Monolithic Power Systems Inc. MP2386CGG-P

Overview

MP2386CGG-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 internal low R_DS(ON) MOSFETs (HS: 34mΩ, LS: 10mΩ) for high efficiency in compact power rails for security cameras and flat-panel displays.

For engineers reviewing the MP2386CGG-P datasheet, MP2386CGG-P pinout, MP2386CGG-P application, or MP2386CGG-P equivalent, key selection criteria include its QFN-11 (2mm×2mm) package, remote differential sensing capability, DC auto-tune loop, power-good (PG) open-drain output, and support for POSCAP/ceramic output capacitors without external ramp compensation.

Technical Context

The MP2386CGG-P uses adaptive COT control with internal ramp generation 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 to maintain tight load/line regulation across temperature and input voltage variations.

Valley-current over-current protection monitors the low-side MOSFET's R_DS(ON) during conduction, triggering cycle-by-cycle limiting at 7–11A. Thermal shutdown (150°C, 25°C hysteresis), OVP (130% V_REF), dual-stage UVP (75%/50% V_REF), and output discharge (40Ω) provide robust fault handling in unattended embedded systems.

Key Specifications

Pinout & Package

MP2386CGG-P is housed in a thermally enhanced QFN-11 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density layout and efficient heat dissipation in space-constrained applications such as IP camera modules and set-top box power stages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RTQ2132BGQW and TPS54821RHLR, MP2386CGG-P delivers superior load/line regulation via DC auto-tune and remote sensing, eliminates external compensation components, and achieves faster transient response using adaptive COT-reducing total BOM count and layout complexity in space-constrained consumer electronics.

Availability

MP2386CGG-P is available at Aetrix Electronics and suitable for security cameras, flat-panel televisions, digital set-top boxes, and portable XDSL devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP2386CGG-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 conversion, motor drivers, and LED lighting controllers.

The MP2386CGG-P belongs to MPS's high-efficiency, low-IQ synchronous buck converter product line, engineered specifically for compact, thermally constrained applications in surveillance, display, and broadband infrastructure where minimal external components and robust protection are mandatory.

FAQ

What is the recommended input capacitor configuration for MP2386CGG-P?

A minimum 22μF X5R/X7R ceramic capacitor rated ≥25V should be placed within 3mm of VIN and PGND pins, supplemented by a bulk electrolytic or polymer capacitor (e.g., 100μF) near the board edge. Use multiple parallel ceramics (e.g., 10μF + 4.7μF + 2.2μF) to cover high-frequency impedance dips and suppress input ripple below 50mV_pp at 8A load steps.

Does MP2386CGG-P support pre-biased output startup?

Yes. When the FB node is pre-biased above the internal reference voltage during startup, the MP2386CGG-P disables both high-side and low-side switching until V_REF ramps up past the sensed V_FB, preventing reverse current flow and ensuring monotonic output voltage rise without output capacitor stress.

How is the valley-current over-current limit triggered and recovered?

The limit activates cycle-by-cycle when inductor valley current exceeds 7–11A (temperature-dependent), measured via low-side MOSFET R_DS(ON). It does not latch off; instead, repeated limiting causes V_OUT to sag into UVP-1 (75% V_REF), initiating hiccup mode with 32μs hold-off before retry-protecting against sustained shorts while allowing recovery from momentary overload.

Can MP2386CGG-P operate stably with only ceramic output capacitors?

Yes. Its internal ramp and adaptive COT architecture provide inherent stability with ceramic output capacitors (e.g., 220μF X5R) without external compensation. External ramp (1MΩ + 220pF) is only needed if jitter exceeds design thresholds or system-level EMI requirements demand tighter V_FB slope control.

What is the thermal performance of MP2386CGG-P on a standard 4-layer PCB?

On the EV2386-G-00A 4-layer evaluation board (2oz copper, 1in² thermal pad area), MP2386CGG-P exhibits θ_JA = 34°C/W. At 8A/12V→1V (75% efficiency), power dissipation is ~3.3W, resulting in ~115°C junction rise above ambient-well within the 125°C max continuous rating when ambient ≤25°C.

How does the power-good (PG) signal behave during undervoltage events?

PG goes low immediately upon detection of V_FB < 90% V_REF after soft-start completion, or if V_FB > 115% V_REF, or during any fault (OCP, OVP, thermal shutdown, UVLO). It remains low until V_FB returns to 95–115% V_REF for >100μs, providing glitch-free sequencing for downstream processors and FPGAs.