TPS51116RGER

DDR/DDR2/DDR3的同步降压控制器和LDO

DESCRIPON

The TPS51116 provides a complete power supply for DDR/SSTL-2, DDR2/SSTL-18, and DDR3 memory

systems. It integrates a synchronous buck controller with a 3-A sink/source tracking linear regulator and

buffered low noise reference.

FEATURES

• Synchronous Buck Controller VDDQ

– Wide-Input Voltage Range: 3.0-V to 28-V

– D−CAP™ Mode with 100-ns Load Step Response

– Current Mode Option Supports Ceramic Output Capacitors

– Supports Soft-Off in S4/S5 States

– Current Sensing from RDSon or Resistor

– 2.5-V DDR, 1.8-V DDR2, Adjustable to 1.5-V DDR3 or Output Range 0.75-V to 3.0-V

– Equipped with Powergood, Overvoltage Protection and Undervoltage Protection

• 3-A LDO VTT, Buffered Reference VREF

– Capable to Sink and Source 3 A

– LDO Input Available to Optimize Power Losses

– Requires only 20-µF Ceramic Output Capacitor

– Buffered Low Noise 10-mA VREF Output

– Accuracy 20 mV for both VREF and VTT

– Supports High-Z in S3 and Soft-Off in S4/S5

– Thermal Shutdown

APPLICATIONS

• DDR/DDR2/DDR3/LPDDR3 Memory Power Supplies

• SSTL-2 SSTL-18 and HSTL Termination