MIC5164 Datasheet, PDF (1/23 Pages) Micrel Semiconductor – Dual Regulator Controller for DDR3 GDDR3/4/5 Memory and High-Speed Bus Termination

MIC5164
Dual Regulator Controller for DDR3
GDDR3/4/5 Memory and High-Speed
Bus Termination
General Description
Features
The MIC5164 is a dual regulator controller designed for
high speed bus termination. It offers a simple, low-cost
JEDEC-compliant solution for terminating high-speed, low-
voltage digital buses (i.e. DDR, DDR2, DDR3, SCSI, GTL,
SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc)
with a Power Good (PG) signal.
• Input voltage range: 1.35V to 6V
• Up to 7A V_TT Current
• Tracking programmable output
• Power Good (PG) signal
• Wide bandwidth
The MIC5164 controls two external N-Channel MOSFETs
to form two separate regulators. It operates by switching
between either the high-side MOSFET or the low-side
MOSFET depending on whether the current is being
sourced to the load or sunk by the regulator.
Designed to provide a universal solution for bus
termination regardless of input voltage, output voltage, or
load current, the desired MIC5164 output voltage can be
programmed by forcing the reference voltage externally to
the desired voltage.
The MIC5164 operates from an input of 1.35V to 6V, with
a second bias supply input required for operation. It is
available in the tiny MSOP-10 package with an operating
junction temperature range of −40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• Logic controlled enable input
• Requires minimal external components
• DDR, DDR2, DDR3, memory termination
• −40°C < T_J < +125°C
• JEDEC-compliant bus termination for SCSI, GTL, SSTL,
HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc
• Tiny MSOP-10 package
Applications
• Desktop computers
• Notebook computers
• Communication systems
• Video cards
• DDR/DDR2/DDR3 memory termination
____________________________________________________________________________________________________________
Typical Application
Typical SSTL-2 Application
(Two MOSFETs Support a 3.5A Application)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 2010
M9999-061510