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EV1320QI 2A PowerSoC
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, DDR4, QDR,
and low power DDR3/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%
• 40mm2 Total Solution Size
• No External Inductor Required
• JEDEC Compliant DDR2/3/4/QDR and Low
Power DDR3/4 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, DDR4,
Low Power DDR3, DDR4, and QDR Memories
Figure 1: Simplified Applications Circuit Figure 2: Highest Efficiency in Smallest Solution Size
– enpirion® power solutions
VTT
C1P
COUT
CIN
VOUT
AVIN
AGND
SS
VDDQ
ENABLE
PGND
PGND
C1N
15nF
CFLY
VDDQ
3.3V
VREF
DIVIDER
VREF
EV1320QI
10µF
80
82
84
86
88
90
92
94
96
98
00.2 0.4 0.6 0.8 11.2 1.4 1.6 1.8 2
EFFICIENCY (%)
OUTPUT CURRENT (A)
Efficiency vs. Output Current
VTT = 0. 9V
VTT = 0.75V
VTT = 0. 6V
CONDITIONS
AV
IN
= 3.0V
VDDQ = 2* VTT
06831 September 4, 2018 Rev E