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

TPS54531 (ACTIVE)

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.

Description

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.

Features

  • 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
    Current
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • Fixed 570kHz Switching Frequency
  • Typical 1µA Shutdown Quiescen
    Current
  • Adjustable Slow Start Limits Inrush
    Currents
  • 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)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
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    
Enable
Light Load Efficiency    
Enable
Light Load Efficiency
UVLO Adjustable    
Enable
Light Load Efficiency
UVLO Adjustable    
Enable
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
SOIC    
SO PowerPAD
VSON    
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WEBENCH® Power Designer is now even easier to use. Learn more.

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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