SLUUCE9A December   2020  – April 2021 TPS543820 , TPS543820E

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Before You Begin
    3. 1.3 Performance Characteristics Summary
  3. 2Configurations and Modifications
    1. 2.1 Output Voltage
    2. 2.2 Switching Frequency (FSEL Pin)
    3. 2.3 Current Limit, Soft-Start Time, and Internal Compensation (MODE Pin)
    4. 2.4 Adjustable UVLO
  4. 3Test Setup and Results
    1. 3.1  Input/Output Connections
    2. 3.2  Efficiency
    3. 3.3  Output Voltage Regulation
    4. 3.4  Load Transient and Loop Response
    5. 3.5  Output Voltage Ripple
    6. 3.6  Input Voltage Ripple
    7. 3.7  Synchronizing to a Clock
    8. 3.8  Start-up and Shutdown with EN
    9. 3.9  Start-up and Shutdown with VIN
    10. 3.10 Start-up Into Pre-Bias
    11. 3.11 Hiccup Current Limit
    12. 3.12 Overvoltage Protection
    13. 3.13 Thermal Performance
  5. 4Board Layout
    1. 4.1 Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials
  7. 6Revision History

1.3 Performance Characteristics Summary

A summary of the TPS543820EVM performance characteristics is provided in Table 1-2 and Table 1-3. The TPS543820EVM is designed and tested for VIN = 4 V to 18 V. Characteristics are given for an input voltage of VIN = 12 V and an output voltage of 1.0 V, unless otherwise specified. The ambient temperature is room temperature (20°C to 25°C) for all measurements, unless otherwise noted.

Table 1-2 TPS543820EVM Small Size (U1) Performance Characteristics Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
VIN voltage range 4 12 13.2(1) V
Input current VIN = 12 V, IO = 0 A 14 mA
VIN = 5 V, IO = 8 A 1.90 A
VIN start voltage Set by internal UVLO 3.95 V
VIN stop voltage Set by internal UVLO 3.8 V
Output voltage setpoint 1.005 V
Output current range VIN = 4 V to 13.2 V 0 8 A
Line and load regulation VIN = 4 V to 13.2 V, IO = 0 A to 8 A +0.1%, -0.3%
Load transient response IO = 1.5 A to 4.5 A Voltage change –25 mV
Recovery time to within ±0.5% 70 µs
IO = 4.5 A to 1.5 A Voltage change 25 mV
Recovery time to within ±0.5% 70 µs
Loop bandwidth RO = 0.2 Ω 201 kHz
Phase margin 50 degrees
Input ripple voltage IO = 6 A 70 mVPP
Output ripple voltage IO = 6 A 9 mVPP
Output rise time Set by MODE pin resistor 1 ms
Current limit Set by MODE pin resistor High
Switching frequency (fSW) Set by FSEL pin resistor 1500 kHz
Peak efficiency VIN = 5 V, IO = 2.5 A 91.2%
VIN = 12 V, IO = 3.5 A 87.0%
IC case temperature VIN = 12 V, IO = 8 A, 15-minute soak 58.8 °C
(1) Max VIN limited by minimum on-time and no BOOT resistor
Table 1-3 TPS543820EVM High Efficiency (U2) Performance Characteristics Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
VIN voltage range 4 12 18 V
Input current VIN = 12 V, IO = 0 A 11 mA
VIN = 5 V, IO = 8 A 1.90 A
VIN start voltage Set by EN pin resistor divider 4.53 V
VIN stop voltage Set by EN pin resistor divider 3.98 V
Output voltage setpoint J14 short pins 1 and 2 1.003 V
Output current range VIN = 4 V to 18 V 0 8 A
Line and load regulation VIN = 4 V to 18 V, IO = 0 A to 8 A ±0.1%
Load transient response IO = 1.5 A to 4.5 A Voltage change –28 mV
Recovery time to within ±0.5% 60 µs
IO = 4.5 A to 1.5 A Voltage change 25 mV
Recovery time to within ±0.5% 60 µs
Loop bandwidth RO = 0.2 Ω, J18 short pins 3 and 4 140 kHz
Phase margin 56 degrees
Input ripple voltage IO = 6 A 90 mVPP
Output ripple voltage IO = 6 A 6 mVPP
Output rise time Set by MODE pin resistor, All default J18 options 1 ms
Current limit Set by MODE pin resistor, J18 short pins 1 and 2, 3 and 4, or 5 and 6 High
Switching frequency (fSW) Set by FSEL pin resistor, J17 short pins 3 and 4 1000 kHz
Peak efficiency VIN = 5 V, IO = 2 A 92.4%
VIN = 12 V, IO = 3 A 89.3%
IC case temperature VIN = 12 V, IO = 8 A, 15-minute soak 53.6 °C