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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP8860GQ-0000-Z

Name: MP8860GQ-0000-Z
Brand: Monolithic Power Systems Inc.
SKU: MP8860GQ-0000-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP8860GQ-0000-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerVFQFN

Datasheet:: MP8860GQ-0000-Z.pdf

Description:: IC REG BUCK BOOST ADJ 1A 16QFN

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Product details

Overview

MP8860GQ-0000-Z from Monolithic Power Systems is a synchronous 4-switch integrated buck-boost DC/DC converter with I²C interface, operating from 2.8V to 22V input and delivering up to 1A output current at programmable 1V–20.47V output voltage (5V default). It features constant-on-time (COT) buck control, constant-off-time boost control, 500kHz switching frequency, and internal MOSFETs with R_DS(ON) as low as 42mΩ (LS) and 50mΩ (HS), enabling high-efficiency power regulation in motor supplies and industrial bus systems.

For engineers reviewing the MP8860GQ-0000-Z datasheet, MP8860GQ-0000-Z pinout, MP8860GQ-0000-Z application, or MP8860GQ-0000-Z equivalent, this device supports I²C-programmable output voltage (10mV resolution), adjustable constant-current limit, soft-start timing (900μs), line-drop compensation, and hiccup-mode OVP/SCP - critical for embedded power design requiring dynamic load response and fault resilience.

Technical Context

The MP8860 implements dual-mode control architecture: COT regulation in buck mode ensures fast load transient response when V_IN > V_OUT, while constant-off-time control in boost mode maintains stability during V_IN < V_OUT. Seamless buck-boost transition occurs near V_IN ≈ V_OUT, avoiding discontinuous operation zones.

Its 4-MOSFET topology integrates two half-bridges (SW1/BST1 and SW2/BST2), enabling bidirectional energy transfer through a single inductor. The I²C interface controls all key parameters-including OTP-stored configuration, four selectable slave addresses via ADD pin, and real-time monitoring of faults via ALT alert output-making it suitable for closed-loop power management in resource-constrained systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.8V to 22V - supports wide-input industrial and automotive battery-supplied systems without external pre-regulation.
Output Voltage Range	1V to 20.47V (I²C-programmable, 10mV step) - enables precise rail generation for mixed-voltage SoCs and sensors.
Max Output Current	1A continuous (V_OUT = 5V) - sufficient for powering microcontrollers, displays, and motor drivers in compact designs.
Switching Frequency	500kHz fixed - balances efficiency, EMI, and inductor size; decreases below 3V V_OUT per datasheet note.
Internal MOSFET R_DS(ON)	HS: 50–80mΩ, LS: 42–70mΩ - reduces conduction loss and thermal stress in QFN-16 package.
I²C Interface Speed	Up to 3.4MHz - allows rapid configuration updates and telemetry reads during system runtime.
Thermal Shutdown	150°C rising threshold with 20°C hysteresis - prevents permanent damage under sustained overload or poor PCB thermal design.

Pinout & Package

MP8860GQ-0000-Z is housed in a thermally enhanced 16-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin numbering follows standard top-view layout; GND pins (2, 11) and AGND (10) require dedicated low-impedance copper planes for noise immunity and thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Main power input	Accepts 2.8–22V supply; connects directly to drain of internal HS-FETs; requires local 100µF ceramic + bulk capacitor.
3 EN	Enable control	Active-high logic input with 2MΩ internal pull-down; 1.1V typical turn-on threshold enables simple microcontroller GPIO control.
4 ADD	I²C address select	Resistor-divider programmable to set one of four I²C slave addresses (69H–6FH); enables multi-device bus sharing.
5 SCL / 6 SDA	I²C serial interface	Supports standard/fast-mode I²C up to 3.4MHz; compatible with 1.8V–5V logic levels on pull-up side.
7 OC	Constant-current limit set	Analog input for external resistor to configure output current limit (e.g., 21.5kΩ → 2A limit).
8 ALT	Fault alert output	Open-drain active-low signal indicating OVP, SCP, OCP, or thermal warning; sinks 4mA at 0.4V.
9 VCC	Internal LDO output	3.6V regulated supply for internal circuitry; requires 1µF decoupling capacitor close to pin.
12 OUT	Power output	Delivers regulated V_OUT; must be routed with low-inductance path to output capacitors and load.
13 BST2 / 16 BST1	Bootstrap supplies	Drive floating gate voltages for high-side MOSFETs; each requires 0.1µF ceramic capacitor between BSTx and SWx.
14 SW2 / 15 SW1	Switching nodes	Connect to inductor terminals; high dv/dt nodes demanding tight loop layout and ground stitching.

Key Features

Feature	Design Value
Four internal low-R_DS(ON) MOSFETs	Eliminates need for external switches and gate drivers, reducing BOM count and PCB area by ~30% vs discrete solutions.
I²C-programmable output voltage & CC limit	Enables dynamic rail adjustment and current limiting without hardware changes - ideal for firmware-upgradable power domains.
OTP non-volatile memory	Stores factory-default settings (5V V_OUT, forced PWM, 900μs soft-start); eliminates boot-time I²C initialization in production units.
Hiccup-mode OVP/SCP protection	Auto-retries after fault clearance instead of latching off, maintaining system availability during transient overloads or shorts.
EN-controlled output discharge	Actively pulls V_OUT to GND when disabled (R_DIS = 60–100Ω), preventing back-powering of downstream circuits.

Applications

Power Supply for Motor

Buck-Boost Bus Supplies

Use Scenario: Driving small DC motors or stepper coil drivers in portable medical devices where battery voltage drops from 18V (fresh Li-ion pack) to 3V (deep discharge).

IC Role / Device Role / Timing Role: Regulates stable 5V/12V motor driver rail across full battery range using seamless buck-boost transition.

Use Value: Maintains consistent torque and speed control without brownouts or manual rail switching, extending usable battery life by 18% vs fixed-buck converters.

Use Scenario: Providing isolated 9V and 15V rails for industrial fieldbus transceivers (RS-485, CAN) powered from unregulated 12V vehicle or PLC supply.

IC Role / Device Role / Timing Role: Acts as primary bus regulator with I²C-adjustable V_OUT to compensate for cable voltage drop in long-haul installations.

Use Value: Line-drop compensation eliminates need for remote sensing wires, reducing connector pin count and assembly cost by 22%.

Industrial Systems

Personal Medical Products

Use Scenario: Powering FPGA I/O banks and ADC reference supplies in modular test equipment with variable AC-DC adapter inputs (9–24V).

IC Role / Device Role / Timing Role: Delivers low-noise, tightly regulated 1.8V/3.3V outputs with <±1.5% accuracy and <20mV ripple under 1A load steps.

Use Value: Meets FPGA vendor's strict power sequencing and transient response requirements (<100μs recovery), avoiding configuration failures.

Use Scenario: Supplying imaging sensor and display subsystems in handheld ultrasound probes powered by 2-cell Li-ion (6–8.4V nominal).

IC Role / Device Role / Timing Role: Generates 5V for CMOS image sensor and 3.3V for OLED controller with independent soft-start to prevent inrush-induced reset.

Use Value: I²C-configurable startup timing and fault reporting enable FDA-compliant self-test logging without additional supervisory ICs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TI TPS63020DSJR	3.2–13.2V input; 1.2–5.5V output; no I²C interface; 2A output; fixed 2.5MHz switching.	Lacks programmability and wide VIN range; suited for space-constrained consumer electronics, not industrial bus regulation.	Select when board area is critical and output voltage is static; avoid if dynamic I²C control or >13.2V input is required.
Analog Devices LT8390AEMSE#PBF	4–60V input; 0.8–60V output; 3.5A output; SPI interface; external MOSFETs required.	Higher power and voltage capability but increases BOM complexity and layout effort; no integrated FETs.	Choose for >1A loads or >22V inputs; only if design can accommodate external power stage and SPI firmware overhead.

Compared with TPS63020DSJR and LT8390AEMSE#PBF, MP8860GQ-0000-Z uniquely combines wide 2.8–22V input, I²C configurability, integrated 4-switch topology, and 1A capability in a 3×3mm QFN - making it optimal for mid-power industrial and medical systems needing firmware-adaptable, compact, and robust power conversion.

Availability

MP8860GQ-0000-Z is available at Aetrix Electronics and suitable for industrial bus supplies, motor drive power stages, personal medical imaging subsystems, and DSLR camera auxiliary rails requiring stable component supply across extended temperature ranges (-40°C to +125°C).

Supply support for MP8860GQ-0000-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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED controllers.

The MP8860 belongs to MPS's integrated buck-boost converter product line, designed specifically for applications requiring seamless voltage regulation across wide input ranges - especially where space, thermal constraints, and digital configurability are critical.

FAQ

What is the default output voltage and how is it set?

The MP8860GQ-0000-Z ships with OTP-programmed default output voltage of 5.0V ±1.5%, stored in non-volatile memory. This value is loaded at power-up without I²C communication. Users may reprogram V_OUT via I²C commands to any value from 1.000V to 20.470V in 10mV increments, with new settings retained until next OTP write.

Does the device support automatic mode transitions between buck, boost, and buck-boost?

Yes - the MP8860 uses proprietary control logic that automatically selects buck mode when V_IN > V_OUT + margin, boost mode when V_IN < V_OUT – margin, and buck-boost mode near V_IN ≈ V_OUT. Transitions occur seamlessly without output glitches or external intervention, verified in load transient testing at 150mA/μs slew rates.

How is over-current protection implemented and what are the response options?

OCP is implemented via internal current-sensing MOSFET and configurable OC pin resistor. Protection triggers at user-defined current limit (e.g., 2A with 21.5kΩ), and responds in hiccup mode - cycling on/off with ~10ms off-time - unless configured otherwise via I²C. Latch-off mode is also available for safety-critical applications requiring hard shutdown.

Can the MP8860GQ-0000-Z operate with input voltages below 3V?

No - the absolute minimum input voltage is 2.8V per datasheet specifications, and guaranteed operation begins at 2.8V. Below 3V output, switching frequency decreases per Note 1, but input operation below 2.8V risks UVLO activation (VIN_UVLO rising threshold = 2.65V typical) and undefined behavior. Input must remain ≥2.8V for reliable regulation.

What thermal performance can be expected in a standard 4-layer PCB layout?

On a 4-layer JEDEC-standard board (64mm × 64mm), θ_JA is 26°C/W. At 1A output into 5V with 12V input and forced PWM mode, typical thermal rise is ≤8°C above ambient at 25°C, rising to ~10°C at 85°C ambient. Full derating applies above 125°C junction temperature, where thermal shutdown activates at 150°C.

Is the ALT pin actively driven during normal operation?

No - the ALT pin remains high-impedance (open-drain) during normal operation. It pulls low only during fault conditions: OVP (≥160% V_REF), SCP (output short), OCP (exceeds programmed limit), or thermal warning (T_J ≥ 130°C). Its 4mA sink capability allows direct connection to microcontroller interrupt pins without external pull-up resistors.

How does the I²C interface handle multiple MP8860 devices on the same bus?

Four unique I²C slave addresses (69H, 6BH, 6DH, 6FH) are selected via resistor divider on the ADD pin. Each device must use a distinct address; simultaneous writes to identical addresses will cause bus contention. Address selection is hardware-configured at power-up and cannot be changed dynamically via I²C.

MP8860GQ-0000-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 16-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up/Step-Down

Output Configuration:: Positive

Topology:: Buck-Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.8V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 1V

Voltage - Output (Max):: 20.47V

Current - Output:: 1A

Frequency - Switching:: 530kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x3)

MP8860GQ-0000-Z FAQ

1.How can I place an order for MP8860GQ-0000-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP8860GQ-0000-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 MP8860GQ-0000-Z reliable?

The price and inventory of MP8860GQ-0000-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8860GQ-0000-Z is usually 5 days.

3.What payment methods are accepted for MP8860GQ-0000-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8860GQ-0000-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP8860GQ-0000-Z?

MP8860GQ-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP8860GQ-0000-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 MP8860GQ-0000-Z?

For technical support, including MP8860GQ-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8860GQ-0000-Z requirements.

6.How does Aetrix verify that MP8860GQ-0000-Z is sourced from the original manufacturer or authorized distributors?

All MP8860GQ-0000-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 MP8860GQ-0000-Z meets industry standards.

7.What is the process for return or replacement of MP8860GQ-0000-Z?

All MP8860GQ-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8860GQ-0000-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 MP8860GQ-0000-Z part is unused and in its original packaging.

Return procedure for MP8860GQ-0000-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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