EV1320QI Datasheet, PDF (1/20 Pages) Enpirion, Inc. – The EV1320QI is a DC to DC converter specifically designed for memory termination applications.

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%
• 40mm² 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
06831
Figure 1. Simplified Applications Circuit
Efficiency vs. Output Current
98
96
94
92
90
88
86
VTT = 0.9V
84
VTT = 0.75V CONDITIONS
82
VTT = 0.6V
AV_IN = 3.0V
VDDQ = 2* VTT
80
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
OUTPUT CURRENT (A)
Figure 2. Highest Efficiency in Smallest Solution Size
April 9, 2012
www.enpirion.com
Rev: C