MIC5163YMM Microchip

MIC5163 Dual Regulator Controller for DDR3 GDDR3/4/5 Memory Termination General Description Features The MIC5163 is a dual regulator controller designed 0.75V to 6V input supply voltage specifically for low voltage memory termination Memory termination for: DDR3, GDDR3/4/5 applications such as DDR3 and GDDR3/4/5. The MIC5163 Tracking programmable output offers a simple, low cost JEDEC compliant solution for Logic controlled enable input terminating high-speed, low-voltage digital buses. Wide bandwidth The MIC5163 controls two external N-Channel MOSFETs to form two separate regulators. It operates by switching Minimal external components required between either the high-side MOSFET or the low-side Tiny MSOP-10 package MOSFET, depending on whether the current is being 40C < T < +125C J sourced to the load or being sinked by the regulator. Designed to provide a universal solution for memory Applications termination regardless of input voltage, output voltage, or load current the desired MIC5163 output voltage can be Desktop Computers externally programmed by forcing the reference voltage. Servers The MIC5163 operates from an input voltage as low as Notebook computers 0.75V up to 6V, with a second bias supply input required Workstations for operation. The MIC5163 is available in a tiny MSOP-10 package with an operating junction temperature range of 40C to +125C. Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Typical Application U1 V = 1.2V DDQ MIC5163 VDDQ V = 5V CC SUD50N02-06P V = 0.6V TT VCC HSD 100F 100F EN EN SUD50N02-06P 6.3V 6.3V LSD VREF COMP 1F 100F 100F 10V 220pF 6.3V 6.3V 120pF FB GND GND GND MIC5163 as a DDR3 Memory Termination Device for 3.5A application Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5163 Ordering Information Part Number Temperature Range Package Lead Finish MIC5163YMM 40 to +125C 10-Pin MSOP Pb-Free Note: MSOP is a Green RoHs compliant package. Lead finish is NiPdAu. Mold compound is halogen free. Pin Configuration VCC 1 10 NC EN 2 9 HD VDDQ 3 8 LD VREF 4 7 COMP GND 5 6 FB 10-Pin MSOP (MM) Pin Description Pin Number Pin Name Pin Function 1 VCC Bias Supply (Input): Apply a voltage between +3V and +6V to this input for internal bias to the controller 2 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown 3 VDDQ Input Supply Voltage 4 VREF Reference output equal to half of VDDQ 5 GND Ground 6 FB Feedback input to the internal error amplifier 7 COMP Compensation (Output): Connect a capacitor to feedback pin for compensation of the internal control loop 8 LD Low-side drive: Connects to the Gate of the external low-side MOSFET 9 HD High-side drive: Connects to the Gate of the external high-side MOSFET 10 NC Not internally connected M9999-042209-A April 2009 2