TPS51716RUKR Power Path Management IC PMIC Mem Pwr Solution Sync Cntlr 2A LDO

1 Features

• Synchronous Buck Controller (VDDQ)

• – Conversion Voltage Range: 3 to 28 V

• – Output Voltage Range: 0.7 to 1.8 V

• – 0.8% VREF Accuracy

• – D-CAP2TM Mode for Ceramic Output Capacitors

• – Selectable 500-kHz/670-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, WQFN Package

2 Applications

• DDR2, DDR3, DDR3L, LPDDR3, and DDR4 Memory Power Supplies

• SSTL_18, SSTL_15, SSTL_135, and HSTL Termination

3 Description

The TPS51716 provides a complete power supply for DDR2, DDR3, DDR3L, LPDDR3, and DDR4 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 TPS51716 employs D-CAP2 mode coupled with 500 kHz or 670 kHz operating frequencies that supports ceramic output capacitors without an external compensation circuit. The VTTREF tracks VDDQ/2 with excellent 0.8% accuracy. The VTT, which provides 2-A sink/source peak current capabilities, requires only 10 μF of ceramic capacitance. In addition, the device features a dedicated LDO supply input.

The TPS51716 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. It includes programmable OCL with low-side MOSFET RDS(on) sensing, OVP/UVP/UVLO and thermal shutdown protections.

TI offers the TPS51716 in a 20-pin, 3 mm × 3 mm, WQFN package and specifies it for an ambient temperature range between –40°C and 85°C.

Device Information