SY20735DBC - Sink and Source DDR Termination Regulator


  • Input Voltage: Supports 2.5V Rail and 3.3V Rail
  • VLDOIN Voltage Range: 1.1V to 3.5V
  • Sink and Source Termination Regulator Includes Droop Compensation.
  • Requires Minimum Output Capacitance of 20µF(Typically 3×10µF MLCCs) for Memory.
  • PGOOD to Monitor Output Regulation
  • Enable Function Option
  • REFIN Input Allows for Flexible Input Tracking either Directly or Through Resistor Divider
  • Remote Sensing(VOSNS)
  • ±10mA Buffered Reference(REFOUT)
  • Built-in Soft-start, UVLO, and OCL
  • Thermal Shutdown Protection
  • Supports DDR, DDR2, DDR3, DDR3L, Low Power DDR3, DDR4 VTT Applications
  • Compacted Package: DFN3×3-10 with Thermal Pad

Typical Application


The SY20735 is a sink and source double data rate (DDR) regu­lator designed for use in low input voltage, low-cost, low-noise systems where space is a key consideration. It maintains a fast transient response and requires a minimum output capacitance of only 20µF and all power requirements for DDR, DDR2, DDR3, DDR3L, Low-Power DDR3 and DDR4 VTT BUS termination. Additionally, it provides an open-drain PGOOD signal to monitor the output regulation and an EN signal that can be used to discharge VTT during S3(suspend to RAM) for DDR application

The SY20735 is available in the DFN3×3-10 thermal pad package, and it's rated both Green and Pb-free. It's specified from -40°C to 85°C.


  • Memory Termination Regulator for DDR, DDR2, DDR3, DDR3L, Low-Power DDR3 and DDR4
  • Notebooks, Desktops, and Servers
  • Base Stations