The TPS54331 is a 28-V, 3-A non-synchronous buck converter that integrates a low R_DS(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 TPS54331 is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

• Qualified for Automotive Applications
• 3.5V to 28V Input Voltage Range
• Adjustable Output Voltage Down to 0.8V
• Integrated 80 mΩ High Side MOSFET Supports up to 3A Continuous Output Current
• High Efficiency at Light Loads with Pulse Skipping Eco-mode? Control
• Fixed 570kHz Switching Frequency
• Typical 1μA 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
• Supported by SwitcherPro? Software Tool (http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)
• strong>For SWIFT? Documentation, See the TI Website at www.ti.com/swift
• APPLICATIONS
  • 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

SWIFT, Eco-mode, SwitcherPro, PowerPAD are trademarks of Texas Instruments.

• Vin (Min) (V)
• 3.5
• Vin (Max) (V)
• 28
• Vout (Min) (V)
• 0.8
• Vout (Max) (V)
• 25
• Iout (Max) (A)
• 3
• Iq (Typ) (uA)
• 110
• Switching frequency (Min) (kHz)
• 570
• Switching frequency (Max) (kHz)
• 570
• Features
• Enable, Light Load Efficiency, UVLO Adjustable
• Rating
• Automotive
• Regulated outputs (#)
• 1
• Control mode
• Current Mode
• Duty cycle (Max) (%)
• 90

TPS54331-Q1的完整型号有：TPS54331QDRQ1，以下是这些产品的关键参数及官网采购报价：

TPS54331QDRQ1，工作温度：-40 to 150，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS54331QDRQ1的批量USD价格：1.309（1000+）

TPS54331EVM-232 — TPS54331 28V 输入、3.3V 输出、3A 评估模块

TPS54331EVM-232 是一款组装完备且经过测试的电路，用于评估 TPS54331 同步降压 SWIFT™ 转换器。此 EVM 可将 3.5V 至 28V 的输入电压转换为 3.3V 的稳压输出电压，输出电流最高为 3A。开关频率在内部设置为 570kHz 的标称值。TPS54331 封装内部采用了高侧 MOSFET 以及栅极驱动电路。MOSFET 的低漏源导通电阻有助于 TPS54331 实现高效率 (91.6%)，即使在输出电流较高的情况下也能保持低结温。补偿组件位于集成电路 (IC) 外部，而外部除法器能实现可调节的输出电压。此外，TPS54331 (...)

TPS54331-Q1 PSpice Transient Model

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)