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Monolithic Power Systems Inc. MP8854GL-P
- Part No.:
- MP8854GL-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFQFN
- Datasheet:
-
MP8854GL-P.pdf
- Description:
- IC REG BUCK PROG 4A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,067
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Product details
Overview
MP8854GL-P from Monolithic Power Systems is a synchronous step-down DC/DC converter delivering 4A continuous output current with I²C telemetry and programmable voltage regulation across a 2.85V–18V input range. It integrates high-side and low-side MOSFETs, supports real-time VOUT adjustment from 0.6V to 1.108V in 4mV steps, provides ±1% reference accuracy, and features open-drain power-good (PG) signaling for SSD and server power rail monitoring.
For engineers reviewing the MP8854GL-P datasheet, MP8854GL-P pinout, MP8854GL-P application, or MP8854GL-P equivalent, this device serves as a telemetry-enabled, wide-input buck regulator optimized for dynamic load management in space-constrained embedded systems requiring precise voltage control, thermal robustness, and I²C-based system-level power supervision.
Technical Context
The MP8854GL-P employs constant-on-time (COT) control architecture to deliver fast transient response without external compensation, maintaining stable switching frequency across input voltage variations. Its integrated dual-MOSFET power stage includes 50mΩ high-side and 20mΩ low-side RDS(ON), enabling high efficiency at light and heavy loads.
I²C interface enables full configuration of output voltage, slew rate, switching frequency (400–600kHz), current limit (5.5A), PFM/PWM mode selection, and hiccup/latch-off OCP behavior. Four selectable I²C addresses (61H, 63H, 65H, 67H) support multi-rail telemetry in dense power architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.85V to 18V - supports single-rail operation from 3.3V logic supplies up to 15V industrial rails without external pre-regulation. |
| Output Current | 4A continuous - sustains full rated load at +125°C junction temperature with proper PCB thermal design on QFN-14 package. |
| Reference Accuracy | ±1% at +25°C, ±1.5% over –40°C to +125°C - ensures tight output voltage tolerance for sensitive SoC cores and memory interfaces. |
| I²C Telemetry | 5% accuracy for VOUT and IOUT monitoring - enables closed-loop system health reporting without external ADCs or sense resistors. |
| Switching Frequency | 400–600kHz (adjustable via register D[5:4]) - balances EMI performance and inductor size for compact 1.5µH designs. |
| OVP/UVP Thresholds | OVP: 121–129% VREF rising; UVP: 55–65% VREF - provides robust fault detection with 3.7µs OVP delay and 10µs UVP delay. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or airflow loss in enclosed systems. |
Pinout & Package
MP8854GL-P is housed in a thermally enhanced QFN-14 (3mm × 4mm) package with exposed thermal pad (PGND-connected) for efficient heat dissipation in high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects to SW node via 22nF capacitor to generate floating gate drive for high-side MOSFET. |
| 2 SW | Power switch node | High-current switching output; requires wide copper trace and low-inductance layout to minimize ringing and losses. |
| 3 SCL | I²C clock input | HS-mode compatible (0–3.4MHz); internal pull-up not provided - external 2.2kΩ to VCC required. |
| 4 SDA | I²C data bidirectional | Open-drain I/O; shares same electrical specs as SCL with Schmitt-trigger inputs and 3mA sink capability. |
| 5 EN | Enable control | 1.2V typical threshold with 110mV hysteresis; 1.5MΩ internal pull-down allows direct connection to VIN for auto-start. |
| 6 A0 | I²C address select | Voltage divider input (0.24–0.77×VCC) sets one of four I²C addresses (61H/63H/65H/67H). |
| 7 PG | Power-good indicator | Open-drain output asserted when VOUT is within ±10% window (0.9–1.09×VREF); 30µs deglitch time configurable via I²C. |
| 8 PGND | Power ground | Main return path for high-current switching loop; must be connected directly to thermal pad and isolated from AGND plane. |
| 9 VIN | Main input supply | Accepts 2.85–18V; requires ≥2×22µF ceramic input capacitance placed near pins 9 and 10 to suppress ripple and EMI. |
| 10 VOUT | Output voltage sense | Direct connection to output capacitor positive terminal; used for remote sensing in high-accuracy applications. |
| 11 FB | Feedback input | Resistor-divider tap point; sets VOUT = 0.6V × (1 + R1/R2); supports up to 5.5V output using external divider. |
| 12 SS | Soft-start timing | Capacitor-to-ground sets ramp time; 7µA internal current yields ~1ms/ms per µF for controlled inrush limiting. |
| 13 VCC | Internal LDO output | 3.5V regulated supply for gate drivers and logic; decoupled with 470nF ceramic capacitor to ensure stability. |
| 14 AGND | Analog ground | Signal reference for FB, SS, A0, SCL/SDA; must be tied to PGND at single point near IC to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range with UVLO | 2.85V start-up with 2.65V rising UVLO threshold ensures reliable operation down to single-cell Li-ion or 3.3V backup rails. |
| I²C-programmable VOUT slew rate | Configurable dV/dt prevents overshoot during dynamic voltage scaling in CPU/GPU DVFS applications. |
| Hiccup-mode OCP | Auto-retry protection limits average power during short-circuit faults while maintaining system visibility via I²C status registers. |
| PFM/PWM mode selection | Auto-PFM improves light-load efficiency (>85% at 10mA), while forced PWM guarantees fixed-frequency EMI profile under all loads. |
| External soft-start | Capacitor-controlled ramp eliminates inrush current stress on input capacitors and upstream converters in multi-stage supplies. |
Applications
| Solid-State Drive (SSD) Power Rail | Flat-Panel Display Logic Supply |
|---|---|
|
Use Scenario: Powers NVMe controller and NAND flash I/O interface in M.2 SSD modules with dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary buck regulator with I²C telemetry for real-time rail health monitoring and firmware-driven voltage margining. Use Value: Enables adaptive VDDQ control to extend NAND endurance and reduce active power by 12% versus fixed-output alternatives. |
Use Scenario: Supplies 1.2V/1.8V logic rails for TCON and timing controller ICs in 4K LCD panels. IC Role / Device Role / Timing Role: High-PSRR, low-noise buck converter with fast COT response to handle bursty display data loading transients. Use Value: Maintains <±1% output regulation during 4A load steps (10–90%), eliminating visible image artifacts during rapid scene changes. |
| Distributed Server Power | Set-Top Box Core Supply |
|
Use Scenario: Provides 1V/4A core voltage to ASICs in modular server blades with centralized PMBus/I²C power management. IC Role / Device Role / Timing Role: Telemetry node in hierarchical power architecture, reporting VOUT, IOUT, temperature, and fault status to BMC. Use Value: Delivers 94% peak efficiency at 12V input, reducing board-level heat density by 3.2W versus discrete controller+MOSFET solutions. |
Use Scenario: Generates 1.1V core supply for ARM-based media processors in low-cost digital set-top boxes. IC Role / Device Role / Timing Role: Cost-optimized, fully integrated buck with minimal external components (only inductor, caps, feedback resistors). Use Value: Reduces BOM count by 7 parts versus controller+external FET designs while meeting ENERGY STAR standby power requirements (<150mW). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8855GQ-A | Automotive-grade AEC-Q100 qualified; identical I²C telemetry, but wider -40°C to +150°C TJ rating and enhanced ESD (±8kV HBM). | Required for infotainment head units and ADAS domain controllers where automotive qualification is mandatory. | Select MPQ8855GQ-A only when AEC-Q100 compliance, extended temperature, or higher ESD immunity are system requirements. |
| RTQ2134B-QA | Supports 2.5V–18V input, 4A output, but lacks I²C telemetry; uses analog enable/PG and resistor-programmed VOUT with ±2% accuracy. | Suitable for cost-sensitive consumer electronics where telemetry and fine-grained voltage control are unnecessary. | Choose RTQ2134B-QA when system-level monitoring is handled externally and BOM cost reduction outweighs programmability benefits. |
Compared with MP8854GL-P, MPQ8855GQ-A adds automotive reliability at no trade-off in telemetry capability, while RTQ2134B-QA sacrifices configurability and accuracy for lower unit cost and simpler integration-making each alternative optimal only within its defined use envelope.
Availability
MP8854GL-P is available at Aetrix Electronics and suitable for solid-state drives, flat-panel displays, distributed server power systems, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MP8854GL-P 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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.
The MP8854 belongs to MPS's telemetry-enabled high-efficiency buck converter product line, designed specifically for intelligent power systems requiring real-time monitoring, dynamic voltage scaling, and robust fault handling in space-constrained applications.
FAQ
What is the minimum output voltage achievable with MP8854GL-P?
The MP8854GL-P supports an I²C-programmable reference range from 0.6V to 1.108V in 4mV steps. When configured via the FB pin with an external resistor divider, it can regulate up to 5.5V output. The 0.6V internal reference is fixed and cannot be lowered further through register settings or external circuitry.
Does MP8854GL-P support forced continuous conduction mode (CCM)?
Yes, MP8854GL-P supports forced PWM mode via I²C register control (bit D[6] in register 01). In this mode, the converter operates in continuous conduction regardless of load, maintaining fixed frequency and eliminating low-load frequency variation for predictable EMI filtering.
How is thermal performance affected by PCB layout?
Thermal resistance θJA drops from 130°C/W (JEDEC standard) to 22°C/W on the EV8854-L-00A 4-layer board. Effective thermal design requires connecting the exposed thermal pad to a large internal PGND plane using ≥6 thermal vias (0.3mm diameter) and minimizing trace inductance on VIN/VOUT paths.
Can MP8854GL-P monitor output current accurately without external sense resistors?
Yes, MP8854GL-P provides on-chip output current monitoring via I²C with ±5% accuracy across temperature. This is achieved using internal MOSFET RDS(ON) sensing and calibrated gain stages - eliminating the need for external current-sense resistors and associated power loss.
What I²C bus voltage levels are supported for SCL/SDA communication?
The MP8854GL-P supports I²C bus voltages from 1.8V to 3.6V, with compatible logic thresholds (VIL ≤ 0.3VCC, VIH ≥ 0.7VCC) and 3mA sink capability on SDA/SCL. Pull-up resistors must be selected accordingly - e.g., 2.2kΩ for 3.3V bus with 400pF total capacitance.
Is there a recommended inductor value for 12V input to 1V output operation?
For VIN=12V → VOUT=1V at 4A, MPS recommends a 1.5µH shielded power inductor with ≤2.1mΩ DCR (e.g., Coilcraft XAL6060-152MEB). This value balances peak inductor current (≤5.5A), core loss, and transient response while fitting within the 500kHz nominal switching frequency range.
How does the power-good (PG) signal behave during startup and fault conditions?
PG asserts high (open-drain pulled up externally) only after VOUT reaches and remains within 0.9–1.09×VREF for ≥30µs. During startup, PG remains low until regulation is established; during OVP/UVP or thermal shutdown, PG de-asserts within 1–2 switching cycles and stays low until recovery.
MP8854GL-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 14-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.85V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.108V
- Current - Output:
- 4A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP8854GL-P FAQ
1.How can I place an order for MP8854GL-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8854GL-P 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 MP8854GL-P reliable?
The price and inventory of MP8854GL-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8854GL-P is usually 5 days.
3.What payment methods are accepted for MP8854GL-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8854GL-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8854GL-P?
MP8854GL-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8854GL-P 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 MP8854GL-P?
For technical support, including MP8854GL-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8854GL-P requirements.
6.How does Aetrix verify that MP8854GL-P is sourced from the original manufacturer or authorized distributors?
All MP8854GL-P 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 MP8854GL-P meets industry standards.
7.What is the process for return or replacement of MP8854GL-P?
All MP8854GL-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8854GL-P, 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 MP8854GL-P part is unused and in its original packaging.
Return procedure for MP8854GL-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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