TPS54331 3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode | TI.com

TPS54331
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode

 

Recommended alternative parts

  • TPS54231  -  Looking for a device with less output current? Try the TPS54231.
  • TPS54332  -  Looking for a device with higher switching frequency? Try theTPS54332.

Description

The TPS54331 device is a 28-V, 3-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 undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have 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 3-A Continuous Output Current
  • High Efficiency at Light Loads With a Pulse Skipping Eco-mode™
  • Fixed 570 kHz Switching Frequency
  • Typical 1-µA Shutdown Quiescent 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 SOIC8 Package or Thermally Enhanced SOIC8 PowerPAD™ Package
  • Create a Custom Design with WEBENCH Tools

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WEBENCH® Designer TPS54331

  Min   Max Range
Vin  V 3.5 to 28.0V
Vout  V 0.8 to 25V
Iout  A ≤ 3A
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)
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    
Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 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)    
TPS54332 Order now 3.5     28     0.8     25     3.5     1     1000     1000     0.082     Enable
Light Load Efficiency
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SO PowerPAD | 8