Overview
The LP2996AMRX/NOPB, part of the LP2996A series, is a linear bus termination regulator designed by Texas Instruments. This device is specifically engineered to meet the JEDEC SSTL-2 specifications for the termination of DDR-SDRAM memory. It supports various DDR memory types, including DDR1, DDR2, DDR3, and DDR3L. The LP2996A is notable for its ability to handle high-speed data transmission with excellent signal integrity, making it a crucial component in systems requiring reliable memory bus termination.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| AVIN to GND | -0.3 | - | 6 | V |
| PVIN to GND | -0.3 | - | AVIN | V |
| Input Voltage (VDDQ) | -0.3 | - | 6 | V |
| Junction Temperature (TJ) | - | - | 150 | °C |
| Storage Temperature (Tstg) | -65 | - | 150 | °C |
| Recommended AVIN to GND | 2.2 | - | 5.5 | V |
| Continuous Output Current | - | 1.5 | - | A |
| Transient Peak Current | - | - | 3 | A |
| VREF Voltage (DDR I) | 1.135 | - | - | V |
Key Features
- Source and Sink Current Capability
- Low Output Voltage Offset
- No External Resistors Required for Setting Output Voltage
- Linear Topology
- Suspend to RAM (STR) Functionality
- Stable with Ceramic Capacitors
- Low External Component Count
- Thermal Shutdown Protection
- High-Speed Operational Amplifier for Excellent Load Transient Response
- VSENSE Pin for Superior Load Regulation and VREF Output
Applications
- DDR1, DDR2, DDR3, and DDR3L Termination Voltage
- FPGA Systems
- Industrial and Medical PCs
- SSTL-2 and SSTL-3 Termination
- HSTL Termination
Q & A
- What is the primary function of the LP2996AMRX/NOPB?
The primary function of the LP2996AMRX/NOPB is to provide a termination voltage for DDR-SDRAM memory, adhering to JEDEC SSTL-2 specifications.
- Which DDR memory types does the LP2996A support?
The LP2996A supports DDR1, DDR2, DDR3, and DDR3L memory types.
- What is the maximum continuous output current of the LP2996A?
The maximum continuous output current of the LP2996A is 1.5 A, with transient peaks up to 3 A.
- Does the LP2996A require external resistors for setting the output voltage?
No, the LP2996A does not require external resistors for setting the output voltage.
- What is the purpose of the VSENSE pin on the LP2996A?
The VSENSE pin provides superior load regulation and a VREF output as a reference for the chipset and DIMMs.
- How does the shutdown (SD) pin function on the LP2996A?
The shutdown (SD) pin provides Suspend To RAM (STR) functionality. When pulled low, the VTT output tri-states, providing a high impedance output, while VREF remains active.
- What is the thermal shutdown protection feature of the LP2996A?
The LP2996A features thermal shutdown protection to prevent overheating and ensure reliable operation.
- Can the LP2996A be used in FPGA systems?
- What types of capacitors are recommended for use with the LP2996A?
The LP2996A is stable with ceramic capacitors having appropriate ESR.
- What is the recommended operating temperature range for the LP2996A?
The recommended operating temperature range for the LP2996A is from 0°C to 125°C.
