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Monolithic Power Systems Inc. MEZD81260A-0000
- Part No.:
- MEZD81260A-0000
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 28-LGA Module
- Datasheet:
-
MEZD81260A-0000.pdf
- Description:
- 16V/60A DC/DC OPEN FRAME MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:4,586
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Product details
Overview
mEZD81260A-0000 from Monolithic Power Systems is a digital synchronous step-down open-frame DC/DC power module with integrated inductor, supporting dual-phase (60A total) or dual-rail (2×30A) operation. It features COT control, PMBus 1.1 interface (up to 1 MHz), 5–16V input, 0.5–3.3V output, and full fault protection (OVP/UVP/OCP/OTP/UVLO). It targets high-density POL applications in telecom, servers, and FPGA/DSP power delivery.
For engineers reviewing the mEZD81260A-0000 datasheet, mEZD81260A-0000 pinout, mEZD81260A-0000 application, or mEZD81260A-0000 equivalent, key selection criteria include programmable rail sequencing, remote voltage sensing per rail, interleaved current sharing accuracy (<±3% at 60A), ultrasonic mode for audible-noise-sensitive systems, and EEPROM-based configuration persistence across power cycles.
Technical Context
The mEZD81260A-0000 implements a digital Constant-On-Time (COT) control architecture with adaptive phase shedding and proprietary current-balancing algorithms. Its dual-loop compensation supports both steady-state regulation and sub-10µs transient response (10A→40A load step).
It integrates two independent 8-bit VID DACs (5mV/step), differential remote sense amplifiers per rail, real-time phase current monitoring, and thermal balancing via programmable phase current offset-enabling optimized thermal distribution across LGA-28 package MOSFETs under asymmetric airflow conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 16V - supports common intermediate bus rails (5V, 12V) without external pre-regulation |
| Output Current Capability | 60A continuous (dual-phase) or 2×30A (dual-rail) - enables single-module replacement of multi-phase discrete controllers + DrMOS |
| Switching Frequency | 200kHz to 2MHz - programmable for EMI optimization or efficiency trade-offs; ultrasonic mode enforces >25kHz at light load |
| Output Voltage Range | 0.5V to 3.3V - covers core voltages for modern FPGAs, ASICs, and microprocessors |
| PMBus Compliance | PMBus 1.1 up to 1MHz - enables real-time telemetry (VIN/VOUT/IOUT/temp), configuration, and fault logging via standard system management bus |
| Thermal Resistance | θJA = 9°C/W, θJB = 1.5°C/W - validated on 6-layer demo board; supports 60A operation with ≥1m/s airflow at ≤85°C ambient |
| Protection Features | OVP/UVP/OCP/OTP/UVLO with auto-fault recording - latched, hiccup, or retry modes configurable per fault type via PMBus |
Pinout & Package
LGA-28 package (25 mm × 15.5 mm × 7 mm), bottom-soldered, with exposed thermal pad. Designed for high-current PCB routing and forced-air cooling in open-frame server/telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,8 | VIN | Main input power supply connection; requires local ceramic decoupling and wide copper traces for 60A peak current handling |
| 2,3,6,7,17,18,19,20 | GND | System ground reference for all outputs and sensing; must be connected via multiple vias to internal ground plane for low-impedance return path |
| 21,22 | OUT1 | Rail 1 power output terminal; carries up to 30A in dual-rail mode or shares 60A in interleaved dual-phase mode |
| 15,16 | OUT2 | Rail 2 power output terminal; electrically tied to OUT1 in dual-phase configuration for current doubling |
| 4,5 | EN1 / EN2 | Independent enable inputs for each rail; support programmable power-on/off sequencing with 0–5ms delay via CLK SYNC pin |
| 9,10 | PG1 / PG2 | Open-drain power-good indicators; assert high when respective rail output is within ±5% of target (95–105% VREF) |
| 11,12,13,14 | VO1_S+, VO1_S−, VO2_S+, VO2_S− | Differential remote sense pairs per rail; eliminate IR drop error by measuring voltage directly at load point |
| 23 | ADDR | PMBus slave address selection pin; sets one of 16 addresses via resistor-to-GND for multi-module bus addressing |
| 25,26 | SDA / SCL | Standard PMBus bidirectional data and clock lines; support hot-plug capable I²C timing up to 1MHz |
| 27 | WP | EEPROM write-protection input; prevents accidental register corruption during field operation |
| 28 | CLK SYNC | 100kHz synchronization input for coordinated startup/shutdown across multiple modules; must be pulled high in standalone use |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode topology | Configurable as either dual-phase (60A single output) or dual-rail (2×30A independent outputs) via PMBus command - eliminates need for separate BOM variants |
| Remote sensing per rail | True differential voltage sensing (VOx_S+/−) with <±1% load regulation over 0–30A - maintains tight core voltage at processor die despite PCB IR drop |
| Digital current balancing | Proprietary PI loop with programmable phase current offset - achieves <±3% inter-phase current mismatch at full 60A load and enables thermal derating based on local airflow |
| Fault logging | EEPROM-based auto-record of last 8 fault events (OCP/OVP/OTP) with timestamp and rail identifier - accelerates field failure root-cause analysis |
| Ultrasonic switching | Forced >25kHz operation in DCM mode - eliminates audible coil whine in noise-sensitive telecom and medical equipment enclosures |
Applications
| Server CPU Core Power | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Delivering tightly regulated 0.8–1.2V at up to 60A to high-performance x86 CPUs in 1U rack servers with strict thermal envelope constraints. IC Role / Device Role / Timing Role: Primary POL regulator with digital telemetry, phase shedding, and dynamic voltage scaling via PMBus commands. Use Value: Replaces 3-phase discrete VR solution with 40% smaller footprint and eliminates external current-sense resistors and phase-control logic. | Use Scenario: Powering multiple I/O banks on large Xilinx UltraScale+ FPGAs requiring independent 1.2V, 1.8V, and 3.3V rails with precise sequencing. IC Role / Device Role / Timing Role: Dual-rail configuration provides two independently enabled, monitored, and protected outputs with programmable power-up order. Use Value: Eliminates need for discrete sequencers and dedicated supervisors; enables firmware-controlled rail bring-up and fault isolation per bank. |
| Telecom Line Card DC/DC | Industrial ATE Load Board |
Use Scenario: Generating 3.3V and 1.2V from 12V backplane for packet processing ASICs and SerDes PHYs in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-rail converter with remote sensing per output and PMBus telemetry for real-time health monitoring in NEBS-compliant systems. Use Value: Meets -40°C to +85°C operating range with <±1% output accuracy over temperature and load, reducing need for post-assembly calibration. | Use Scenario: Providing highly stable, low-noise 1.5V/2A and 3.3V/2A supplies to DUT power pins on automated test equipment load boards. IC Role / Device Role / Timing Role: Dual-rail mode with independent OCP thresholds and fast transient response (<20µs recovery) for dynamic DUT current draw. Use Value: Enables sub-10mV p-p ripple at full load and supports rapid load steps without droop-critical for parametric test repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital multiphase POL converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3690-50B | Successor part with identical LGA-28 footprint, 50A rating (vs. 60A), enhanced efficiency (90% @1V/40A), and extended VIN range (3–18V) | End-of-life notice explicitly directs migration to MPM3690-50B; supports same dual-phase/dual-rail modes and PMBus 1.1 interface | Select for new designs requiring longer product lifecycle, higher efficiency at mid-load, and wider input tolerance |
| TPS53689T | TI 60A dual-output digital controller (no integrated inductor); requires external DrMOS and power stages; supports SVI3 interface in addition to PMBus | Targets high-end client/server platforms with Intel VR13/VR14 compliance; lacks integrated magnetics and remote sensing per rail | Choose only if SVI3 protocol integration or discrete power stage flexibility is required; adds BOM complexity and layout effort |
Compared with mEZD81260A-0000, MPM3690-50B offers improved thermal performance and longer availability but reduces max current by 10A; TPS53689T provides greater control flexibility and protocol options but increases design effort and component count due to external power stage dependency.
Availability
mEZD81260A-0000 is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard development, and FPGA-based industrial control systems requiring stable component supply during legacy platform maintenance.
Supply support for mEZD81260A-0000 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, motion control, and automotive applications.
The mEZD series is MPS's family of fully integrated digital power modules targeting high-density, high-reliability point-of-load conversion in datacenter, networking, and industrial equipment-designed to reduce design cycle time and improve power system efficiency.
FAQ
What does "END OF LIFE, REFER TO MPM3690-50B" mean for mEZD81260A-0000?
This official end-of-life notice from Monolithic Power Systems indicates that mEZD81260A-0000 is no longer recommended for new designs and will be discontinued per MPS's product lifecycle policy. Production shipments are limited, and long-term supply cannot be guaranteed. Customers are directed to migrate to the pin-compatible, functionally enhanced successor MPM3690-50B, which retains the same LGA-28 package and dual-phase/dual-rail architecture while improving efficiency and input voltage range.
Can mEZD81260A-0000 operate in dual-phase mode with only one output rail enabled?
Yes. The device supports asymmetric operation: one rail can be disabled (via EN1/EN2) while the other operates at up to 60A in dual-phase mode. In this configuration, OUT1 and OUT2 are internally paralleled, and current-sharing logic remains active to balance conduction between internal phases. Output voltage is set identically for both rails via VOUT_COMMAND, and telemetry reports aggregate current and thermal data.
How is remote sensing implemented for output voltages above 1.52V?
For VOUT > 1.52V, an external resistor divider (e.g., 3.01kΩ/2.05kΩ for 3.3V) scales the output down to fit within the 0.25–1.52V range of the internal 8-bit DAC. The divider ratio (KR) is programmed into register VOUT_SCALE_LOOP (29h) using equation KR = (VOUT_SCALE_LOOP × 2⁻⁷), enabling the controller to reconstruct true output voltage. VOSEN/VOSEN− pins connect to the divider's output node-not the load-to maintain stability.
Does mEZD81260A-0000 support dynamic voltage scaling (DVS) during operation?
Yes. Real-time DVS is supported via PMBus VOUT_COMMAND (21h) writes, allowing output voltage changes from 0.5V to 3.3V in 5mV steps without cycling EN. Slew rate is controlled by internal soft-start circuitry (programmable 0–6s TON_DELAY), limiting dV/dt to prevent overshoot. Full telemetry (VOUT, IOUT, temperature) remains accessible during transitions for closed-loop system control.
What thermal derating applies at 60A output with 0.5m/s airflow?
At 0.5m/s airflow, the module's maximum continuous output current is reduced to ~42A (70% of rated 60A) to maintain junction temperature ≤125°C. This is derived from thermal resistance data (θJA = 9°C/W) and efficiency curves: at 12V/1V/42A, power dissipation ≈ 5.2W, resulting in ΔT ≈ 47°C above ambient. Derating tables in the datasheet confirm 42A at 0.5m/s and 25°C ambient.
Is the CLK SYNC pin required when using only one mEZD81260A-0000 module?
Yes. Even in single-module operation, CLK SYNC must be pulled to 3.3V with a 10kΩ resistor. Leaving it floating violates absolute maximum ratings and may cause erratic startup timing or failure to exit UVLO. The pin controls internal state-machine synchronization for soft-start and fault recovery sequences; proper biasing ensures deterministic behavior regardless of system count.
MEZD81260A-0000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 28-LGA Module
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 16V
- Voltage - Output 1:
- 16V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 60A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Remote Sense
- Operating Temperature:
- -
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-LGA (25x15.5)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MEZD81260A-0000 FAQ
1.How can I place an order for MEZD81260A-0000 through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD81260A-0000 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 MEZD81260A-0000 reliable?
The price and inventory of MEZD81260A-0000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD81260A-0000 is usually 5 days.
3.What payment methods are accepted for MEZD81260A-0000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD81260A-0000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD81260A-0000?
MEZD81260A-0000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD81260A-0000 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 MEZD81260A-0000?
For technical support, including MEZD81260A-0000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD81260A-0000 requirements.
6.How does Aetrix verify that MEZD81260A-0000 is sourced from the original manufacturer or authorized distributors?
All MEZD81260A-0000 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 MEZD81260A-0000 meets industry standards.
7.What is the process for return or replacement of MEZD81260A-0000?
All MEZD81260A-0000 units undergo pre-shipment inspection (PSI). If there is an issue with MEZD81260A-0000, 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 MEZD81260A-0000 part is unused and in its original packaging.
Return procedure for MEZD81260A-0000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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