NXP Semiconductors Document Number: MC34712 Rev. 8.0, 8/2016 Data Sheet: Technical Data 3.0 A 1.0 MHz fully integrated DDR 34712 switch-mode power supply The SMARTMOS 34712 is a highly integrated, space efficient, low cost, single synchronous buck switching regulator with integrated N-channel power MOSFETs. It is a high performance point-of-load (PoL) power supply with the SWITCH-MODE POWER SUPPLY ability to track an external reference voltage. Its high efficient 3.0 A sink and source capability combined with its voltage tracking/sequencing ability and tight output regulation, makes it ideal to provide the termination voltage (V ) for modern data buses such as Double-Data-Rate TT (DDR) memory buses, including but not limited to DDR, DDR2, DDR3, and DDR4 memories. It also provides a buffered output reference voltage (V ) to REF the memory chipset The 34712 offers the designer the flexibility of many control, supervisory, and protection functions to allow for easy implementation of complex designs. It is housed in a Pb-free, thermally enhanced, and space efficient 24 pin exposed pad QFN. Features 50 m integrated N-channel power MOSFETs EP SUFFIX Input voltage operating range from 3.0 V to 6.0 V 98ARL10577D 1% Accurate output voltage, ranging from 0.6 V to 1.35 V 24-PIN QFN 1% Accurate buffered reference output voltage Programmable switching frequency range from 200 kHz to 1.0 MHz with a default of 1.0 MHz Overcurrent limit and short-circuit protection Thermal shutdown Output overvoltage and undervoltage detection Active low power-good output signal Active low standby and shutdown inputs V IN 34712 (3.0 TO 6.0 V) PVIN BOOT TERMINATING V DDQ VREFIN RESISTORS V TT SW VOUT VIN MEMORY V VDDI INV DDQ BUS DDR MEMORY FREQ COMP CHIPSET V DDQ GND VREFOUT V REF V IN DDR MEMORY SD PGND CONTROLLER MCU STBY PG Figure 1. 34712 simplified application diagram 2016 NXP B.V.1 Orderable parts Table 1. Orderable part variations Part Number Temperature (T ) Package A (1) MC34712EP -40 C to 85 C 24 QFN Notes 1. To order parts in Tape & Reel, add the R2 suffix to the part number. 34712 2 NXP Semiconductors