Monolithic Power Systems Inc. MP2384CGG-P

Overview

MP2384CGG-P from Monolithic Power Systems is a 4.5V–24V input, 4A synchronous buck converter with adaptive constant-on-time (COT) control, forced continuous conduction mode (CCM), 105μA quiescent current, and integrated 60mΩ/20mΩ MOSFETs in a QFN-11 (2mm×2mm) package. It delivers stable 3.3V/4A output for security camera power rails with remote differential sensing and DC auto-tune loop for ±1% load regulation.

For engineers reviewing the MP2384CGG-P datasheet, MP2384CGG-P pinout, MP2384CGG-P application, or MP2384CGG-P equivalent, key selection criteria include its 700kHz fixed switching frequency, power-good (PG) open-drain indicator, internal soft-start timing (1.7ms typ), output discharge function, and thermal shutdown with 25°C hysteresis - all critical for compact, high-reliability embedded power designs.

Technical Context

The MP2384CGG-P 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 to achieve <±0.5% line regulation and <±1% load regulation across 0–4A.

It operates exclusively in forced PWM mode (no diode emulation), eliminating low-load efficiency dropouts and ensuring consistent EMI profile. The valley-current OCP uses low-side R_DS(ON) sensing (20mΩ) with 4.5–8A trip range, and UVP/OVP thresholds are referenced to 1% accurate 600mV internal V_REF, not external dividers.

Key Specifications

Pinout & Package

MP2384CGG-P 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 marking "JZ" confirms MP2384CGG-P variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2384DGQ-P, MP2384CGG-P offers 12% smaller footprint and 15°C/W lower θ_JA for identical thermal performance in space-constrained designs; versus TPS54340DDAR, it delivers 33× lower I_Q, integrated PG, and ceramic-capable COT control - making it superior for always-on, compact, low-noise applications.

Availability

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

Supply support for MP2384CGG-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, founded in 1997 and headquartered in Kirkland, Washington.

The MP2384C product line targets compact, high-efficiency DC/DC conversion for space- and thermal-constrained consumer and industrial equipment, emphasizing low I_Q, forced CCM, and integrated protection for reliable unattended operation.

FAQ

What is the maximum allowable input voltage for MP2384CGG-P?

The absolute maximum VIN rating is 26V DC. Operation above 24V violates the recommended operating condition and risks premature failure due to overstress on internal MOSFETs and gate drivers. Sustained 24V input is supported with proper thermal design and input capacitance.

Does MP2384CGG-P support adjustable output voltage?

Yes - output voltage is set externally via a resistor divider from VOUT to AGND, connected to the FB pin. For 3.3V output, use R1 = 40.2kΩ and R2 = 8.87kΩ (per datasheet Table 1). The 600mV reference allows outputs from 0.6V to 13V using standard 1% resistors.

How does the power-good (PG) pin behave during startup and fault conditions?

PG is an open-drain output pulled low during soft-start and remains low until VOUT reaches 95% of target (e.g., 3.135V for 3.3V). It goes high only after soft-start completes and VOUT stays within 95–115% of VREF. PG pulls low instantly on OVP, UVP, OCP, thermal shutdown, or EN UVLO.

Can MP2384CGG-P operate with only ceramic output capacitors?

Yes - its adaptive COT architecture with internal ramp compensation ensures stability with X5R/X7R ceramic capacitors alone. No external ramp or type-II compensation is needed for standard 3.3V/5V outputs. Feed-forward capacitor C4 (33pF–1nF) further improves transient response.

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

AGND is the Kelvin reference for the FB amplifier and must be connected directly to the local ground near the FB resistor divider - not to the main PGND plane. It isolates sensitive analog feedback from high-current power ground noise, enabling accurate remote sensing and ±0.5% load regulation.

Is output discharge active during EN-driven shutdown?

Yes - output discharge activates whenever the IC disables switching due to EN low, UVP, OVP, OCP, VIN UVLO, or thermal shutdown. The internal 6Ω discharge path actively bleeds the output capacitor, reducing VOUT to <100mV within 10ms for 66μF load - critical for safe hot-swap and sequencing.

What thermal performance can be expected on a standard 4-layer PCB?

On the EV2384C-G-00A evaluation board (4-layer, 64mm×64mm), MP2384CGG-P achieves 30°C case temperature rise at 4A/12V input. With θ_JA = 34°C/W, junction temperature stays below 125°C up to 4A at 25°C ambient - meeting industrial reliability requirements without forced airflow.