TPS51511数据手册集成电路（IC）的稳压器-线性+开关规格书PDF

描述 Description

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 Features

• 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 RDS(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
• GPU Power
• Notebook Computers

D-CAP, PowerPAD are trademarks of Texas Instruments.