Техническая Спецификация для Texas Instruments 2-A Peak Sink/Source DDR Termination Regulator With VTTREF Buffered Reference TPS51206EVM-745 TPS51206EVM-745
Модели
TPS51206EVM-745
Description
1
Description
The TPS51206EVM-745 is designed to provide proper termination voltage and a 10-mA buffered
reference voltage for DDR memory which covers DDR2 (0.9VTT), DDR3 (0.75VTT), DDR3L (0.675VTT)
and DDR4 (0.6VTT) specifications with minimal external components.
reference voltage for DDR memory which covers DDR2 (0.9VTT), DDR3 (0.75VTT), DDR3L (0.675VTT)
and DDR4 (0.6VTT) specifications with minimal external components.
1.1
Typical Applications
•
DDR2/DDR3/DDR3L/DDR4 memory power supplies
•
SSTL_18, SSTL_15, SSTL_135, and HSTL termination
1.2
Features
•
VDD voltage: support 5-V rail and 3.3-V rail
•
VLDOIN, VDDQ voltage range: 1.2 V
–
1.8 V
•
Build-in, onboard transient load (with both sinking and sourcing capability) to emulate the sink/source
transient behavior which helps to evaluate the dynamic performance. For ease of use, both load step
and timing of transient can be modified by onboard resistors.
transient behavior which helps to evaluate the dynamic performance. For ease of use, both load step
and timing of transient can be modified by onboard resistors.
–
DDR2 (0.9VTT):
±
1.8-A sink/source transient load
–
DDR3 (0.75VTT):
±
1.5-A sink/source transient load
–
DDR3L (0.675VTT):
±
1.35-A sink/source transient load
–
DDR4 (0.6VTT):
±
1.2-A sink/source transient load
•
Switch S1, S2 for S3 and S5 Enable function
•
Convenient test points for probing VTT, VTTREF, CLK_IN and loop response testing
•
Four-layer, printed-circuit board (PCB) with all the components on the bottom side
2
Electrical Performance Specifications
Table 1. TPS51206EVM-745 Electrical Performance Specifications
(1)
Parameter
Test Conditions
Min
Typ
Max
Units
Input Characteristics
VDD voltage range
5/3.3
V
VDDQ voltage range
1.2
1.8
V
VLDOIN voltage range
VTT+0.4
3.5
V
VTT and VTTREF Termination Voltage
DDR2 (0.9VTT)
VTT
0.9
V
VTTREF
0.9
DDR3 (0.75VTT)
VTT
0.75
V
VTTREF
0.75
V
DDR3L (0.675VTT)
VTT
0.675
V
VTTREF
0.675
V
VTT
0.6
V
DDR4 (0.6VTT)
VTTREF
0.6
V
VTT and VTTREF Termination Current
For DDR2(0.9VTT) and DDR3(0.75VTT)
-2
2
A
VTT termination current(I
VTT
)
For DDR3L(0.675VTT) and DDR4(0.6VTT)
–
1.5
1.5
VTTREF termination current(IV
TTREF
)
–
10
10
mA
VTT Current Limit
VTT sink current limit
2
A
VTT source current limit
2
A
(1)
Note: Jumpers set to default locations, See
of this user
’
s guide
3
SLUU515
–
August 2011
Using the TPS51206EVM-745, 2-A Peak Sink/Source DDR Termination
Regulator With VTTREF Buffered Reference for DDR2, DDR3, DDR3L, and
DDR4
Copyright
©
2011, Texas Instruments Incorporated