Monolithic Power Systems Inc. MP2386GG-P

Overview

MP2386GG-P from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering 8A continuous output current with 4.5V–24V input range, 700kHz fixed switching frequency, and 105μA quiescent current. It employs adaptive constant-on-time (COT) control and DC auto-tune loop with remote differential sense for tight load/line regulation in space-constrained power rails for security cameras and portable devices.

For engineers reviewing the MP2386GG-P datasheet, MP2386GG-P pinout, MP2386GG-P application, or MP2386GG-P equivalent, key selection criteria include its QFN-11 (2mm×2mm) package, internal 34mΩ/10mΩ MOSFETs, power-good (PG) open-drain output, and support for ceramic/POSCAP output capacitors without external compensation.

Technical Context

The MP2386GG-P uses adaptive COT control to achieve fast transient response and stable operation with ceramic output capacitors, eliminating need for external compensation in most designs. Its DC auto-tune loop dynamically adjusts timing based on input/output conditions to maintain regulation across wide load and line variations.

Valley-current limiting detects overcurrent via low-side MOSFET R_DS(ON), triggering hiccup-mode protection during sustained overload. Thermal shutdown at 150°C with 25°C hysteresis and non-latching UVLO on both VIN (4.35V rising) and VCC (3.3V rising) ensure robust fault recovery in industrial environments.

Key Specifications

Pinout & Package

MP2386GG-P is housed in a thermally enhanced QFN-11 (2mm × 2mm) package with exposed thermal pad, optimized for high-power density PCB layouts requiring minimal board area and efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RTQ2132BGQW and TPS54821RHLR, MP2386GG-P delivers highest power density (8A in 2mm×2mm), best transient response via adaptive COT, and simplest implementation with no external compensation-making it optimal for space- and performance-critical embedded power rails.

Availability

MP2386GG-P is available at Aetrix Electronics and suitable for security cameras, portable XDSL devices, and flat-panel display power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2386GG-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 innovation in DC/DC converters, motor drivers, and LED controllers.

The MP2386 belongs to MPS's high-current, low-IQ buck converter product line, designed specifically for compact, thermally constrained applications such as surveillance systems, portable networking gear, and consumer displays demanding efficiency across full load range.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2386GG-P is stable with ≥22µF ceramic or POSCAP output capacitors. For 1V/8A operation, a 47µF X7R 0805 ceramic capacitor with ≤5mΩ ESR is recommended to limit output ripple to <20mV peak-to-peak under full load transients.

Does MP2386GG-P support pre-biased output startup?

Yes. When the FB node senses a pre-biased output voltage exceeding the internal reference ramp, the MP2386GG-P disables both high- and low-side switches until V_REF ramps above the sensed voltage, preventing reverse current and ensuring monotonic startup.

How is over-current protection implemented and does it latch?

MP2386GG-P uses valley-current limiting via low-side MOSFET R_DS(ON) sensing. It triggers hiccup mode-not latch-off-during sustained overload: switching pauses until output recovers, then soft-start resumes, protecting both IC and load.

Can the switching frequency be adjusted externally?

No. MP2386GG-P operates at a fixed 700kHz nominal frequency. Under large-duty-cycle conditions (VIN < 7V, VOUT > 4.2V), it automatically reduces to ~280kHz to maintain regulation-no external components or pins control frequency.

What thermal derating applies above 25°C ambient?

Using θ_JA = 34°C/W (EV2386-G-00A 4-layer board), maximum continuous power drops linearly: at 60°C ambient, PD_MAX = (150°C − 60°C)/34°C/W = 2.65W, corresponding to ~6.2A at 12V input/1V output with proper copper pour.

Is an external bootstrap capacitor required, and what value is recommended?

Yes. A 0.1µF X7R ceramic capacitor rated ≥16V must be placed between SW and BST pins. This capacitor must be located within 2mm of the IC with short, direct traces to sustain high-side gate drive under 8A load conditions.

How does the power-good (PG) signal behave during thermal shutdown?

PG is actively pulled low during thermal shutdown, OCP, OVP, UVP, or UVLO events. It remains low until the fault clears, soft-start completes, and output stabilizes within 95–115% of V_REF, providing unambiguous system-level fault indication.