TPS54331 (正在供货)

具有 Eco-mode 的 3.5V 至 28V 输入、3A、570kHz 降压转换器

具有 Eco-mode 的 3.5V 至 28V 输入、3A、570kHz 降压转换器 - TPS54331


  • TPS54531  -  Looking for a device with more output current? Try the TPS54531.
  • TPS54339E  -  Looking for a device with lower input voltage? Try the TPS54339E.
  • TPS54231  -  Looking for a device with less output current? Try the TPS54231.
  • TPS54332  -  Looking for a device with higher switching frequency? Try theTPS54332.


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.


  • 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
  • High Efficiency at Light Loads With a
    Pulse Skipping Eco-mode™
  • Fixed 570 kHz Switching Frequency
  • Typical 1-µA Shutdown Quiescent
  • 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 SOIC8 Package or
    Thermally Enhanced SOIC8 PowerPAD™ Package
  • Supported by WEBENCH® Software Tool
    • Consumer Applications such as Set-Top Boxes,
      CPE Equipment, LCD Displays, Peripherals, and
      Battery Chargers
    • Industrial and Car-Audio Power Supplies
    • 5-V, 12-V, and 24-V Distributed Power Systems

WEBENCH Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners


参数 与其它产品相比 降压转换器 (集成开关)

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
TPS54331 TPS54231 TPS54308 TPS54336A TPS54531
3.5    3.5    4.5    4.5    3.5   
28    28    28    28    28   
0.8    0.8    1    0.8    0.8   
25    25    26    25    25   
3    2    3    3    5   
1    1    1    1    1   
570    570    350    340    570   
570    570    350    340    570   
0.11    0.075    0.3    0.6    0.11   
Light Load Efficiency
UVLO Adjustable   
Light Load Efficiency
UVLO Adjustable   
Forced Pulse Width Modulation (FPWM) Mode
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Light Load Efficiency   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
90    90    100    90    90   
-40 to 150    -40 to 150    -40 to 125    -40 to 150    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog   
SOIC    SOT-23-THIN    SO PowerPAD
SO PowerPAD   

其它合格版本 TPS54331

版本 器件型号 定义
汽车电子 TPS54331-Q1 Q100 适用于追求零缺陷的高可靠性汽车电子应用的器件
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WEBENCH® Designer TPS54331

  最小   最大 范围
输入电压  V 3.5 to 28.0V
输出电压  V 0.8 to 25V
输出电流  A ≤ 3A
环境温度  °C -40 to 150°C

覆盖面积 BOM成本 效率

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