3.5V to 28V Input, 5A, 570kHz Step-Down Converter with Eco-mode

3.5V to 28V Input, 5A, 570kHz Step-Down Converter with Eco-mode - TPS54531

Recommended alternative parts

  • TPS54528  -  Looking for a device with lower input voltage? Try the TPS54528.
  • TPS54627  -  Looking for a device with more output current? Try the TPS54627.
  • TPS54331  -  Looking for a device with less output current? Try the TPS54331.


The TPS54531 device is a 28-V, 5-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input under-voltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency fold back, and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54531 device is available in 8-pin SO PowerPAD™ package that has been internally optimized to improve thermal performance.


  • 3.5 to 28-V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80-mΩ High-Side MOSFET
    Supports up to 5-A Continuous Output
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • Fixed 570kHz Switching Frequency
  • Typical 1µA Shutdown Quiescen
  • Adjustable Slow Start Limits Inrush
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle-by-Cycle Current-Limit, Frequency
    Fold Back, and Thermal Shutdown Protection
  • Available in Easy-to-Use Thermally Enhanced
    8-Pin SO PowerPAD™ Package

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
TPS54531 TPS54231 TPS54331 TPS54336A
3.5    3.5    3.5    4.5   
28    28    28    28   
0.8    0.8    0.8    0.8   
25    25    25    25   
5    2    3    3   
1    1    1    1   
570    570    570    340   
570    570    570    340   
0.11    0.075    0.11    0.6   
Light Load Efficiency   
Light Load Efficiency
UVLO Adjustable   
Light Load Efficiency
UVLO Adjustable   
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Current Mode    Current Mode    Current Mode    Current Mode   
90    90    90    90   
-40 to 85    -40 to 150    -40 to 150    -40 to 150   
Catalog    Catalog    Catalog    Catalog   
SO PowerPAD    SOIC    SO PowerPAD
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WEBENCH® Designer TPS54531

  Min   Max Range
Vin  V 3.5 to 28.0V
Vout  V 0.8 to 25V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 150°C

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