Document Number: MC34716
NXP Semiconductors
Rev. 8.0, 4/2016
Data sheet: Technical Data
1.0 MHz dual switch-mode DDR
34716
power supply
The 34716 is a highly integrated, space-efficient, low cost, dual synchronous
buck switching regulator with integrated N-channel power MOSFETs. It is a
high performance point-of-load (PoL) power supply with its second output
DUAL SWITCH-MODE DDR POWER
having the ability to track an external reference voltage. it provides a full power
SUPPLY
supply solution for Double-Data-Rate (DDR) Memories.
Channel one provides a source only, 5.0 A drive capability, while channel two
can sink and source up to 3.0 A. With its high current drive capability, channel
one can be used to supply the VDDQ to the memory chipset. The second
channels ability to track a reference voltage provides an ideal means of
supporting the termination voltage (VTT) required by modern data buses such
as Double-Data-Rate (DDR) memory buses, including, but not limited to DDR,
DDR2, DDR3 and Low power DDR3/DDR4 memories. Both channels are
highly efficient with tight output regulation. The 34716 also provides a buffered
output reference voltage (VREFOUT) to the memory chipset.
The 34716 SMARTMOS device offers a variety of control, supervisory and
protection functions that simplify the implementation of complex designs. It is
housed in a Pb-free, thermally enhanced and space efficient 26-pin exposed
EP SUFFIX
98ASA00702D
pad QFN.
26-PIN QFN
Features
50 m integrated N-channel power MOSFETs
Input voltage operating range from 3.0 to 6.0 V
1% accurate output voltages, ranging from 0.6 to 3.6 V
The second output tracks 1/2 an external reference voltage
1% accurate buffered reference output voltage
Programmable switching frequency range from 200 kHz to 1.0 MHz
Programmable soft start timing for channel one
Over-current limit and short-circuit protection on both channels
Thermal shutdown
Output over-voltage and under-voltage detection
Active low power good output signal
Active low standby and shutdown inputs
.
34716
3.0 V to 6.0 V V
IN
PVIN2
VIN
V
DDQ
VREFIN
PVIN1
BOOT1 BOOT2
V
DDQ
SW2 V
SW1 TT
VOUT2
VOUT1
Termination
Resistors
VDDQ
INV2
INV1
DDR Memory
DDR Memory
Memory Bus
COMP1 COMP2
Chipset
Controller
PGND1
VREFOUT
V
V REF
VDDI PGND2 IN
FREQ
PG
MCU
STBY
ILIM1
GND
SD
Figure 1. Simplified application diagram
2016 NXP B.V.1 Orderable parts
Table 1. Orderable part variations
Part number Notes Temperature (T ) Package
A
(1)
MC34716EP
-40 C to 85 C 26 pin QFN
Notes
1. To order parts in Tape & Reel, add the R2 suffix to the part number.
34716
2 NXP Semiconductors