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Renesas RRM12120-B40
- Part No.:
- RRM12120-B40
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
RRM12120-B40.pdf
- Description:
- 20A, DC/DC PMBUS STEP DOWN POWER
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Inventory:130
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Product details
Overview
RRM12120-B40 from Renesas Electronics is a fully PMBus-enabled, 20A single-channel digital DC/DC step-down power module in a thermally enhanced 10mm×13mm×5.9mm BGA (POP) package. It operates from 4.75V–15V input, delivers adjustable output from 0.45V to 3.3V with ±0.7% accuracy, achieves up to 94% efficiency, and supports fixed switching frequencies up to 1.25MHz - optimized for high-density point-of-load regulation in FPGA, ASIC, and server CPU core rails.
For engineers reviewing the RRM12120-B40 datasheet, RRM12120-B40 pinout, RRM12120-B40 application, or RRM12120-B40 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for digital POL implementation requiring PMBus telemetry, fast transient response, and NVM-stored configurations.
Technical Context
The RRM12120-B40 implements Renesas' proprietary digital synthetic current modulation scheme with dual-edge control and optional diode braking, enabling industry-leading transient response across full load range without external compensation. Its architecture integrates lossless input/output current sensing, on-die temperature monitoring, and real-time telemetry for VIN, VOUT, IOUT, temperature, duty cycle, and fSW.
It features a dedicated PMBus v1.3 interface supporting up to 16 user-configurable profiles stored in non-volatile memory, programmable over/under-voltage/current/temperature protection with latch-off or auto-restart behavior, and black-box fault recording with first-fault indicator - all managed via PowerNavigator™ software.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 20A continuous - supports high-current core rails for modern FPGAs and multi-core processors without external current sharing. |
| Input Voltage Range | 4.75V to 15V - compatible with standard 5V, 12V, and intermediate bus architectures in servers and telecom equipment. |
| Output Voltage Range | 0.45V to 3.3V - covers sub-1V CPU cores, 1.2V I/O, and 3.3V auxiliary rails with ±0.7% regulation accuracy over line/load/temp. |
| Switching Frequency | Up to 1.25MHz fixed - enables compact magnetics and high-frequency filtering while maintaining >94% peak efficiency at 12VIN/0.6VOUT. |
| Efficiency | Up to 94% - achieved via integrated high-efficiency power stage, low-RDS(on) MOSFETs, and optimized gate drive timing. |
| PMBus Compliance | PMBus v1.3 - supports full telemetry, sequencing, margining, fault logging, and 16 NVM configurations for production-ready digital power management. |
| Package | 10mm × 13mm × 5.9mm BGA (POP) - thermally enhanced for high-power density; requires controlled-impedance PCB layout per Renesas AN-947. |
Pinout & Package
RRM12120-B40 uses a 10mm×13mm×5.9mm thermally enhanced BGA (POP) package with 105 solder balls arranged in a 13×8 grid (excluding corner voids). Thermal pad on underside requires direct connection to internal ground plane for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A1–A4, B1–B3, C2, H1, J1–J2, K1–K6, J4–J6) | Power Output Terminal | Primary regulated output node; multiple parallel pads reduce IR drop and improve current sharing in high-current PCB layouts. |
| VIN (A6–A9, B6–B10, C6–C10, D8–D10, E9–E10) | Input Power Supply | High-current input rail connection; requires low-ESR ceramic capacitors placed directly adjacent to minimize loop inductance. |
| SW (A10–A11, D13, E13, F13, G13, H13, J11–J13, K8–K13) | Switch Node | Connection to internal high-side/low-side MOSFET junction; critical for EMI control and must be routed with minimal area and length. |
| PGND (A12–A13, B11–B13, C11–C13, D11–D12, E11–E12, F9–F12, G9–G12, H10–H12, J10) | Power Ground Return | Low-impedance return path for output inductor and internal low-side FET; must be tied to solid thermal ground plane. |
| PMSCL / PMSDA | PMBus Clock / Data | Standard SMBus-compatible interface pins; require 10kΩ pull-up to 3.3V and proper slew-rate control for reliable communication up to 400kHz. |
| EN / nPMALERT / nVRHOT | Enable / Fault Alert / Over-Temp Flag | Active-low digital control/status signals; EN enables soft-start sequence, nPMALERT indicates PMBus alert condition, nVRHOT asserts at Tj ≥ 125°C. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Synthetic Current Modulation | Enables <1µs transient response to 50% load steps without external compensation components or tuning effort. |
| Lossless Input/Output Current Sensing | Eliminates sense resistors and associated power loss; supports accurate real-time IIN/IOUT telemetry and OCP with ±3% accuracy. |
| 16-Profile NVM Storage | Allows field-updatable configurations (voltage, margins, sequencing, protection thresholds) without reprogramming during system boot. |
| Black Box Fault Recorder | Logs last 16 fault events with timestamp, status word, and root-cause flags - critical for failure analysis in deployed systems. |
| Diode Braking Mode | Reduces output voltage undershoot during fast load transients by actively sinking current through low-side FET during off-time. |
| Programmable VOUT Transition Rate | Configurable slew rate (0.1–10 mV/µs) prevents overshoot during power-up/down and enables precise margining sequences. |
Applications
| Server CPU Core Rail | Telecom Baseband Processor |
|---|---|
|
Use Scenario: Regulating 0.8V/15A core supply for dual-socket x86 server CPUs under dynamic DVFS load profiles. IC Role / Device Role / Timing Role: Primary point-of-load regulator with PMBus-controlled voltage scaling synchronized to CPU P-states. Use Value: ±0.7% output accuracy and <1µs transient response maintain stable operation during rapid frequency/voltage transitions. |
Use Scenario: Delivering 1.2V/18A to 5G baseband SoCs with bursty packet-processing workloads. IC Role / Device Role / Timing Role: High-efficiency digital POL supplying core logic and memory interfaces with real-time thermal derating. Use Value: Integrated temperature sensing and programmable OT protection prevent thermal throttling without external sensors. |
| FPGA I/O Bank Supply | Industrial PLC Main Logic Rail |
|
Use Scenario: Providing 3.3V/20A to FPGA I/O banks requiring tight voltage tolerance and glitch-free hot-swap capability. IC Role / Device Role / Timing Role: Digitally configurable, sequenced, and monitored supply with programmable UV/OV fault responses. Use Value: 16 NVM profiles enable one hardware design to support multiple FPGA families via firmware update. |
Use Scenario: Powering ARM-based PLC controllers in harsh environments with wide input voltage variation (8–15V). IC Role / Device Role / Timing Role: Robust, digitally managed POL with black-box fault logging for predictive maintenance in industrial automation. Use Value: First-fault indication and detailed telemetry (VIN, VOUT, IOUT, temp) simplify field diagnostics and reduce MTTR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital PMBus step-down power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS546D24A | 20A, 4.5–18VIN, 0.5–3.3VOUT, PMBus 1.3, 93% max efficiency, 10mm×12.5mm QFN | Requires external current-sense resistor; lacks black-box recorder and diode braking mode | Preferred where QFN thermal performance suffices and NVM profile count is secondary |
| Analog Devices LTM4700 | 20A, 3.1–20VIN, 0.5–5.5VOUT, PMBus 1.2, 92% max efficiency, 16mm×16mm BGA | Larger footprint; lower PMBus revision; no dual-edge modulation or programmable transition rate | Selected when wider input range or higher output voltage flexibility outweighs size and feature trade-offs |
Compared with TPS546D24A and LTM4700, the RRM12120-B40 delivers superior transient response via dual-edge modulation, tighter regulation accuracy, and more comprehensive fault diagnostics - making it optimal for space-constrained, high-reliability digital POL deployments requiring field-updatable configurations and deterministic fault recovery.
Availability
RRM12120-B40 is available at Aetrix Electronics and suitable for server, telecommunications infrastructure, and industrial embedded applications requiring stable component supply, long-term lifecycle support, and traceable sourcing of high-performance digital power modules.
Supply support for RRM12120-B40 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and datacenter markets.
The RRM12120-B40 belongs to Renesas' RRM family of digital power modules, designed specifically for high-current, high-efficiency point-of-load regulation in next-generation computing and networking equipment with stringent PMBus telemetry and reliability requirements.
FAQ
What is the maximum supported switching frequency of the RRM12120-B40?
The RRM12120-B40 supports a fixed switching frequency up to 1.25MHz, configurable via PMBus command FREQUENCY_SWITCH (33h). This high-frequency operation allows use of smaller external inductors and capacitors while maintaining >94% efficiency at typical loads - critical for high-density board layouts in servers and telecom systems.
Does the RRM12120-B40 require external current-sense resistors?
No, the RRM12120-B40 implements lossless input and output current sensing using internal MOSFET RDS(on) monitoring, eliminating external sense resistors and associated power loss. This enables accurate real-time IIN/IOUT telemetry and overcurrent protection with ±3% accuracy - verified in the RRM12120-B40 datasheet Section 6.2 and 6.8.
How many PMBus configurations can be stored in the RRM12120-B40's NVM?
The RRM12120-B40 stores up to 16 user-defined configurations in on-chip non-volatile memory (NVM), including output voltage, margins, sequencing order, fault thresholds, and protection responses. These profiles can be selected dynamically via PMBus PAGE command, enabling flexible deployment across multiple FPGA or ASIC platforms using a single RRM12120-B40 hardware design.
What thermal protection features does the RRM12120-B40 provide?
The RRM12120-B40 includes programmable overtemperature (OT) and overtemperature warning (OT_WARN) thresholds, with independent fault response modes (latch-off or auto-restart). It also provides nVRHOT pin assertion at Tj ≥ 125°C and monitors die temperature via on-die sensor - all documented in Sections 7.5 and 11.31–11.33 of the RRM12120-B40 datasheet.
Is the RRM12120-B40 pin-compatible with other Renesas RRM modules?
No, the RRM12120-B40 has a unique 105-ball BGA (POP) footprint and pinout optimized for its 20A capability and thermal performance. It is not pin-compatible with RRM12090 or RRM12060 variants - each requires dedicated PCB layout per Renesas Package Outline Drawing (Page 102, R16DS0304EU0102 Rev.1.02).
RRM12120-B40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RRM12120-B40 FAQ
1.How can I place an order for RRM12120-B40 through Aetrix?
Please submit a Request for Quotation (RFQ) for RRM12120-B40 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RRM12120-B40 reliable?
The price and inventory of RRM12120-B40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RRM12120-B40 is usually 5 days.
3.What payment methods are accepted for RRM12120-B40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RRM12120-B40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RRM12120-B40?
RRM12120-B40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RRM12120-B40 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RRM12120-B40?
For technical support, including RRM12120-B40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RRM12120-B40 requirements.
6.How does Aetrix verify that RRM12120-B40 is sourced from the original manufacturer or authorized distributors?
All RRM12120-B40 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RRM12120-B40 meets industry standards.
7.What is the process for return or replacement of RRM12120-B40?
All RRM12120-B40 units undergo pre-shipment inspection (PSI). If there is an issue with RRM12120-B40, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RRM12120-B40 part is unused and in its original packaging.
Return procedure for RRM12120-B40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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