TPS51216-EP中文资料增强型产品完整 DDR2、DDR3 和 DDR3L 存储器电源解决方案同步降压控制器数据手册TI规格书

描述 Description

The TPS51216-EP provides a complete power supply for DDR2, DDR3 and DDR3L memory systems in the lowest total cost and minimum space. It integrates a synchronous buck regulator controller (VDDQ) with a 2-A sink/source tracking LDO (VTT) and buffered low noise reference (VTTREF). The TPS51216-EP employs D-CAP mode coupled with 300 kHz/400 kHz frequencies for ease-of-use and fast transient response. The VTTREF tracks VDDQ/2 within excellent 0.8% accuracy. The VTT, which provides 2-A sink/source peak current capabilities, requires only 10-µF of ceramic capacitance. In addition, a dedicated LDO supply input is available.

The TPS51216-EP provides rich useful functions as well as excellent power supply performance. It supports flexible power state control, placing VTT at high-Z in S3 and discharging VDDQ, VTT, and VTTREF (soft-off) in S4/S5 state.

Programmable OCL with low-side MOSFET RDS(on) sensing, OVP/UVP/UVLO and thermal shutdown protections are also available.

The TPS51216-EP is available in a 20-pin, 3 mm × 3 mm, WQFN package and is specified for junction temperature from -55°C to 125°C.

特性 Features

• Synchronous Buck Controller (VDDQ)
• Output Voltage Range: 0.7 to 1.8 V
• D-CAP Mode for Fast Transient Response
• Optimized Efficiency at Light and Heavy Loads With Auto-Skip Function
• OCL/OVP/UVP/UVLO Protections
• 2-A LDO (VTT), Buffered Reference (VTTREF)
• Requires Only 10-µF of Ceramic Output Capacitance
• 0.8% VTTREF, 20-mV VTT Accuracy
• Thermal Shutdown
• Supports Defense, Aerospace, and Medical Applications
• One Assembly/Test Site
• Available in Military (-55°C to 125°C) Temperature Range
• Extended Product-Change Notification
• Product Traceability