• - 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 TPS51511 is a 350-kHz D-CAP-mode synchronous switcher with a 2-A, source-only low drop-out (LDO) regulator. It is specifically designed for low cost/low noise/low external-component count power systems for GPU applications. The integrated 'OD' switch in the buck controller supports dynamic output voltage change. The current mode option of the synchronous buck converter can support pure output ceramic-capacitor applications. The open-drain LDO power-good signal can be accessed through the OD pin when it is needed in the application. The TPS51511 is available in the thermally-enhanced 20-pin QFN package, and is specified from -40°C to 85°C.

特性

• Switcher Controller:
  • Adjustable-Output Buck Converter, 0.75 V to 3.3 V
  • Wide Input Voltage Range: 3.0-V to 28-V
  • D-CAP™ Mode with 100-ns Load Step Response
  • Current Mode Option Supports Ceramic Output Capacitors
  • Current Sensing From R_DS(ON) or Resistor
  • Internal Switch Supports Dynamic Output Voltage Change
  • Advanced PGOOD Mask Feature
  • Equipped With PGOOD, OVP and UVP
  • Output Discharge
  • 5 V UVLO Protection
• LDO Regulator:
  • 2-A LDO for GPU I/O Power
  • Input Range: Up to 5 V
  • Output Range: 0.75 V to 3.3 V
  • Requires Only 20-µF Ceramic Output Capacitor for LDO Output
  • Optional PGOOD
  • Output Discharge
  • Thermal Shutdown
• APPLICATIONS