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

 

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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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

Parametrics

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Part number Order 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 Type Package size: mm2:W x L (PKG)
TPS54531 Order now 3.5     28     0.8     25     5     1     570     570     0.11     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Fixed    
Current Mode     90     -40 to 85     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS54231 Order now 3.5     28     0.8     25     2     1     570     570     0.075     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SOIC | 8     Converter     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
TPS54232 Order now 3.5     28     0.8     25     2     1     1000     1000     0.085     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SOIC | 8     Converter     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
TPS54233 Order now 3.5     28     0.8     25     2     1     300     300     0.075     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SOIC | 8     Converter     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
TPS54331 Order now 3.5     28     0.8     25     3     1     570     570     0.11     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SO PowerPAD | 8
SOIC | 8