MIC5166 Datasheet, PDF (1/25 Pages) Micrel Semiconductor – 3A High-Speed Low VIN DDR Terminator

MIC5166
3A High-Speed Low V_IN DDR Terminator
General Description
The MIC5166 is a 3A, high-speed, linear, low V_IN, 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 which may cause excessive voltage
ripple at the DDR memory.
The MIC5166 contains a precision voltage divider network
in order to take in the V_DDQ voltage as a reference voltage
and conveniently output the terminator voltage (V_TT) at one
half of the V_DDQ input voltage.
The MIC5166 is capable of sinking and sourcing up to 3A.
It is stable with only two 10µF ceramic output capacitors.
The part is available in a small 3mm × 3mm MLF^®
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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Operating voltage range:
• V_DDQ Supply: 0.9V to 3.6V
• Bias Supply: 2.5V to 5.5V
• High bandwidth – very fast transient response
• Stable with two 10µF ceramic output capacitors
• Two 10µF 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 3mm × 3mm MLF^®
• Junction temperature range –40°C to +125°C
Applications
• Desktop computers
• Notebook computers
• Datacom systems
• Servers
• Video cards
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Typical Application
Ramp Control is a trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 2012
M9999-060612-A