MIC5163_09 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – Dual Regulator Controller for DDR3 GDDR3/4/5 Memory Termination

MIC5163
Dual Regulator Controller for DDR3
GDDR3/4/5 Memory Termination
General Description
Features
The MIC5163 is a dual regulator controller designed
specifically for low voltage memory termination
applications such as DDR3 and GDDR3/4/5. The MIC5163
offers a simple, low cost JEDEC compliant solution for
terminating high-speed, low-voltage digital buses.
The MIC5163 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 being sinked by the regulator.
• 0.75V to 6V input supply voltage
• Memory termination for: DDR3, GDDR3/4/5
• Tracking programmable output
• Logic controlled enable input
• Wide bandwidth
• Minimal external components required
• Tiny MSOP-10 package
• –40°C < T_J < +125°C
Designed to provide a universal solution for memory
termination regardless of input voltage, output voltage, or
load current; the desired MIC5163 output voltage can be
externally programmed by forcing the reference voltage.
The MIC5163 operates from an input voltage as low as
0.75V up to 6V, with a second bias supply input required
for operation. The MIC5163 is available in a tiny MSOP-10
package with an operating junction temperature range of
–40°C to +125°C.
Applications
• Desktop Computers
• Servers
• Notebook computers
• Workstations
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
____________________________________________________________________________________________________________
Typical Application
V_DDQ = 1.2V
U1
MIC5163
V_CC = 5V
100µF 100µF
6.3V 6.3V
EN
1µF
10V
120pF
VDDQ
SUD50N02-06P
VCC HSD
EN
SUD50N02-06P
LSD
VREF _COMP
220pF
GND ^FB
V_TT = 0.6V
100µF
6.3V
100µF
6.3V
GND
MIC5163 as a DDR3 Memory Termination Device for 3.5A application
GND
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 2009
M9999-042209-A