EV1320QI
2A Source/Sink DDR Memory
Termination Converter
Description
The EV1320QI is a DC to DC converter specifically
designed for memory termination applications. The
device offers high efficiency, up to 96%, while
providing a solution footprint similar to that of a linear
termination device.
The EV1320QI comes in a 3mm x 3mm x 0.55mm
QFN 16-pin package and requires only a small
number of external MLCC capacitors. The device is
designed to operate directly from the VDDQ supply
rail. No external divider or reference is required. The
EV1320QI provides a very stable output voltage
(VTT) which tracks VDDQ while sinking and sourcing
up to 2A of continuous output current. Up to 4
EV1320QI devices can be paralleled to source up to
8A of current. An ENABLE pin with output discharge
is available for S3 (suspend to RAM) states.
EV1320QI is specifically designed to meet the precise
voltage, fast transient requirements of present and
future high-performance, DDR2, DDR3, and low
power DDR4 JEDEC VTT requirements. Advanced
circuit techniques and high switching frequency
deliver high-quality, compact, non-isolated DC-DC
conversion.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
High Efficiency, Up to 96%
40mm
2
Total Solution Size
No External Inductor Required
JEDEC Compliant DDR2/3/QDR and Low Power
DDR 4 Solution
Enable Pin with Output Discharge to Support S3
(Suspend to RAM) Mode
Operates Directly from VDDQ
VOUT (VTT) Voltage Tracks VDDQ/2 ± 40mV
Source and Sink Up to 2A Continuous Current
Parallel Up to 4 Devices for 8A VTT Current
Programmable Soft Start/Soft Shutdown
Cost Effective Integrated Solution
Thermal Overload, Over Current, Short Circuit,
and Under-Voltage Protection
RoHS Compliant, MSL level 3, 260C Reflow
Applications
•
VTT Bus Termination for DDR2, DDR3, Low
Power DDR4, and QDR Memories
Efficiency vs. Output Current
98
96
94
EFFICIENCY (%)
92
90
88
86
84
82
80
0
0.2
0.4
0.6 0.8 1 1.2 1.4
OUTPUT CURRENT (A)
1.6
1.8
2
VTT = 0.9V
VTT = 0.75V
VTT = 0.6V
CONDITIONS
AV
IN
= 3.0V
VDDQ = 2* VTT
Figure 1.
Simplified Applications Circuit
Figure 2.
Highest Efficiency in Smallest Solution Size
www.enpirion.com
06831
April 9, 2012
Rev:
C
ENPIRION [ ENPIRION, INC. ]
