Monolithic Power Systems Inc. MP2384CGG-Z

Overview

MP2384CGG-Z from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering 4A continuous output current with forced CCM operation, adaptive constant-on-time (COT) control, and 105μA quiescent current. It operates from 4.5V to 24V input, delivers 0.6V–13V adjustable output, and integrates low-R_DS(ON) MOSFETs (60mΩ HS / 20mΩ LS) in a QFN-11 (2mm×2mm) package for compact power delivery in space-constrained security cameras and portable devices.

For engineers reviewing the MP2384CGG-Z datasheet, MP2384CGG-Z pinout, MP2384CGG-Z application, or MP2384CGG-Z equivalent, key selection criteria include its 700kHz fixed switching frequency, 1% reference voltage accuracy, DC auto-tune loop with remote sense, power-good (PG) open-drain output, and comprehensive protection suite (OCP/OVP/UVP/thermal shutdown with auto-retry).

Technical Context

The MP2384CGG-Z implements adaptive COT control with internal ramp compensation, enabling fast transient response without external loop compensation while maintaining stability with ceramic or POSCAP output capacitors. Its DC auto-tune loop dynamically adjusts on-time based on line and load conditions, and remote differential sensing improves regulation accuracy under high-current PCB trace impedance.

It operates exclusively in forced PWM mode (no diode emulation), eliminating audible noise and ensuring consistent EMI behavior across load range. The valley-current OCP uses internal MOSFET R_DS(ON) sensing, and hiccup-mode recovery is triggered upon sustained UVP-1 (75% V_REF) or UVP-2 (50% V_REF) faults.

Key Specifications

Pinout & Package

MP2384CGG-Z is housed in a thermally enhanced QFN-11 (2mm × 2mm, 0.4mm pitch) package with exposed thermal pad. Pin 1 is marked by dot; top-side marking reads "JZ" followed by year/lot code. Package complies with JEDEC MO-220, MSL Level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2384DGQ-Z, MP2384CGG-Z saves 75% PCB area but trades ~3°C higher junction temperature at 4A; versus RT7295BGJ8F, it delivers superior line/load regulation and eliminates external compensation, reducing design cycle time by ~2 weeks.

Availability

MP2384CGG-Z is available at Aetrix Electronics and suitable for security cameras, portable XDSL modems, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2384CGG-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 20 years of expertise in DC-DC conversion, motor drivers, and LED lighting controllers.

The MP2384C product line targets compact, high-efficiency point-of-load regulation in space- and thermal-constrained applications such as surveillance equipment and broadband access devices, emphasizing low I_Q, integrated power stages, and robust protection.

FAQ

What is the minimum recommended output capacitor for stable operation?

The MP2384CGG-Z is stable with ≥44μF POSCAP or ≥66μF ceramic output capacitance (X5R/X7R). For 3.3V/4A operation, the typical design uses two 33μF 0805 X7R ceramics in parallel. Lower values risk instability under heavy load transients due to insufficient energy storage and phase margin erosion.

Can the MP2384CGG-Z operate with an input voltage below 4.5V?

No - the absolute minimum VIN is 4.5V per datasheet specifications. Below this, the internal VCC LDO cannot regulate, causing erratic switching or complete shutdown. The VIN UVLO rising threshold is 4.35V (typical), with 550mV hysteresis, so operation below 3.8V is prohibited.

How does the valley-current OCP respond during short-circuit events?

During short-circuit, the valley-current limit triggers every cycle, holding the HS-FET off. Inductor current decays to zero, then the LS-FET remains on until current reaches zero, entering hiccup mode after ~32μs of sustained UVP-1 condition. Recovery occurs automatically once fault clears and V_FB rises above 75% V_REF.

Is external ramp compensation required for ceramic output capacitors?

No - the MP2384CGG-Z includes internal ramp compensation and is stable with standard ceramic output capacitors (e.g., 66μF X7R). External ramp (1MΩ + 220pF) is only needed if jitter exceeds system noise immunity requirements or if instability appears in lab testing with specific capacitor ESR/ESL.

What is the maximum allowable PCB trace length between AGND and PGND?

AGND and PGND must be connected at a single point near the IC's thermal pad using a low-inductance path - ideally a direct 0.5mm-wide copper bridge under the package. Separation beyond 2mm introduces noise coupling into the FB loop, degrading regulation accuracy and potentially causing oscillation.

Does the MP2384CGG-Z support pre-biased output startup?

Yes - when the output is pre-biased, the MP2384CGG-Z disables both HS and LS switches until the internal V_REF ramp exceeds the sensed V_FB. This prevents reverse current flow and ensures monotonic startup without output voltage overshoot or inrush into charged downstream capacitance.

What thermal derating applies at 85°C ambient temperature?

At T_A = 85°C, the maximum continuous output current is reduced to ~3.2A (derated from 4A at 25°C) based on θ_JA = 34°C/W and T_J(MAX) = 150°C. This assumes 4-layer PCB with 64mm×64mm copper area; actual derating depends on heatsinking and airflow.