MIC5162 Dual Regulator Controller for DDR3 GDDR3/4/5 Memory and High-Speed Bus Termination General Description Features The MIC5162 is a dual regulator controller designed for Input voltage range: 1.35V to 6V high speed bus termination. It offers a simple, low-cost Up to 7A V Current TT JEDEC compliant solution for terminating high-speed, low- Tracking programmable output voltage digital buses (i.e. DDR, DDR2, DDR3, SCSI, GTL, Wide bandwidth SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc). Logic controlled enable input The MIC5162 controls two external N-Channel MOSFETs Requires minimal external components to form two separate regulators. It operates by switching between either the high-side MOSFET or the low-side DDR, DDR2, DDR3, memory termination MOSFET depending upon whether the current is being -40C < T < +125C J sourced to the load or sunk by the regulator. JEDEC Compliant Bus Termination for SCSI, GTL, Designed to provide a universal solution for bus SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc termination regardless of input voltage, output voltage, or Tiny MSOP-10 package load current. The desired MIC5162 output voltage can be programmed by forcing the reference voltage externally to desired voltage. Applications The MIC5162 operates from an input of 1.35V to 6V, with Desktop Computers a second bias supply input required for operation. It is Notebook computers available in a tiny MSOP-10 package with operating Communication systems junction temperature range of -40C to +125C. Video cards Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. 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 +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5162 Ordering Information Part Number Temperature Range Package Lead Finish MIC5162YMM 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 10-Pin MSOP (MM) Pin Description Pin Number Pin Name Pin Function 1 VCC Bias Supply Input. Apply 3V-6V to this input for internal bias to the controller. 2 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. The enable pin can be tied directly to V or V for functionality. Do not float the DDQ CC enable pin. Floating this pin causes the enable to be in an undetermined state. 3 VDDQ Input Supply Voltage. 4 VREF Reference voltage equal to half of VDDQ. For internal use only. 5 GND Ground. 6 FB Feedback input to the internal error amplifier. 7 COMP Compensation (Output): Connect a capacitor and resistor from COMP pin 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. M9999-033110 March 2010 2