Monolithic Power Systems Inc. MPM3804GG-25-P

Overview

MPM3804GG-25-P from Monolithic Power Systems is a synchronous step-down DC/DC power module integrating MOSFETs and a 1μH inductor in a QFN-10 (2mm × 2mm × 0.9mm) package. It delivers 0.6A continuous output current from 2.3V–5.5V input, regulates fixed 2.5V output with ±1% tolerance over temperature, features 2.4MHz switching frequency, and includes EN control and power-good indication. It serves as a compact, high-efficiency replacement for LDOs in space-constrained I/O rail applications.

For engineers reviewing the MPM3804GG-25-P datasheet, MPM3804GG-25-P pinout, MPM3804GG-25-P application, or MPM3804GG-25-P equivalent, key selection criteria include its fixed 2.5V output, integrated inductor, ultra-small QFN-10 footprint, 0.5ms soft-start, hiccup-mode short-circuit protection, and compatibility with low-ESR ceramic output capacitors.

Technical Context

The MPM3804GG-25-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.4MHz switching across its 2.3V–5.5V input range and 2.5V output. Its internal 120mΩ P-FET and 80mΩ N-FET enable high efficiency up to 91% while supporting 100% duty-cycle operation in dropout.

It integrates a co-packaged 1μH inductor with 0.4Ω DCR and provides open-drain power-good (PG) monitoring with ±7% trip thresholds (83% lower / 90% upper), requiring an external 100kΩ–500kΩ pull-up resistor. Thermal shutdown activates at 160°C with 30°C hysteresis.

Key Specifications

Pinout & Package

MPM3804GG-25-P is housed in an ultra-compact, thermally enhanced QFN-10 package measuring 2mm × 2mm × 0.9mm with exposed thermal pad (GND-connected). The package supports reflow soldering per MSL Level 3 and is compatible with standard 8mm carrier tape.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output step-down module applications.

Compared with TPS82084 and LTM8003-2.5, the MPM3804GG-25-P uniquely balances ultra-small 2×2mm size, 2.3V–5.5V input support, integrated PG signaling, and sub-1μA shutdown current - making it optimal for compact, battery-fed 2.5V I/O systems requiring full power management visibility.

Availability

MPM3804GG-25-P is available at Aetrix Electronics and suitable for optical transceivers, industrial sensor nodes, IoT edge gateways, and space-constrained consumer devices requiring stable component supply, rapid prototyping support, and long-term production continuity.

Supply support for MPM3804GG-25-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 power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPM3804 product line delivers fully integrated, ultra-compact power modules targeting space- and efficiency-critical applications in portable, industrial, and optical systems - emphasizing ease of use, minimal external components, and robust protection.

FAQ

What is the purpose of the PG pin on MPM3804GG-25-P?

The PG (Power Good) pin is an open-drain output that signals when the 2.5V output is within ±7% regulation (2.075V–2.25V). It requires an external pull-up resistor (100kΩ–500kΩ) to VIN. When active, PG pulls high to indicate valid regulation; during startup, fault, or undervoltage, it sinks current to ground. This enables precise power sequencing in multi-rail systems.

Can MPM3804GG-25-P operate with input voltage equal to its 2.5V output?

Yes. The MPM3804GG-25-P supports 100% duty-cycle operation, allowing it to maintain regulation even when VIN drops to 2.5V. This feature extends usable battery life in single-cell Li-ion or NiMH applications where input voltage decays below the nominal output level.

Is an external inductor required for MPM3804GG-25-P?

No. The device integrates a shielded 1μH power inductor with 0.4Ω DCR inside the QFN-10 package. No external inductor is needed - only input/output capacitors and an optional EN pull-up resistor are required for basic operation.

How does the MPM3804GG-25-P handle short-circuit conditions?

Under short-circuit, the device enters hiccup-mode protection: it disables switching, discharges the soft-start capacitor, waits ~10ms, then attempts soft restart. This cycle repeats until the fault clears. Peak switch current is limited to 1.3A, and thermal shutdown engages at 160°C to prevent damage.

What is the recommended output capacitor for MPM3804GG-25-P?

A 22μF X5R/X7R ceramic capacitor is recommended for low output ripple and stability. The device is optimized for low-ESR ceramics; using ≥10μF is sufficient for most loads, but 22μF further reduces ripple to <10mV_PP at 0.6A. Avoid high-ESR electrolytics unless paired with a 0.1μF ceramic bypass.

Does MPM3804GG-25-P require external compensation components?

No. The constant-on-time (COT) control architecture is internally compensated. No external RC networks, type-II/III compensators, or phase-margin tuning are needed - simplifying layout and ensuring stable operation across all load and input conditions.

What is the thermal performance of MPM3804GG-25-P on a standard 4-layer PCB?

With proper thermal pad soldering to a 1-in² copper pour, θ_JA is 80°C/W. At 0.6A and 5V input, typical power dissipation is ~180mW, resulting in ~14°C junction-to-ambient rise - well below the 125°C max operating temperature. No heatsink is required under these conditions.