Features
• Operating Voltage Range:
- VDDQ Supply: 0.9V to 3.6V
- Bias Supply: 2.5V to 5.5V
• High Bandwidth: Very Fast Transient Response
• Stable with Two 10 µF Ceramic Output Capacitors
• Two 10 µF Output Capacitors used in Most
Applications
• High Output Voltage Accuracy:
- 0.015% Line Regulation
- 1.5% Load Regulation
• Logic Level Enable Input
• Power Good (PG)
• Thermally Enhanced 3 mm x 3 mm DFN
• Junction Temperature Range –40°C to +125°C
• This Device Meets DDR4 Requirements

Applications
• Desktop Computers
• Notebook Computers
• Datacom Systems
• Servers
• Video Cards

General Description
The MIC5166 is a 3A, high-speed, linear, low VIN,
double data rate (DDR), memory terminator power
supply. The part is small and requires small output
capacitors, making it a tiny overall solution. This allows
it to be conveniently placed close to the DDR memory,
minimizing circuit board layout inductance that may
cause excessive voltage ripple at the DDR memory.
The MIC5166 contains a precision voltage divider
network in order to take in the VDDQ voltage as a
reference voltage and conveniently output the
terminator voltage (VTT) at one half of the VDDQ input
voltage.
The MIC5166 is capable of sinking and sourcing up to
3A. It is stable with only two 10 µF ceramic output
capacitors. The part is available in a small 3 mm x
3 mm DFN thermally-enhanced package.
The MIC5166 has a high-side NMOS output stage
offering very low output impedance, and very high
bandwidth. The NMOS output stage offers a unique
ability to respond very quickly to sudden load changes
such as is required for DDR memory termination power
supply applications.