• - 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

The TPS54550 is a medium output current synchronous buck PWM converter with an integrated high side MOSFET and a gate driver for an low side external MOSFET. Features include a high performance voltage error amplifier that enables maximum performance under transient conditions and flexibility in choosing the output filter inductors and capacitors. The TPS54550 has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4.5 V; a slow-start circuit to limit in-rush currents; and a power good output to indicate valid output conditions. The synchronization feature is configurable as either an input or an output for easy 180° out of phase synchronization.

The TPS54550 device is available in a thermally enhanced 16-pin TSSOP (PWP) PowerPAD™ package.

特性

• 40 m MOSFET Switch for High Efficiency at 6-A (7.5 Peak) Output Current
• Uses External Lowside MOSFET
• Output Voltage Adjustable Down to 0.891 V With 1% Accuracy
• Synchronizes to External Clock
• 180° Out of Phase Synchronization
• Wide PWM Frequency— Fixed 250 kHz, 500 kHz or Adjustable 250 kHz to 700 kHz
• Adjustable Slow Start
• Adjustable Undervoltage Lockout
• Load Protected by Peak Current Limit and Thermal Shutdown
• 16-Pin TSSOP PowerPAD™ Package
• SWIFT Documentation Application Notes, and Design Software: www.ti.com/swift
• APPLICATIONS
  • Industrial and Commercial Low Power Systems
  • LCD Monitors and TVs
  • Computer Peripherals
  • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors