LP2995M National Semiconductor, LP2995M Datasheet - Page 9

• Manufacturer Part Number: LP2995M
• Description: Linear Voltage Regulator IC
• Manufacturer: National Semiconductor

Specifications of LP2995M

• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Current Rating: 1.5A
• Output Voltage Max: 1.26V
• Supply Voltage Max: 5V
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Application Circuits
The typical application circuit used for SSTL-2 termination
schemes with DDR-SDRAM can be seen in Figure 5.
For SSTL-3 and other applications it may be desirable to
change internal reference voltage scaling from VDDQ * 0.5.
An external resistor in series with the VDDQ pin can be used
to lower the reference voltage. Internally two 50 kΩ resistors
Another application that is sometimes required is to increase
the V
This can be accomplished independently of V
TT
output voltage from the scaling factor of VDDQ * 0.5.
FIGURE 5. SSTL-2 Implementation
FIGURE 6. SSTL-3 Implementation
REF
by using a
FIGURE 7.
9
set the output V
a 11.1 kΩ external resistor will change the internal reference
voltage causing the two outputs to track VDDQ * 0.45. An
implementation of this circuit can be seen in Figure 6.
resistor divider network between V
An example of this circuit can be seen in Figure 7.
TT
to be equal to VDDQ * 0.5. The addition of
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TT
, V
SENSE
and Ground.
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