The TPS51216 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 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 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 R_DS(on) sensing, OVP/UVP/UVLO and thermal shutdown protections are also available.

The TPS51216 is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified for ambient temperature from –40°C to 85°C.

• Synchronous Buck Controller (VDDQ)
  • Conversion Voltage Range: 3 V to 28 V
  • Output Voltage Range: 0.7 V to 1.8 V
  • 0.8% VREF Accuracy
  • D-CAP Mode for Fast Transient Response
  • Selectable 300 kHz/400 kHz Switching Frequencies
  • Optimized Efficiency at Light and Heavy Loads with Auto-skip Function
  • Supports Soft-Off in S4/S5 States
  • OCL/OVP/UVP/UVLO Protections
  • Powergood Output
• 2-A LDO(VTT), Buffered Reference(VTTREF)
  • 2-A (Peak) Sink and Source Current
  • Requires Only 10-μF of Ceramic Output Capacitance
  • Buffered, Low Noise, 10-mA VTTREF Output
  • 0.8% VTTREF, 20-mV VTT Accuracy
  • Support High-Z in S3 and Soft-Off in S4/S5
• Thermal Shutdown
• 20-Pin, 3 mm × 3 mm, QFN Package
• APPLICATIONS
  • DDR2/DDR3/DDR3L Memory Power Supplies
  • SSTL_18, SSTL_15, SSTL_135 and HSTL Termination

• DDR memory type
• DDR, DDR2, DDR3, DDR3L, DDR4, LPDDR2, LPDDR3
• Control mode
• D-CAP, S4/S5
• Iout VDDQ (Max) (A)
• 20
• Iout VTT (Max) (A)
• 2
• Iq (Typ) (mA)
• 0.6
• Output
• VDDQ, VREF, VTT
• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 28
• Features
• Complete Solution, Eco Mode, S3/S5 Support
• Rating
• Catalog

TPS51216的完整型号有：TPS51216RUKR、TPS51216RUKT，以下是这些产品的关键参数及官网采购报价：

TPS51216RUKR，工作温度：-40 to 85，封装：WQFN (RUK)-20，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS51216RUKR的批量USD价格：0.474（1000+）

TPS51216RUKT，工作温度：-40 to 85，封装：WQFN (RUK)-20，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS51216RUKT的批量USD价格：0.569（1000+）

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