• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

As a member of the SWIFT™ family of DC/DC regulators, the TPS5450 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features are a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown.

特性

• Wide Input Voltage Range: 5.5 V to 36 V
• Up to 5-A Continuous (6-A Peak) Output Current
• High Efficiency Greater than 90% Enabled by 110-m Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
• Internal Compensation Minimizes External Parts Count
• Fixed 500 kHz Switching Frequency for Small Filter Size
• 18 µA Shut Down Supply Current
• Improved Line Regulation and Transient Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
• -40°C to 125°C Operating Junction Temperature Range
• Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD Package
• For SWIFT™ Documentation, Application Notes and Design Software, See the TI Website at www.ti.com/swift
• APPLICATIONS
  • High Density Point-of-Load Regulators
  • LCD Displays, Plasma Displays
  • Battery Chargers
  • 12-V/24-V Distributed Power Systems