Monolithic Power Systems Inc. MP2384GG-P

Overview

MP2384GG-P from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter delivering 4A continuous output current across a 4.5V–24V input range. It employs adaptive constant-on-time (COT) control, features 105μA quiescent current, integrates low R_DS(ON) MOSFETs (60mΩ HS / 20mΩ LS), and provides power-good indication in a QFN-11 (2mm×2mm) package-designed for compact, high-efficiency power rails in security cameras and portable electronics.

For engineers reviewing the MP2384GG-P datasheet, MP2384GG-P pinout, MP2384GG-P application, or MP2384GG-P equivalent, key selection criteria include its 700kHz fixed switching frequency, valley-current OCP with 4.5–8A trip range, dual UVP thresholds (75% & 45% V_REF), thermal shutdown at 150°C with 25°C hysteresis, and support for ceramic/POSCAP output capacitors without external ramp compensation.

Technical Context

The MP2384GG-P uses adaptive COT control with DC auto-tune loop and remote differential sensing to achieve tight line/load regulation across wide input/output conditions. Its internal architecture integrates high- and low-side MOSFETs with proprietary switching loss reduction, enabling stable operation in both PWM (CCM) and skip-mode (DCM) based on load demand.

Protection logic includes non-latching OCP (valley-current sensing), OVP (130% V_REF latch-off), dual-stage UVP (75% and 45% V_REF hiccup modes), VIN/VCC UVLO with hysteresis, and thermal shutdown with auto-retry. Output discharge (40Ω internal resistor) and soft-start (1.1–2.3ms) ensure controlled power sequencing.

Key Specifications

Pinout & Package

MP2384GG-P is housed in a thermally enhanced QFN-11 (2mm × 2mm, 0.4mm pitch) package with exposed thermal pad. Pin 1 is marked by a dot; pins 2–4 are tied internally to PGND and must be connected to a solid ground plane via multiple vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RT7297BGS and TPS54340DDAR, MP2384GG-P delivers higher output current in a smaller package with lower quiescent current and built-in protection features-making it optimal for next-generation compact, energy-sensitive consumer and industrial power rails.

Availability

MP2384GG-P is available at Aetrix Electronics and suitable for security cameras, portable XDSL devices, digital set-top boxes, and flat-panel display logic supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MP2384GG-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP2384GG-P belongs to MPS's high-efficiency, low-IQ buck converter product line-designed specifically for space-constrained, thermally sensitive applications in consumer electronics, surveillance, and broadband infrastructure where integration, reliability, and efficiency are critical.

FAQ

What is the maximum recommended PCB temperature rise for MP2384GG-P at 4A load?

At 4A output with 12V input and 3.3V output, typical case temperature rise is 25°C above ambient on a 4-layer board with 2oz copper and thermal vias to inner ground planes. Maximum junction temperature must remain below 125°C in continuous operation; derating is required above 60°C ambient unless thermal pad is fully soldered to ≥1cm² copper area.

Can MP2384GG-P operate with only ceramic output capacitors?

Yes. The MP2384GG-P includes internal ramp compensation and is explicitly characterized to remain stable with X7R/X5R ceramic capacitors down to 10μF. No external ramp capacitor is needed for standard designs using 3.3μH inductors and 22μF ceramic output caps, per Table 1 in the datasheet.

How does the valley-current OCP behave during startup with pre-biased output?

During pre-biased startup, the MP2384GG-P disables both HS and LS switches until the internal VREF ramps above the sensed FB voltage. Valley-current OCP remains inactive until soft-start completes; then normal cycle-by-cycle limiting engages. This prevents reverse current flow and ensures monotonic VOUT ramp.

What is the minimum output voltage achievable with MP2384GG-P?

The MP2384GG-P supports output voltages as low as 0.6V, set by the 600mV internal reference and external resistor divider. For 0.6V output, R2 = 10kΩ and R1 ≈ 0Ω (direct FB-to-GND connection) is valid, but layout must minimize trace resistance and noise coupling to maintain accuracy.

Is the PG pin compatible with 1.8V logic systems?

Yes. The PG pin is an open-drain output with no internal pull-up; it can be pulled up to any logic rail (1.8V, 3.3V, or 5V) via an external resistor. The output sinks current when active (low), and releases when VOUT is within 95–115% of VREF-ensuring interoperability with all common logic families.

Does MP2384GG-P support adjustable switching frequency?

No. MP2384GG-P operates at a fixed 700kHz nominal switching frequency, with tolerance of ±100kHz (600–800kHz). Frequency cannot be adjusted externally; it is determined by internal oscillator design and optimized for EMI performance and inductor size trade-offs.

What is the purpose of the AGND pin, and how should it be routed?

AGND serves as the Kelvin reference for the FB node and isolates analog sensing from noisy power ground currents. It must be routed as a dedicated trace-separate from PGND-and connected to the FB resistor divider ground node. Only one point connection to the main PGND plane is allowed, typically near the IC's thermal pad.