Monolithic Power Systems Inc. MP8862GQ-0000-Z

Overview

MP8862GQ-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 2A output current at programmable 1V–20.47V output voltage. It uses COT control in buck mode and COT-derived constant-off-time in boost mode for fast transient response across buck, boost, and seamless buck-boost transitions. Designed for industrial bus supplies and DSLR camera power rails, it integrates four low-R_DS(ON) MOSFETs and supports forced PWM or auto PFM/PWM operation.

For engineers reviewing the MP8862GQ-0000-Z datasheet, MP8862GQ-0000-Z pinout, MP8862GQ-0000-Z application, or MP8862GQ-0000-Z equivalent, key selection criteria include its 500kHz switching frequency, I²C-programmable output voltage (10mV resolution), adjustable constant-current limit, hiccup-mode OVP/SCP protection, and OTP-configurable soft-start and line-drop compensation - all in a thermally enhanced 3mm×3mm QFN-16 package.

Technical Context

The MP8862 implements dual-mode control: constant-on-time (COT) regulation in buck mode ensures rapid load-step response, while constant-off-time behavior in boost mode maintains stability near V_IN ≈ V_OUT. Its 4-switch topology enables continuous conduction across the full input range without mode-hopping artifacts.

Internal architecture includes an integrated 3.65V LDO (VCC), dual bootstrap regulators (BST1/BST2), analog ground (AGND) separation, and I²C slave logic supporting four address configurations via the ADD pin. Fault signaling occurs through the open-drain ALT pin, which asserts low on over-temperature warning, OCP, OVP, or SCP events.

Key Specifications

Pinout & Package

MP8862GQ-0000-Z is housed in a thermally optimized 16-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high-power density designs and requires proper PCB copper pour and vias under the pad for junction-to-board thermal resistance of 3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS63020DSJR and LT8390AEMSE#PBF, MP8862GQ-0000-Z uniquely combines wide 2.8V–22V input, I²C-based real-time voltage/current tuning, OTP-stored defaults, and integrated line-drop compensation - making it optimal for compact, software-configurable, mid-power embedded systems requiring field adaptability and design reuse.

Availability

MP8862GQ-0000-Z is available at Aetrix Electronics and suitable for industrial control systems, DSLR camera power rails, personal medical devices, and wide-input bus supplies requiring stable component supply across production lifecycles.

Supply support for MP8862GQ-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 expertise in DC/DC conversion, LED drivers, and motor control solutions since 1997.

The MP8862 belongs to MPS's integrated buck-boost converter product line, designed specifically for space-constrained, software-defined power systems needing seamless voltage regulation across wide input ranges and runtime configurability via digital interfaces.

FAQ

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

The MP8862GQ-0000-Z ships with OTP-programmed default output voltage of 5.0V ±1.5%, set at factory. This value can be changed in real time via I²C commands to any value from 1.000V to 20.470V in 10mV increments, or permanently stored in OTP using MPS's programming tools and EVKT-MP8862 evaluation kit.

Does MP8862GQ-0000-Z support both buck and boost modes simultaneously?

No - it operates in buck, boost, or buck-boost mode depending on instantaneous VIN/VOUT relationship, but always uses a single unified 4-switch topology. When VIN > VOUT, it behaves as a buck converter; when VIN < VOUT, as a boost; and when VIN ≈ VOUT, it dynamically interleaves switch states to maintain regulation without discontinuous transitions.

How does the I²C interface handle address conflicts in multi-device systems?

The MP8862 supports four unique I²C slave addresses (69H, 6BH, 6DH, 6FH) selected by analog voltage on the ADD pin using resistor dividers. This eliminates address collisions in systems with multiple MP8862 units, enabling independent configuration of each device without hardware modifications.

What thermal protection mechanisms are implemented?

The device features over-temperature warning (ALT pin assertion at ~130°C) and thermal shutdown (hard disable at 150°C ±20°C). After shutdown, it remains off until junction temperature falls by ≥20°C hysteresis, then auto-restarts if EN remains high - preventing latch-up during sustained overload conditions.

Can the MP8862GQ-0000-Z drive a 4.7µH inductor at full 2A load continuously?

Yes - the datasheet specifies validated operation with a 4.7µH inductor (DCR = 19.5mΩ) delivering 2A continuously at 12V input and 5–20V output in forced PWM mode. Thermal rise remains ≤12°C at 2A/25°C ambient on a 4-layer EV8862-Q-00A board, confirming reliable full-load operation with appropriate PCB layout.

Is output discharge enabled by default and how is it controlled?

Yes - output discharge is enabled by default and activated automatically when EN is pulled low. An internal 60–100Ω NMOS discharges VOUT to GND, reducing residual voltage within milliseconds. Discharge can be disabled via I²C register bit to preserve hold-up time in systems requiring graceful shutdown sequences.