SLVUC07A December   2020  – May 2021 TPS543320

 

  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 Hiccup Current Limit
    11. 3.11 Overvoltage Protection
    12. 3.12 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 TPS543320EVM performance characteristics is provided in Table 1-2 and Table 1-3. The TPS543320EVM is designed and tested for VIN = 4 V to 18 V. Characteristics are given for an input voltage of VIN = 12 V and output voltages of 1.8 V and 3.3 V, unless otherwise specified. The ambient temperature is room temperature (20°C to 25°C) for all measurements, unless otherwise noted.

Table 1-2 TPS543320EVM Small Size (U1) 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 12 mA
VIN = 5 V, IO = 3 A 1.23 A
VIN start voltage Set by internal UVLO 3.95 V
VIN stop voltage Set by internal UVLO 3.8 V
Output voltage setpoint 1.8 V
Output current range VIN = 4 V to 18 V 0 3 A
Line and load regulation VIN = 4 V to 18 V, IO = 0 A to 3 A ±0.1%
Load transient response IO = 0.75 A to 2.25 A Voltage change –75 mV
Recovery time to within ±0.5% 32 µs
IO = 2.25 A to 0.75 A Voltage change 75 mV
Recovery time to within ±0.5% 32 µs
Loop bandwidth RO = 0.72 Ω 117 kHz
Phase margin 51 degrees
Input ripple voltage IO = 3 A 18 mVPP
Output ripple voltage IO = 3 A 16 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 = 1.5 A 94.7%
VIN = 12 V, IO = 2.5 A 91.6%
IC case temperature VIN = 12 V, IO = 3 A, 15-minute soak 35.1 °C
Table 1-3 TPS543320EVM 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 21.8 mA
VIN = 5 V, IO = 3 A 2.1 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 5 and 6 3.3 V
Output current range VIN = 4 V to 18 V 0 3 A
Line and load regulation VIN = 4 V to 18 V, IO = 0 A to 3 A ±0.1%
Load transient response IO = 0.75 A to 2.25 A Voltage change –200 mV
Recovery time to within ±0.5% 28 µs
IO = 0.75 A to 2.25 A Voltage change 200 mV
Recovery time to within ±0.5% 28 µs
Loop bandwidth RO = 1.32 Ω, J18 short pins 3 and 4 56 kHz
Phase margin 48 degrees
Input ripple voltage IO = 3 A 130 mVPP
Output ripple voltage IO = 3 A 130 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 = 1.75 A 96.09%
VIN = 12 V, IO = 2.5 A 93.71%
IC case temperature VIN = 12 V, IO = 3 A, 15-minute soak 33.2 °C