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Voltage Regulators for SOCAMM2 Memory Modules
Voltage Regulators for LPDDR5X-based SOCAMM2 enable a broad range of performance and capacity configurations for AI servers
| Description | Part Number | Product Brief | Applications |
|---|---|---|---|
| 12 Amp Voltage Regulator | P2815Gxx |  |
Server SOCAMM2 |
| 3 Amp Voltage Regulator | P2813Gxx | |
Server SOCAMM2 |
| SPD Hub with Internal Temperature Sensor | SPD1605Gxx | |
Server SOCAMM2, RDIMM, MRDIMM |
How the Voltage Regulators for SOCAMM2 Work
The Rambus 12A and 3A Voltage Regulators are synchronous step-down DC-DC converters for server SOCAMM2 memory modules. In order to reliably deliver high performance within the desired power envelope, LPDDR5X-based SOCAMM2 utilizes these on-module voltage regulators to convert the input supply voltage to the lower voltages needed by the active components on the module.
The Rambus 12A Voltage Regulator (P2815Gxx) integrates a low on-resistance power MOSFET to achieve high-efficiency delivery of up to 12A output current. It adopts Constant ON Time control architecture to provide fast transient and seamless mode transition for high power efficiency in light load. The device features cycle-by-cycle current limit protection by sensing FETs current. It prevents the device from catastrophic damage in output short circuit situations. Soft-start function is built in the device to prevent inrush current during start-up. The device includes a full range of under-voltage and over-voltage protection features.
12A Voltage Regulator Features
- Input Voltage Range from 7V to 5.5V
- Internal reference voltage with 1% accuracy
- Selectable switching frequency (600kHz, 800kHz, 1MHz,2MHz)
- Differential remote sense
- Operational from -40°C to +125°C
- Programmable valley current limit through external resistor
- Seamless mode transition for light loads
- Programmable soft start time
- Enable control input
- Power good indicator
- Protection with UVLO, OVP, UVP, cycle by cycle CLP and OTP
- Out-of-bounds output over-voltage prevention
3A Voltage Regulator Features
- Input Voltage Range from 5V to 5.5V
- Integrated 100mΩ and 60mΩ FETs
- Internal reference voltage with 1% accuracy
- 750kHz switching frequency
- Seamless mode transition for light loads
- Operational from -40°C to +125°C
- Internal soft startup (1msec)
- Enable control input
- Power good indicator
- Protection with UVLO, OVP, UVP, cycle by cycle CLP and OTP
- Out-of-bounds output over-voltage prevention
Ask the Experts: SOCAMM2 Server Chipset
In this episode of Ask the Experts, we discuss the server module chipset for SOCAMM2 with Piero Bianco, Senior Director of Product Marketing, Memory Interface Chips at Rambus. Topics include: the benefits and challenges of using LPDDR memory in servers; and how the SOCAMM2 module bridges the gap between LPDDR limits and the performance and reliability needs of servers.
