TPS51216 Series

DDR2/3/3L/4 Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Reference

Catalog

DDR2/3/3L/4 Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Reference

Part	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Voltage - Output [Max]	Voltage - Output [Min]	Applications	Supplier Device Package	Voltage - Input [Max]	Voltage - Input [Min]	Number of Outputs
Texas Instruments TPS51216RUKR	Surface Mount	85 °C	-40 °C	20-WFQFN Exposed Pad	1.8 V	0.7 V	Controller DDR	20-WQFN (3x3)	5.5 V	4.5 V	2

Catalog

DDR2/3/3L/4 Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Reference

Key Features

• Synchronous Buck Controller (VDDQ)Conversion Voltage Range: 3 V to 28 VOutput Voltage Range: 0.7 V to 1.8 V0.8% VREFAccuracyD-CAP™ Mode for Fast Transient ResponseSelectable 300 kHz/400 kHz Switching FrequenciesOptimized Efficiency at Light and Heavy Loads with Auto-skip FunctionSupports Soft-Off in S4/S5 StatesOCL/OVP/UVP/UVLO ProtectionsPowergood Output2-A LDO(VTT), Buffered Reference(VTTREF)2-A (Peak) Sink and Source CurrentRequires Only 10-μF of Ceramic Output CapacitanceBuffered, Low Noise, 10-mA VTTREF Output0.8% VTTREF, 20-mV VTT AccuracySupport High-Z in S3 and Soft-Off in S4/S5Thermal Shutdown20-Pin, 3 mm × 3 mm, QFN PackageAPPLICATIONSDDR2/DDR3/DDR3L Memory Power SuppliesSSTL_18, SSTL_15, SSTL_135 and HSTL TerminationSynchronous Buck Controller (VDDQ)Conversion Voltage Range: 3 V to 28 VOutput Voltage Range: 0.7 V to 1.8 V0.8% VREFAccuracyD-CAP™ Mode for Fast Transient ResponseSelectable 300 kHz/400 kHz Switching FrequenciesOptimized Efficiency at Light and Heavy Loads with Auto-skip FunctionSupports Soft-Off in S4/S5 StatesOCL/OVP/UVP/UVLO ProtectionsPowergood Output2-A LDO(VTT), Buffered Reference(VTTREF)2-A (Peak) Sink and Source CurrentRequires Only 10-μF of Ceramic Output CapacitanceBuffered, Low Noise, 10-mA VTTREF Output0.8% VTTREF, 20-mV VTT AccuracySupport High-Z in S3 and Soft-Off in S4/S5Thermal Shutdown20-Pin, 3 mm × 3 mm, QFN PackageAPPLICATIONSDDR2/DDR3/DDR3L Memory Power SuppliesSSTL_18, SSTL_15, SSTL_135 and HSTL Termination

Description

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 RDS(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. 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 RDS(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.