LP2996MR/NOPB National Semiconductor, LP2996MR/NOPB Datasheet - Page 12

• Manufacturer Part Number: LP2996MR/NOPB
• Description: IC DDR TERMINATION REG 8PSOP
• Manufacturer: National Semiconductor

Specifications of LP2996MR/NOPB

• Applications: Converter, DDR
• Voltage - Input: 2.2 ~ 5.5 V
• Number Of Outputs: 1
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-PSOP
• Polarity: Positive
• Input Voltage Max: 5.5 V
• Output Voltage: 1.159 V, 1.259 V, 1.359 V
• Output Type: Fixed
• Output Current: 1.5 A
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Reference Voltage: 1.358 V
• For Use With: LP2996MREVAL - BOARD EVALUATION LP2996MR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details
• Other names: *LP2996MR; *LP2996MR/NOPB; LP2996MR

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DDR-II APPLICATIONS
With the separate VDDQ pin and an internal resistor divider
it is possible to use the LP2996 in applications utilizing DDR-
II memory.
tions of recommended circuits with output curves displayed
in the Typical Performance Characteristics.
If it is not desirable to use the 1.8V rail it is possible to connect
the output stage to a 3.3V rail. Care should be taken to not
exceed the maximum junction temperature as the thermal
dissipation increases with lower V
Figure 6
and
Figure 7
FIGURE 7. SSTL-2 Implementation with higher voltage rails
TT
show several implementa-
FIGURE 9. DDR-II Termination with higher voltage rails
output voltages. For this
FIGURE 8. Recommended DDR-II Termination
Figure 6
shows
12
the recommended circuit configuration for DDR-II applica-
tions. The output stage is connected to the 1.8V rail and the
AVIN pin can be connected to either a 3.3V or 5V rail. For new
designs, the LP2997 or LP2998 is recommended for DDR-II
applications.
reason it is not recommended to power PVIN off a rail higher
than the nominal 3.3V. The advantage of this configuration is
that it has the ability to source and sink a higher maximum
continuous current.
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