TPS51116RGE
完整的DDR ， DDR2和DDR3内存的电源解决方案同步降压控制器， 3 -A LDO ，缓冲基准 COMPLETE DDR, DDR2 AND DDR3 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE
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