TPS51216

DDR2/3/3L/4 存储器电源解决方案同步降压控制器，2A LDO，缓冲参考

The 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 RDSon 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 LDOVTT, Buffered ReferenceVTTREF

.

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

.

APPLICA ONS

.

DDR2/DDR3/DDR3L Memory Power Supplies

.

SSTL_18, SSTL_15, SSTL_135 and HSTL Termination