MP2953 - Digital Multi-Phase VR12.5 PMBus Controller | MPS
MPN: MP2953 ✓ نشطMP2953 نظرة عامة
A digital multi-phase controller is a power-management IC that drives multiple buck phases in parallel to deliver high currents to a processor or ASIC while maintaining tight voltage regulation. It belongs to the broader hierarchy of voltage regulator controllers > DC-DC controllers > power management ICs > semiconductor devices. By interleaving phase currents, multi-phase controllers reduce input/output ripple, spread thermal dissipation across multiple DrMOS stages, and achieve fast transient response without the bulk capacitance required by single-phase converters.
Key features of the MP2953 include 1 to 6 phase operation, PMBus v1.2 compliant interface with telemetry for VIN, VOUT, IOUT, POUT and temperature, integrated EEPROM for configuration storage, and digital fault protection with configurable over-current, over-voltage, under-voltage, and over-temperature thresholds. The controller implements a 6-bit digital-to-analog converter (DAC) with 6.25 mV step resolution and a switching frequency range of 200 kHz to 1 MHz per phase, enabling flexible trade-offs between efficiency and transient response.
Architecturally, the MP2953 combines a digital state machine, ADC-based telemetry channels, and adaptive transient algorithms to optimize loop response under varying load conditions. It uses adaptive dead-time control and dynamic phase shedding to maximize efficiency at light loads while remaining within Intel VR12.5 specifications. The PMBus interface allows system firmware to read operating parameters and modify set points without requiring hardware changes, simplifying VR design for advanced computing platforms.
Typical applications include VR12.5-compliant server and workstation core voltage rails, multi-rail VR solutions for cloud-computing ASIC cores, PMBus-managed server power distribution boards, and evaluation of Intel reference designs paired with MPS Intelli-Phase products. Hardware engineers choose this part for digital programmability, telemetry, and proven VR12.5 compliance.
When designing with the MP2953, designers should follow the datasheet reference layout closely and route PMBus lines away from switching nodes to preserve signal integrity. Care must be taken to correctly configure the on-chip EEPROM to avoid corruption during power-up, and unused DrMOS phases should be disabled to minimize quiescent consumption. Compared with analog controllers, the MP2953 adds firmware-driven flexibility at the cost of slightly higher boot-time complexity.
بدائل مباشرة لـ MP2953 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
MP2953B
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MP2953A
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MP2953BGU-Z
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MP2953 الحدود القصوى والخصائص الكهربائية
| البنية الطوبولوجية | Digital Multi-Phase PWM Controller |
| Number of Phases | 1 to 6 (configurable) |
| Platform Compliance | Intel VR12.5 |
| الواجهة | PMBus v1.2 compliant |
| DAC Resolution | 6-bit (6.25 mV step) |
| Switching Frequency per Phase | 200 kHz to 1 MHz |
| On-Chip Memory | Integrated EEPROM for configuration |
| Telemetry | VIN, VOUT, IOUT, POUT, Temperature |
| Fault Protection | OCP, OVP, UVP, OTP (programmable) |
| Companion DrMOS | MPS Intelli-Phase products |
| العلبة | QFN-48 (6x6 mm) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (per MPS product page) |
تكوين أطراف MP2953
| دبوس 1 | VCC — Controller supply input |
| دبوس 2 | PWM1 — Phase 1 PWM output to DrMOS |
| دبوس 3 | PWM2 — Phase 2 PWM output to DrMOS |
| دبوس 4 | PWM3 — Phase 3 PWM output to DrMOS |
| دبوس 5 | PWM4 — Phase 4 PWM output to DrMOS |
| دبوس 6 | PWM5 — Phase 5 PWM output to DrMOS |
| دبوس 7 | PWM6 — Phase 6 PWM output to DrMOS |
| دبوس 8 | GND — Ground reference |
| دبوس 9 | VINSNS — Input voltage sense |
| دبوس 10 | VOUTSNS — Output voltage sense |
| دبوس 11 | ISENSE+ — Current sense positive input |
| دبوس 12 | ISENSE- — Current sense negative input |
| دبوس 13 | TSENSE — Temperature sense input |
| دبوس 14 | REF — Reference voltage |
| دبوس 15 | VBOOT — Bootstrap supply |
| دبوس 16 | SCL — PMBus serial clock |
| دبوس 17 | SDA — PMBus serial data |
| دبوس 18 | ALERT — PMBus alert output |
| دبوس 19 | SALERT — SVID alert |
| دبوس 20 | SVID_DATA — SVID data line |
| دبوس 21 | SVID_CLK — SVID clock |
| دبوس 22 | VRHOT — VR hot indicator |
| دبوس 23 | VRREADY — VR ready indicator |
| دبوس 24 | EN — Enable input |
| دبوس 25 | RESET — Reset input |
| دبوس 26 | PWRGD — Power good output |
| دبوس 27 | CFG0 — Configuration strap 0 |
| دبوس 28 | CFG1 — Configuration strap 1 |
| دبوس 29 | CFG2 — Configuration strap 2 |
| دبوس 30 | CFG3 — Configuration strap 3 |
| دبوس 31 | IOUT_OC — Over-current threshold set |
| دبوس 32 | VOUT_OV — Over-voltage threshold set |
| دبوس 33 | VOUT_UV — Under-voltage threshold set |
| دبوس 34 | TON_SET — On-time setting resistor |
| دبوس 35 | RT — Timing resistor |
| دبوس 36 | DROOP |
| دبوس 37 | DISCH# — Discharge control |
| دبوس 38 | BST_SEL — Boot voltage selection |
| دبوس 39 | VID_SEL — VID selection input |
| دبوس 40 | NC — Not connected (per datasheet) |
| دبوس 41 | NC — Not connected (per datasheet) |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | AVSS — Analog ground |
| دبوس 45 | AVCC — Analog supply |
| دبوس 46 | DVSS — Digital ground |
| دبوس 47 | DVCC — Digital supply |
| دبوس 48 | EP — Exposed thermal pad, connect to ground |
التطبيقات النموذجية
MP2953 مناسب لـ 6 التطبيقs: Intel VR12.5 Server Core Voltage Rail, Multi-Rail VR for Cloud-Computing ASICs, PMBus-Managed Server Power Distribution, Workstation Multi-Phase VR12.5 Core Rail, Evaluation and Reference Designs for VR12.5, High-Current ASIC POL Converter Replacement.
Intel VR12.5 Server Core Voltage Rail
The MP2953 was built to power Intel VR12.5-compliant CPU core rails, hosting a digital state machine that decodes SVID commands and drives 1 to 6 MPS Intelli-Phase DrMOS stages in parallel. With a 6-bit DAC offering 6.25 mV step resolution and switching frequencies up to 1 MHz per phase, it tracks Intel load-line specifications accurately while keeping output ripple low. Compared with analog controllers, the digital loop and on-chip EEPROM streamline platform tuning and field upgrades.
موصى به
Multi-Rail VR for Cloud-Computing ASICs
Modern cloud ASICs demand fine-grained telemetry and rapid fault response on their core rails; the MP2953 delivers both via its PMBus v1.2 interface and programmable OCP/OVP/UVP/OTP thresholds. The 1 to 6 phase flexibility allows scaling from a compact single-phase output to high-current multi-phase rails using the same controller silicon. Designers leverage the on-chip EEPROM to store per-rail configurations, simplifying firmware bring-up across heterogeneous compute boards.
موصى به
PMBus-Managed Server Power Distribution
Server PSUs and intermediate bus converters benefit from the MP2953's real-time monitoring of VIN, VOUT, IOUT, POUT, and temperature, which feeds directly into platform telemetry stacks. Combined with MPS Intelli-Phase DrMOS stages, the controller delivers high efficiency at light loads through adaptive phase shedding and dynamic dead-time optimization. This lets hyperscale operators track per-board power consumption for capacity planning without external sense circuitry.
موصى به
Workstation Multi-Phase VR12.5 Core Rail
Workstation motherboards use the MP2953 to meet VR12.5 specifications while exposing firmware-readable telemetry for diagnostic utilities. The 200 kHz to 1 MHz switching range per phase enables engineers to trade efficiency for transient response depending on the workstation's workload profile. The integrated EEPROM accelerates mass production by removing the need for external configuration storage on each board revision.
موصى به
Evaluation and Reference Designs for VR12.5
MPS publishes evaluation kits and reference designs that pair the MP2953 with its Intelli-Phase family to accelerate Intel VR12.5 platform bring-up. These designs highlight PCB layout, PMBus command sequences, and EEPROM programming flows, providing a starting point for new VR solutions. Engineers can evaluate transient response and telemetry accuracy across 1 to 6 phase configurations without redesigning the digital controller.
موصى به
High-Current ASIC POL Converter Replacement
When migrating from discrete analog multi-phase solutions to a digital controller, designers can substitute with the MP2953 to gain PMBus telemetry and programmable fault thresholds without expanding the BOM. The QFN-48 footprint matches several legacy digital controller pads, and the on-chip EEPROM replaces external configuration memory. Pairing with MPS Intelli-Phase DrMOS products keeps the power stage compact while supporting currents of 100 A or more.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MP2953 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MP2953B | MP2953A | MP2953BGU-Z |
|---|---|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Package | QFN-48 (6x6 mm) | QFN-48 (6x6 mm) - same | QFN-48 (6x6 mm) - same | QFN-48 (6x6 mm) - same |
| Silicon Revision | Original (rev A equivalent) | Rev B (updated telemetry) | Rev A (same as base MP2953) | Rev B (tape and reel) |
| Number of Phases | 1 to 6 | 1 to 6 | 1 to 6 | 1 to 6 |
| Intel Platform | VR12.5 | VR12.5 | VR12.5 | VR12.5 |
| PMBus Interface | Yes (v1.2) | Yes (v1.2, updated calibration) | Yes (v1.2, original calibration) | Yes (v1.2, updated calibration) |
| On-chip EEPROM | Yes | Yes | Yes | Yes |
| Packaging Format | Tray / production | Tray / production | Tray / production | Tape & Reel (production) |
أبرز الفروقات
- Digital programmability with on-chip EEPROM (مقابلMP2953A)
- Updated IOUT/POUT telemetry calibration (مقابلMP2953A)
- Production-ready tape-and-reel packaging (مقابلMP2953)
ملاحظات التصميم
Route the PMBus SCL/SDA traces as differential-style controlled-impedance pairs away from the switching PWM outputs to avoid coupling from phase nodes. Place the controller's decoupling capacitors as close as possible to the AVCC/DVCC pins, and stitch the exposed pad of the QFN-48 with multiple thermal vias to a continuous ground plane. Following the MPS reference layout is critical for a design to meet Intel VR12.5 SVID timing and noise margins.
When migrating from the MP2953A to MP2953B silicon, expect PMBus-reported IOUT/POUT values to read 2 to 3 times higher under the same loading, as noted on the MPS engineering forum. Compensation tables in any system management firmware must be updated, or telemetry values will be misinterpreted during thermal and power-headroom calculations.
Estimated: total controller power dissipation scales with switching frequency and the number of active phases. At 500 kHz per phase and 6 enabled phases driving a 1.0 V core, the controller itself dissipates well under 1 W, but each Intelli-Phase DrMOS dissipates its share; provide adequate copper area on each power stage to keep junction temperatures below 125 C.
معلومات الامتثال
RoHS compliance and lead-free status confirmed per the MPS product page; AEC-Q100 not applicable for a server CPU VR controller.
