LP2995LQ National Semiconductor, LP2995LQ Datasheet
LP2995LQ
Specifications of LP2995LQ
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LP2995LQ Summary of contents
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... SENSE lation and a V output as a reference for the chipset and REF DDR DIMMS. Patents Pending Typical Application Circuit © 2011 National Semiconductor Corporation LP2995 Features ■ Low output voltage offset ■ Works with +5v, +3.3v and 2.5v rails ■ ...
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... EP Ordering Information Order Number Package Type LP2995M LP2995MX LP2995MR PSOP-8 LP2995MRX PSOP-8 LP2995LQ LP2995LQX www.national.com 20039320 20039350 Name NC No internal connection. Can be used for vias. GND Ground. VSENSE Feedback pin for regulating VTT. VREF Buffered internal reference voltage of VDDQ/2. VDDQ Input for internal reference equal to VDDQ/2 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. AVIN to GND PVIN to GND VDDQ (Note 2) Storage Temp. Range Junction Temperature PSOP-8 Thermal Resistance (θ Electrical Characteristics apply over the full Operating Temperature Range (T AVIN = PVIN = 2 ...
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Typical Performance Characteristics (25° (0, 25, 85, and 125° Temperature (No Load) REF www.national.com Iq vs Temperature ( V 20039309 20039311 OUT 20039313 4 = 2.5V) ...
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OUT Maximum Output Current (Sinking (VDDQ = 2.5) Maximum Output Current (Sourcing (VDDQ = 2.5) 20039315 IN 20039317 5 IN 20039316 www.national.com ...
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Block Diagram Description The LP2995 is a linear bus termination regulator designed to meet the JEDEC requirements of SSTL-2 and SSTL-3. The LP2995 is capable of sinking and sourcing current at the out- put V , regulating the voltage to ...
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Pin Descriptions AVIN AND PVIN AVIN and PVIN are the input supply pins for the LP2995. AVIN is used to supply all the internal control circuitry for the two op-amps and the output stage PVIN is used ...
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Thermal Dissipation Since the LP2995 is a linear regulator any current flow from V will result in internal power dissipation generating heat prevent damaging the part from exceeding the maximum allowable junction temperature, care should be taken to ...
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Typical Application Circuits The typical application circuit used for SSTL-2 termination schemes with DDR-SDRAM can be seen in For SSTL-3 and other applications it may be desirable to change internal reference voltage scaling from VDDQ * 0.5. An external resistor ...
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PCB Layout Considerations 1. AVIN and PVIN should be tied together for optimal performance. A local bypass capacitor should be placed as close as possible to the PVIN pin. 2. GND should be connected to a ground plane with multiple ...
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Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead Small Outline Package (M8) NS Package Number M08A 11 www.national.com ...
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LLP Package (LD) NS Package Number LQA16A 8-Lead PSOP Package (PSOP-8) NS Package Number MRA08A 12 ...
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Notes 13 www.national.com ...
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