Enhanced Product Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck Controller

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.