My Inquiry
My Account
Monolithic Power Systems Inc. MP8865GQ-Z
- Part No.:
- MP8865GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 15-PowerVFQFN
- Datasheet:
-
MP8865GQ-Z.pdf
- Description:
- IC REG BUCK PROG 6A 15QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP8865GQ-Z from Monolithic Power Systems is a high-efficiency, 6A, 21V synchronous step-down DC/DC converter with I²C programmability. It integrates 45mΩ/18mΩ MOSFETs, delivers 1% output voltage accuracy, supports 0.6V–1.87V output adjustment in 10mV steps, and operates across 4.5V–21V input. It serves as the primary core voltage regulator for SoC power rails in media processors and embedded systems.
For engineers reviewing the MP8865GQ-Z datasheet, MP8865GQ-Z pinout, MP8865GQ-Z application, or MP8865GQ-Z equivalent, key selection criteria include I²C-configurable slew rate and switching frequency (600kHz default), hiccup-mode over-current protection, thermal shutdown at 160°C, and QFN-15 3mm×3mm package compatibility with high-density PCB layouts.
Technical Context
The MP8865GQ-Z employs current-mode control with internal compensation, enabling fast transient response and stable loop behavior without external compensation components. Its three operating modes-AAM (light-load), DCM, and CCM-are dynamically selected based on load current and MODE register setting via I²C.
I²C interface operates at up to 3.4Mbps (high-speed mode) with dual address support (ADD pin configurable), supporting real-time VOUT scaling, power-saving mode enable/disable, and fault status readback. The integrated 5V LDO (VCC) powers internal circuitry and requires a 0.22μF ceramic decoupling capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports wide industrial and automotive input rails including 12V nominal systems. |
| Continuous Output Current | 6A - sufficient for powering multi-core SoCs and FPGA core rails without external current sharing. |
| Output Voltage Range | 0.6V to 1.87V in 10mV steps - enables precise core voltage tuning for dynamic DVFS in processors. |
| Feedback Accuracy | ±1% at TJ = 25°C - ensures tight regulation under varying thermal and load conditions. |
| Switching Frequency | Default 600kHz, I²C-selectable - balances efficiency vs. size; higher frequencies reduce inductor volume. |
| Thermal Shutdown Threshold | 160°C with 20°C hysteresis - protects against sustained overload while allowing brief peak power bursts. |
| I²C Interface Speed | Up to 3.4Mbps - enables rapid voltage transitions during performance state changes in real-time systems. |
Pinout & Package
MP8865GQ-Z is housed in a thermally enhanced QFN-15 (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 is located at the top-left corner adjacent to the marking dot; the package requires solder paste stencil design per MPS AN-031 guidelines for optimal thermal performance and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Primary input supply rail | Accepts 4.5V–21V; requires low-ESR ceramic input capacitor and wide copper pour for high di/dt handling. |
| 2,8 PGND | Power ground reference | Return path for high-current switch node; must be connected directly to thermal pad and separated from AGND. |
| 3 EN/SYNC | Enable and external clock sync input | Active-high digital control; internal 1MΩ pull-down; supports synchronization to 300kHz–2MHz external clocks. |
| 4 PG | Open-drain power-good indicator | Signals valid regulation after soft-start (80μs delay); pulled low during UVLO, OCP, or TSD events. |
| 5 SDA | I²C bidirectional data line | HS-mode capable (3.4Mbps); requires external pull-up; supports multi-device bus configuration. |
| 6 SCL | I²C clock input | Master-generated clock; compatible with standard and fast-mode I²C peripherals and controllers. |
| 7 ADD | I²C address select | Floating or pulled to VCC → address 0x60; pulled to GND → address 0x61; enables dual-device configuration. |
| 9 SW | Switch node output | Connects to inductor; high dv/dt node requiring minimized trace area and guard ring layout. |
| 10 BST | Bootstrap supply for high-side driver | Requires 10Ω resistor + 0.1μF ceramic capacitor between BST and SW for reliable gate drive. |
| 11 VOUT | I²C control loop output sense | Direct connection to regulated output; used instead of FB when I²C control mode is active (V_BOOT=0). |
| 12 FB | Feedback input for resistor-divider regulation | Connects to resistor divider tap; sets VOUT when I²C control is disabled or during startup before I²C initialization. |
| 13 SS | Soft-start timing capacitor node | 12μA internal current source charges external capacitor; determines monotonic ramp time to avoid inrush current. |
| 14 VCC | Internal 5V LDO output | Supplies internal logic and I²C block; requires 0.22μF ceramic decoupling; not intended for external loads. |
| 15 AGND | Analog signal ground | Separate from PGND; connects to system ground only at single point near FB/SS pins to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-programmable output voltage | 0.6V–1.87V in 10mV increments with controlled slew rate - enables dynamic voltage scaling for power-aware SoC operation. |
| Integrated 45mΩ/18mΩ MOSFETs | Eliminates external power switches and reduces BOM count; achieves >92% efficiency at 12VIN/1.2VOUT/3A. |
| Hiccup-mode over-current protection | Enters periodic restart on sustained short-circuit - limits average power dissipation and prevents thermal runaway. |
| Pre-bias start-up capability | Monotonically ramps output even when VOUT is pre-charged - avoids reverse current flow into powered-down downstream circuits. |
| Power-good (PG) with 80μs deglitch | Provides clean system reset signaling; asserts only after stable regulation and de-asserts within 80μs of fault detection. |
Applications
| SoC Core Voltage Regulation | Media Processor Power Management |
|---|---|
|
Use Scenario: Supplying 1.0V–1.2V core rail to ARM-based application processors (e.g., i.MX8, RK3399) under dynamic DVFS load profiles. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with I²C-controlled VOUT scaling synchronized to CPU frequency transitions. Use Value: Enables sub-100μs voltage transitions matching processor P-state entry/exit, reducing idle power by up to 35%. |
Use Scenario: Powering video codec and GPU subsystems in set-top boxes and smart displays requiring precise 1.1V/1.35V rails. IC Role / Device Role / Timing Role: High-current, low-noise DC/DC converter with soft-start and PG signaling for sequenced power-up. Use Value: Prevents display artifacts during boot via monotonic start-up and eliminates brown-out resets using 1% VOUT accuracy. |
| Distributed Power Architecture | Industrial Embedded Control |
|
Use Scenario: Local point-of-load conversion in modular PLC backplanes where 24V bus is stepped down to 1.8V/3.3V for FPGA I/O banks. IC Role / Device Role / Timing Role: Compact, thermally robust POL regulator with I²C telemetry for remote health monitoring. Use Value: Reduces board space by 40% vs. discrete controller+MOSFET solutions while enabling real-time fault logging via I²C registers. |
Use Scenario: Powering ARM Cortex-M7 microcontrollers and CAN transceivers in harsh-environment motor drives with 12V/24V input. IC Role / Device Role / Timing Role: Input-robust buck converter with UVLO (4.0V rising threshold) and thermal shutdown (160°C). Use Value: Ensures reliable operation across automotive cold-crank (4.5V min) and hot-idle (21V max) conditions without derating. |
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 |
|---|---|---|---|
| RTQ2132BGQW | 4A rated, 2.7V–18V input, no I²C interface, fixed 600kHz fSW | Lacks dynamic voltage scaling; suitable only for static-output applications like memory rails. | Select when I²C control is unnecessary and cost sensitivity outweighs programmability needs. |
| TPS546B24RVFR | 6A, 4.5V–18V, PMBus 1.3 interface, 0.5% VREF accuracy, integrated telemetry | Supports full telemetry (IOUT, VOUT, TDIE) but requires PMBus protocol stack and larger footprint. | Select for server-grade telemetry requirements where PMBus infrastructure already exists. |
Compared with RTQ2132BGQW and TPS546B24RVFR, MP8865GQ-Z uniquely balances I²C programmability, compact QFN-15 packaging, and 6A capability - making it optimal for space-constrained, DVFS-enabled embedded systems where PMBus complexity is unjustified.
Availability
MP8865GQ-Z is available at Aetrix Electronics and suitable for SoC core voltage regulation, media processor power management, and distributed power systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MP8865GQ-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP8865 belongs to MPS's high-efficiency, I²C-programmable DC/DC converter product line, engineered specifically for dynamic voltage scaling in advanced SoC and media processor platforms.
FAQ
What is the minimum recommended soft-start capacitor value for MP8865GQ-Z?
The soft-start capacitor (CSS) is charged by a 12μA internal current source. For a typical 5ms ramp time to 1.2V, use CSS = (5ms × 12μA) / 0.6V ≈ 100nF. Larger values (e.g., 220nF) extend ramp time to prevent inrush current in high-capacitance output designs.
Can MP8865GQ-Z operate with an input voltage below 4.5V?
No. The absolute minimum input voltage is 4.5V per the Recommended Operating Conditions table. Below this, the internal 5V LDO cannot regulate, causing failure of the gate drivers and I²C interface. The UVLO rising threshold is 4.0V, but stable operation requires ≥4.5V.
How does the ADD pin affect I²C addressing on MP8865GQ-Z?
The ADD pin selects between two I²C slave addresses: floating or tied to VCC configures address 0x60; tied to GND configures address 0x61. This allows two MP8865GQ-Z devices on the same bus, enabling dual-rail sequencing or redundancy without address conflict.
Is external compensation required for MP8865GQ-Z's control loop?
No. The MP8865GQ-Z features an optimized internal compensation network designed for stability with standard 1μH inductors and ceramic output capacitors. External compensation components are not supported or required - simplifying layout and reducing BOM count.
What happens during pre-biased start-up when VOUT is already at 1.2V?
The MP8865GQ-Z performs monotonic start-up: the internal soft-start capacitor charges until its voltage exceeds the sensed VOUT (at FB or VOUT pin). Only then does the high-side FET turn on, preventing reverse current flow and ensuring no output voltage droop or overshoot occurs.
Does the PG pin respond to output over-voltage events?
No. The PG pin is asserted only based on feedback voltage thresholds (90% and 70% of VREF) and fault conditions (UVLO, OCP, TSD). Output over-voltage protection (OVP) actively discharges the rail via the low-side FET but does not trigger PG assertion or de-assertion.
What is the maximum allowable BST capacitor voltage rating?
The BST-to-SW voltage must not exceed 5.5V per Absolute Maximum Ratings. A 6.3V or 10V X5R/X7R ceramic capacitor (e.g., 0.1μF) is recommended to ensure margin against ringing and bootstrap pump overshoot during high-frequency switching.
MP8865GQ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 15-PowerVFQFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.87V
- Current - Output:
- 6A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-QFN (3x3)
MP8865GQ-Z FAQ
1.How can I place an order for MP8865GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8865GQ-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 MP8865GQ-Z reliable?
The price and inventory of MP8865GQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8865GQ-Z is usually 5 days.
3.What payment methods are accepted for MP8865GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8865GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8865GQ-Z?
MP8865GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8865GQ-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 MP8865GQ-Z?
For technical support, including MP8865GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8865GQ-Z requirements.
6.How does Aetrix verify that MP8865GQ-Z is sourced from the original manufacturer or authorized distributors?
All MP8865GQ-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 MP8865GQ-Z meets industry standards.
7.What is the process for return or replacement of MP8865GQ-Z?
All MP8865GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8865GQ-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 MP8865GQ-Z part is unused and in its original packaging.
Return procedure for MP8865GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP8865GQ-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
