Texas Instruments LP2996MX/NOPB

Mfr. Part

LP2996MX/NOPB

Manufacturer

Texas Instruments (Luminary Micro/TI)

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Detailed Description

DDR memory termination regulator that sources and sinks current to create a stable VTT rail at one-half of VDDQ, with a buffered reference output for the controller. Wide input range 2.2 V to 5.5 V, ROHS3 compliant, surface-mount SOIC-8 package, operating temperature 0°C to 125°C. Designed for fast transient response on high-speed memory buses.

Key Features

DDR terminator regulator for VTT generation (tracks VDDQ/2)

Sink and source output current capability for bidirectional termination load

Buffered VREF output for the memory controller

Wide input supply range 2.2 V to 5.5 V

Fast transient response for dynamic bus activity

Stable operation with low-ESR capacitors

Enable/Shutdown control for power sequencing (device-dependent, see datasheet)

Thermal and fault protections typical of TI PMICs (see datasheet)

ROHS3 compliant, lead-free NOPB finish

Compact 8-SOIC package for easy SMT placement

Key Advantages

Simplifies DDR/DDR2/DDR3 VTT rail design with minimal external parts

Reliable tracking to VDDQ/2 improves signal integrity and memory stability

Bidirectional current handling maintains VTT under both source and sink conditions

Proven TI design with strong ecosystem and documentation

Broad input voltage range supports 3.3 V and 5 V systems

Small footprint and straightforward layout reduce PCB complexity and cost

Available in high volume for production (current stock 20,900 units at Y-IC)

Packaging

Type: 8-SOIC, surface-mount, tape & reel (TR) for automated assembly

Material: Molded plastic (epoxy) body, leadframe with matte-tin lead finish (NOPB, lead-free)

Size: Body width approx. 3.90 mm, length approx. 4.90 mm, height ~1.5 mm

Pin configuration: 8 leads at 1.27 mm pitch; typical pins include VIN, VDDQ sense, VTT output, VREF output, GND, EN/SHDN, and sense/feedback pins (refer to datasheet for exact mapping)

Thermal characteristics: SOIC-8 without exposed pad; thermal performance depends on PCB copper area, airflow, and load. Use generous copper pour on VTT and GND to improve heat dissipation.

Electrical properties: Input 2.2 V to 5.5 V, DDR terminator function, output VTT tracks VDDQ/2, buffered VREF for controller. Note: the “Current Supply 320A” shown in parameters is not plausible for this device and is almost certainly a data entry error; actual quiescent current is in the µA–mA range. Please confirm precise current specs in the datasheet.

Compliance: ROHS3 compliant

Supplier device package: 8-SOIC (0.154", 3.90 mm width)

Base product number: LP2996

Lifecycle

Status: Active and widely used for DDR termination in production designs

Not nearing discontinuation based on current industry availability

Equivalent or alternative models:

- Texas Instruments TPS51200 (DDR2/DDR3/DDR4 terminator, higher current capability)

- Texas Instruments LP2997 (similar family with higher sink/source current)

- Texas Instruments TPS51206 (low-power DDR termination variant)

- Texas Instruments TPS51100 (legacy DDR termination controller/regulator)

If you need pin-to-pin compatibility or a drop-in replacement recommendation for your exact board, contact our sales team via the Y-IC website for tailored alternatives and lifecycle updates.

Key Application Areas

VTT termination rail for DDR, DDR2, and DDR3 memory systems

Desktop and server motherboards

Industrial PCs and embedded controllers

Networking and telecom equipment

Graphics and high-speed digital subsystems

Consumer electronics requiring stable DDR termination

Datasheet

Y-IC hosts the most authoritative datasheet for LP2996MX/NOPB on our product page. We strongly recommend downloading the datasheet here to verify pinout, electrical limits, layout guidelines, and thermal design tips.

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