The LP2996-N and LP2996A linear regulators are designed to meet the JEDEC SSTL-2 specifications for termination of DDR-SDRAM. The device also supports DDR2, while LP2996A supports DDR3 and DDR3L VTT bus termination with VDDQ minimum of 1.35 V. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 1.5-A continuous current and transient peaks up to 3 A in the application as required for DDR-SDRAM termination. The LP2996-N and LP2996A also incorporate a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DIMMs.
TI recommends the LP2998 and LP2998-Q1 devices for automotive applications and DDR applications that require operating at temperatures below zero.
WEBENCH® design tools can be used by application designers to generate, optimize, and simlulate applications using the LP2998 and LP2998-Q1.
• Minimum VDDQ:
– 1.8 V (LP2996-N)
– 1.35 V (LP2996A)
• Source and Sink Current
• Low Output Voltage Offset
• No External Resistors Required for Setting Output
• Linear Topology
• Suspend to Ram (STR) Functionality
• Stable With Ceramic Capacitors With Appropriate
• Low External Component Count
• Thermal Shutdown
• LP2996-N: DDR1 and DDR2 Termination Voltage
• LP2996A: DDR1, DDR2, DDR3, and DDR3L
• Industrial and Medical PC
• SSTL-2 and SSTL-3 Termination
• HSTL Termination
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