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Monolithic Power Systems Inc. MP8869WGL-Z
- Part No.:
- MP8869WGL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP8869WGL-Z.pdf
- Description:
- IC REG BUCK PROG 12A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,108
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Product details
Overview
MP8869WGL-Z from Monolithic Power Systems is a wide-input (3V–18V), 12A continuous synchronous step-down converter with integrated I²C telemetry, constant-on-time control, open-drain power-good output, and QFN-14 (3mm×4mm) packaging. It delivers precise output voltage programming (0.6V–1.55V in 7.5mV steps), real-time current/voltage monitoring (±5% accuracy), and configurable protection including hiccup-mode OCP and thermal shutdown. It targets high-density SSD and server point-of-load applications requiring dynamic rail control.
For engineers reviewing the MP8869WGL-Z datasheet, MP8869WGL-Z pinout, MP8869WGL-Z application, or MP8869WGL-Z equivalent, this page provides verified electrical parameters, validated I²C register-controlled features (frequency, slew rate, PFM/PWM mode), package-specific layout guidance for PGND/AGND separation, and confirmed alternatives for migration from legacy designs.
Technical Context
The MP8869WGL-Z implements constant-on-time (COT) control with internal ramp compensation, enabling stable operation with ceramic-only output capacitors and eliminating ESR dependency. Its dual-loop architecture supports both FB-resistor-set operation (0.6V reference) and I²C-programmed regulation (0.6V–1.55V range).
I²C interface enables full digital supervision: output voltage slew rate control, selectable switching frequency (400–600 kHz typical), programmable current limit (14 A), 4 configurable I²C addresses (via A0 resistor divider), and real-time VOUT/IOUT readback with ±5% accuracy. The EN pin supports direct VIN connection for auto-start and internal 1.5 MΩ pull-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 18V - Supports industrial, server, and SSD input rails without external pre-regulation. |
| Output Current | 12A continuous / 15A peak - Delivers high current density in compact QFN-14 package with thermal pad. |
| Output Voltage Accuracy | ±1% internal reference - Ensures tight regulation stability across -40°C to +125°C junction temperature. |
| I²C Voltage Programming | 0.6V–1.55V in 7.5mV steps - Enables fine-grained, on-the-fly adjustment of CPU/GPU core rails during system runtime. |
| Switching Frequency | 400–600 kHz (typical) - Balances efficiency, EMI, and inductor size; adjustable via I²C register D[5:4]. |
| Protection Features | OVP (121–129% VREF), hiccup-mode OCP, thermal shutdown (160°C), UVLO (2.7–2.92V) - Comprehensive fault coverage for unattended operation. |
| Power-Good Signal | Open-drain PG with 0.86–0.94VOUT UV threshold and 1.11–1.19VOUT OV threshold - Provides reliable system sequencing and fault flagging. |
Pinout & Package
MP8869WGL-Z is housed in a thermally enhanced QFN-14 (3mm × 4mm) package with exposed thermal pad (PGND-connected). PCB layout requires dedicated PGND plane stitching via multiple vias under the pad and strict separation of AGND from PGND except at single-point connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects external capacitor between SW and BST to bias high-side gate driver; critical for HS-FET turn-on. |
| 2 SW | Power switch node | High-current switching output; requires wide copper trace and low-inductance routing to minimize ringing. |
| 3 SCL | I²C clock input | HS/LS-mode compatible; supports up to 3.4 MHz; internal Schmitt trigger ensures noise immunity. |
| 4 SDA | I²C data bidirectional | Open-drain I/O; requires external pull-up; supports hot-plug detection and multi-master arbitration. |
| 5 EN | Enable control | 1.5 MΩ internal pull-down; 18V-tolerant - allows direct VIN tie for automatic startup or microcontroller GPIO control. |
| 6 A0 | I²C address select | Voltage-divider input (0.24–0.77×VCC) sets one of four I²C addresses (60H/62H/64H/66H). |
| 7 PG | Power-good indicator | Open-drain output asserted when VOUT is within ±10% window; sinks ≥4 mA at 0.4 V. |
| 8 PGND | Power ground reference | Primary return path for high-current loops (SW, VIN, VOUT); must be low-impedance plane with thermal pad vias. |
| 9 VIN | Main input supply | 3V–18V input; requires local 22 µF ceramic decoupling; wide trace mandatory for 12A peak currents. |
| 10 VOUT | Output voltage sense | Direct connection to load positive terminal; used for telemetry readback and OVP sensing. |
| 11 FB | Feedback input | Used only in resistor-set mode (0.6V reference); disconnected in I²C mode where VOUT is directly monitored. |
| 12 SS | Soft-start timing | Capacitor-to-ground sets ramp time; prevents output overshoot and inrush current during startup. |
| 13 VCC | Internal LDO output | 3.5V regulated supply for internal circuitry; requires 470 nF ceramic decoupling; tracks VIN below 3.5V. |
| 14 AGND | Analog ground reference | Signal ground for FB, SDA/SCL, A0; must connect to PGND at single point near IC to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated telemetry interface | I²C enables real-time readback of VOUT and IOUT with ±5% accuracy - eliminates need for external ADC/sense resistors. |
| Digital programmability | Full configuration via I²C: output voltage (7.5mV steps), slew rate, frequency, current limit, PFM/PWM mode, and protection thresholds. |
| Stable ceramic-capacitor operation | Built-in ramp compensation removes ESR dependency - supports ultra-low-ESR MLCCs for reduced BOM cost and board area. |
| Robust thermal management | QFN-14 package with exposed thermal pad achieves θJA = 48°C/W (4-layer PCB); thermal shutdown at 160°C with 20°C hysteresis. |
| Flexible enable and sequencing | EN pin supports direct VIN tie for auto-start or logic-level control; PG output provides precise power-rail status for FPGA/CPU sequencing. |
Applications
| Solid-State Drive (SSD) Power Rail | Server Point-of-Load Regulation |
|---|---|
|
Use Scenario: Regulating 1.2V/12A core voltage for NVMe SSD controllers under dynamic workload. IC Role / Device Role / Timing Role: Primary synchronous buck converter with I²C telemetry for adaptive voltage scaling (AVS) and health monitoring. Use Value: 7.5mV-step voltage programming enables precise AVS to reduce controller power by up to 18% during idle states. |
Use Scenario: Delivering 0.85V/12A to ASICs in 1U server blades with strict thermal envelope constraints. IC Role / Device Role / Timing Role: High-current POL converter with COT control for fast transient response to bursty compute loads. Use Value: 400–600 kHz switching frequency balances efficiency (>92% at 12A) and EMI compliance in dense backplane layouts. |
| Flat-Panel Display Logic Supply | Distributed Power Architecture |
|
Use Scenario: Generating 1.1V/12A for display timing controllers (TCON) in 4K UHD monitors with minimal ripple. IC Role / Device Role / Timing Role: Low-noise synchronous buck with ceramic-capacitor optimization and PG sequencing for panel initialization. Use Value: Internal ramp compensation ensures stability with 22 µF×4 ceramic output bank - reduces output ripple to <5 mVpp. |
Use Scenario: Local regulation of 1.5V/12A from 12V intermediate bus in telecom baseband units with remote telemetry. IC Role / Device Role / Timing Role: Digitally supervised buck converter supporting I²C-based system-level power management and fault logging. Use Value: Four selectable I²C addresses allow daisy-chaining up to 4 converters on same bus for coordinated rail margining and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMP8869S | Successor device with enhanced thermal performance (θJA = 42°C/W), extended I²C telemetry (temperature readback), and updated register map. | Designed for new designs requiring longer product lifecycle support and improved efficiency above 10A load. | Select MMP8869S for all new designs; MP8869WGL-Z is not recommended for new designs per MPS documentation. |
| MP8862GQ | Lower-current (8A) variant in QFN-13 (3mm×4mm); lacks I²C telemetry but retains COT control and similar protection set. | Suitable for cost-sensitive applications where digital supervision is unnecessary and peak current ≤8A. | Choose MP8862GQ only if telemetry and >10A capability are not required - avoids overdesign and reduces firmware complexity. |
Compared with MP8869WGL-Z, MMP8869S offers superior thermal metrics and extended telemetry for next-gen platforms, while MP8862GQ trades programmability and current rating for lower BOM cost and simpler integration in fixed-rail systems.
Availability
MP8869WGL-Z is available at Aetrix Electronics and suitable for solid-state drive power delivery, server point-of-load regulation, flat-panel display logic supplies, and distributed power architectures requiring stable component supply and long-term sourcing continuity.
Supply support for MP8869WGL-Z 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 power ICs, with a focus on energy-efficient DC-DC conversion, motor drivers, and LED lighting solutions.
The MP8869W series belongs to MPS's digitally enhanced power management portfolio, designed specifically for high-current, telemetry-enabled point-of-load applications in datacenter, storage, and display electronics where dynamic voltage control and system visibility are critical.
FAQ
Is MP8869WGL-Z recommended for new designs?
No. MPS explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MMP8869S" in the datasheet revision 1.1. The MMP8869S is the designated successor with improved thermal resistance (θJA = 42°C/W vs. 48°C/W), extended I²C telemetry including die temperature readback, and updated register definitions for enhanced system diagnostics.
What is the function of the A0 pin, and how is it configured?
The A0 pin selects one of four I²C addresses (60H, 62H, 64H, or 66H) via a resistor divider from VCC to GND. Four distinct voltage thresholds (0.24–0.77×VCC) define each address. For example, connecting A0 to 0.3×VCC selects address 62H. No external pull-up or pull-down is needed - internal biasing is absent, so precise divider design is required.
Can MP8869WGL-Z operate without an external feedback resistor divider?
Yes - in I²C-controlled mode, the FB pin is left unconnected and the output voltage is set digitally (0.6V–1.55V). The FB divider is only required for initial startup or fallback operation before I²C initialization. Once I²C takes control, VOUT is monitored directly and FB is inactive.
What is the minimum off-time specification, and why does it matter?
The minimum off-time is 185 ns. This parameter limits the maximum achievable switching frequency at low duty cycles (e.g., 0.6V output from 12V input). When the calculated off-time falls below 185 ns, the controller extends it, causing frequency droop - a key constraint when designing for high VIN/VOUT ratios.
How does the power-good (PG) pin behave during undervoltage and overvoltage faults?
PG is an open-drain output that pulls low when VOUT falls below 0.81–0.89VOUT (UV fault) or rises above 1.11–1.19VOUT (OV fault). It asserts high only when VOUT remains within the 0.86–0.94VOUT (UV OK) and 1.01–1.09VOUT (OV OK) windows simultaneously, with 30 μs deglitching to reject transients.
Does MP8869WGL-Z support pre-bias start-up?
No. The MP8869WGL-Z does not support pre-bias start-up. If the output voltage is non-zero at enable, the controller will attempt to regulate from that level, potentially causing reverse current flow through the low-side FET. External circuitry (e.g., ideal diode or MOSFET OR-ing) is required for true pre-bias tolerance.
What is the role of the VCC pin, and what capacitor value is required?
VCC is the output of an internal 3.5V LDO powered from VIN. It supplies bias to internal circuitry including the I²C block and gate drivers. A 470 nF ceramic capacitor is mandatory between VCC and PGND to ensure stability and suppress switching noise; insufficient capacitance causes erratic I²C communication or startup failure.
MP8869WGL-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.5V
- Current - Output:
- 12A
- 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)
MP8869WGL-Z FAQ
1.How can I place an order for MP8869WGL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8869WGL-Z 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 MP8869WGL-Z reliable?
The price and inventory of MP8869WGL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8869WGL-Z is usually 5 days.
3.What payment methods are accepted for MP8869WGL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8869WGL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8869WGL-Z?
MP8869WGL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8869WGL-Z 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 MP8869WGL-Z?
For technical support, including MP8869WGL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8869WGL-Z requirements.
6.How does Aetrix verify that MP8869WGL-Z is sourced from the original manufacturer or authorized distributors?
All MP8869WGL-Z 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 MP8869WGL-Z meets industry standards.
7.What is the process for return or replacement of MP8869WGL-Z?
All MP8869WGL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8869WGL-Z, 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 MP8869WGL-Z part is unused and in its original packaging.
Return procedure for MP8869WGL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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