EV1380
8A Synchronous Highly Integrated DC-DC
DDR2/3/QDR
TM
Memory Termination
Power SoC
Description
The EV1380 is a Power System on a Chip
(PowerSoC) DC to DC converter in a 68 pin QFN
that is optimized for DDR2, DDR3, and QDR
TM
VTT applications. It requires a power supply
(AVIN) for the controller and operates from an
input supply (VDDQ). It provides a tightly
regulated and very stable output voltage (VTT)
which tracks VDDQ while sinking and sourcing
up to 8A of output current. Enpirion’s integrated
inductor technology significantly helps to reduce
noise, and offers a high efficiency solution for
VTT applications with a very low external
component count.
Advanced circuit techniques, optimized switching
frequency, and very advanced, high-density,
integrated circuit and proprietary inductor
technology deliver high-quality, ultra compact,
non-isolated DC-DC conversion.
The complete power converter solution enhances
productivity by offering greatly simplified board
design, layout and manufacturing requirements.
R1 0402
RFS 0402
RA 0402
CA 0402
RB 0402
Features
•
•
•
•
•
•
•
High efficiency, up to 94%.
Output voltage tracks VDDQ +/- 1%
Nominal 1.5MHz operating frequency with
ability to synchronize to an external clock
source or serve as the primary source.
Programmable soft-start time. Soft Shutdown.
Master/slave configuration for parallel
operation.
Thermal shutdown, over current, short circuit,
and under-voltage protection.
RoHS compliant, MSL level 3, 260C reflow.
Application
•
Bus Termination: DDR2, DDR3, & QDR™
memory
SCHOTTKY
V
DDQ
C
IN
V
CNTRL
SW
VDDQ
VOUT
V
TT
R
1
C
A
R
A
R
PD
C
OUT
R
C
EV1380
ENABLE
AVIN
PGND
VREF
VFB
PGND
AGND
FQADJ
R
D
C
SS
R
B
C
AVIN
R
FS
EV1380QI
Figure 2: Typical Application Schematic (V
DDQ
is the
memory core voltage; V
TT
is memory termination
voltage that tracks V
DDQ
)
Output Cap
100uF/ 1206
Output Cap
100uF/ 1206
Output Cap
100uF/ 1206
Input Cap
47uF/ 0805
Input Cap
47uF/ 0805
Figure 1: EV1380 Total Solution Size ~200mm
2
(not to
scale). Does not show back-side components.
www.enpirion.com
ENPIRION [ ENPIRION, INC. ]
