

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application
      2.      Efficiency vs Output Current
  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 Typical Characteristics (VIN = 5 V)
    7. 6.7 Typical Characteristics (VIN = 12 V)
    8. 6.8 Typical Characteristics (VIN = 24 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Adjusting the Output Voltage
      2. 7.3.2  Input Capacitor Selection
      3. 7.3.3  Undervoltage Lockout (UVLO)
      4. 7.3.4  Output Capacitor Selection
      5. 7.3.5  Feed-Forward Capacitor
      6. 7.3.6  Operating Range
      7. 7.3.7  Output Current Rating
      8. 7.3.8  Enable (EN)
      9. 7.3.9  Internal Soft Start
      10. 7.3.10 Safe Start-Up Into Prebiased Outputs
      11. 7.3.11 Light Load Efficiency / Eco-Mode
      12. 7.3.12 Voltage Dropout
      13. 7.3.13 Overcurrent Protection
      14. 7.3.14 Output Overvoltage Protection (OVP)
      15. 7.3.15 Thermal Performance
      16. 7.3.16 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Eco-Mode Operation
      3. 7.4.3 Shutdown Mode
  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 Output Voltage Setpoint
        3. 8.2.2.3 Input Capacitors
        4. 8.2.2.4 Output Capacitors
        5. 8.2.2.5 Enable Control
      3. 8.2.3 Application Waveforms
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 EMI
      1. 10.3.1 EMI Plots
    4. 10.4 Package Specifications
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Custom Design With WEBENCH® Tools
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information

6.5 Electrical Characteristics

Over –40°C to +85°C ambient temperature, VIN = 12 V, VOUT = 3.3 V, IOUT = 2.5 A, (unless otherwise noted); CIN1 = 10-µF, 50-V, 1210 ceramic; CIN2 = 100-µF, 35-V, electrolytic; COUT = 2 × 47-µF, 16-V, 1210 ceramic. Minimum and maximum limits are specified through production test or by design. Typical values represent the expected value for the given test conditions and may or may not be production tested.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT VOLTAGE (VIN)
VIN Input voltage Over IOUT range 4.5(1) 28(2) V
UVLO VIN undervoltage lockout VIN increasing 3.8 4.1 4.4 V
VIN decreasing 3.3 3.6 3.9 V
ISHDN Shutdown supply current VEN = 0 V 2 µA
OUTPUT VOLTAGE (VOUT)
VOUT(ADJ) Output voltage adjust Over IOUT range 1.2 6 V
VOUT(Ripple) Output voltage ripple 20-MHz bandwidth 22 mV
FEEDBACK
VFB Feedback voltage(4) TA = 25°C, IOUT = 0.2 A 0.581 0.596 0.611 V
Temperature variation –40°C ≤ TJ ≤ 125°C, IOUT = 0.2 A 0.5%
Line regulation TA = 25°C, 4.5 V ≤ VIN ≤ 28 V, IOUT = 0.2 A 0.2 %
Load regulation Over IOUT range, TA = 25°C 0.5 %
CURRENT
IOUT Output current Natural convection, TA = 25°C 0 2.5(3) A
Overcurrent threshold 4.8 A
PERFORMANCE
ƞ Efficiency VIN = 24 V,
IOUT = 1 A		 VOUT = 5 V 86.5%
VOUT = 3.3 V 82.7%
VOUT = 2.5 V 79.3%
VIN = 12 V,
IOUT = 1 A		 VOUT = 5 V 91.7%
VOUT = 3.3 V 89.0%
VOUT = 2.5 V 86.8%
Transient response 25% to 75% load step
1 A/µs slew rate		 Over/undershoot 90 mV
Recovery Time 125 µs
SOFT START
TSS Internal soft-start time 5 ms
SWITCHING FREQUENCY
FSW Switching frequency 578 750 923 kHz
ENABLE (EN)
VEN-RISING EN threshold Rising 1.21 1.28 V
VEN-FALLIN Falling 1.1 1.19 V
IEN EN Input current VEN = 1 V 0.7 µA
EN Hysteresis current VEN = 1.5 V 1.55 µA
THERMAL
TSHDN Thermal shutdown Shutdown temperature 165 °C
Hysteresis 10 °C
CAPACITANCE
CIN External input capacitance Ceramic type 10(5) µF
Non-ceramic type 47(5) µF
COUT External output capacitance Ceramic type min(6) 500(7) µF
Non-ceramic type 500(7) µF
(1) The minimum recommended input voltage is 4.5 V or (VOUT × 1.3), whichever is greater.
(2) The maximum input voltage varies depending on the output voltage (see Operating Range).
(3) The maximum output current that the TPSM84209 can deliver is a function of input voltage, output voltage, and ambient temperature (see Output Current Rating).
(4) The overall output voltage tolerance will be affected by the tolerance of the external RFBT and RFBB resistors.
(5) A minimum of 10 µF ceramic input capacitance is required for proper operation. An additional 47 µF of bulk capacitance is recommended for applications with transient load requirements.
(6) The minimum amount of required output capacitance varies depending on the output voltage (see Output Capacitor Selection). A minimum amount of ceramic capacitance is required. Locate the capacitance close to the device. Adding additional ceramic or non-ceramic capacitance close to the load improves the response of the regulator to load transients.
(7) The maximum output capacitance of 500 µF can be made up of all ceramic type or a combination of both ceramic and non-ceramic type.