Monolithic Power Systems Inc. MPM3804GG-Z

Overview

MPM3804GG-Z from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC power module with internal MOSFETs and a co-packaged 1µH inductor. It delivers 0.6A continuous output current from a 2.3V–5.5V input, regulates down to 0.6V, and operates at 2.4MHz with constant-on-time (COT) control for fast transient response. It is used in space-constrained portable electronics requiring compact, high-efficiency LDO replacement.

For engineers reviewing the MPM3804GG-Z datasheet, MPM3804GG-Z pinout, MPM3804GG-Z application, or MPM3804GG-Z equivalent, key selection criteria include its ultra-small 2mm × 2mm × 0.9mm QFN-10 package, 11μA quiescent current, integrated inductor, 0.5ms soft-start, and EN/PG functionality - all critical for low-power, high-density power rail design.

Technical Context

The MPM3804GG-Z implements a constant-on-time (COT) control architecture with input voltage feed-forward, enabling stable 2.4MHz switching across its full 2.3V–5.5V input range and maintaining tight line/load regulation. Its internal 120mΩ P-FET and 80mΩ N-FET switches support efficient 0.6A operation with minimal external components.

It features cycle-by-cycle over-current protection, thermal shutdown at 160°C with 30°C hysteresis, short-circuit hiccup mode recovery, and automatic output discharge during disable. The FB pin enables adjustable output (0.6V min) via resistor divider, while EN provides logic-controlled on/off sequencing.

Key Specifications

Pinout & Package

MPM3804GG-Z is housed in an ultra-small, thermally enhanced QFN-10 package (2mm × 2mm × 0.9mm) with exposed thermal pad for improved heat dissipation. Pin 10 (GND) and the underside thermal pad must be soldered to a PCB ground plane per MPS layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82084 and LTM8003, the MPM3804GG-Z offers the smallest footprint (4mm²), lowest IQ (11μA), and optimal 2.4MHz frequency for space-constrained, battery-powered designs - making it the most efficient choice for sub-5.5V input applications where board area is premium.

Availability

MPM3804GG-Z is available at Aetrix Electronics and suitable for optical transceivers, portable medical sensors, industrial IoT edge nodes, and low-voltage FPGA I/O supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MPM3804GG-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 analog and power ICs, with a focus on energy-efficient, highly integrated power management solutions for computing, automotive, industrial, and communications markets.

The MPM3804 product line delivers ultra-compact, fully integrated DC/DC modules targeting space- and power-constrained applications such as optical modules, wearables, and IoT endpoints - emphasizing minimal external components and simplified layout.

FAQ

What output voltages does the MPM3804GG-Z support?

The MPM3804GG-Z uses a resistor divider on the FB pin to set output voltage, with a fixed 0.600V feedback reference. It supports outputs from 0.6V up to the input voltage (e.g., 5.5V), commonly configured for 1.2V, 1.8V, 2.5V, or 3.3V using standard 1% resistor values per MPS Table 1. Fixed-output variants (e.g., MPM3804GG-12-Z) are also available.

Does the MPM3804GG-Z require an external inductor?

No. The MPM3804GG-Z integrates a 1µH power inductor within its QFN-10 package, eliminating the need for external magnetics. This reduces total solution size, simplifies PCB layout, and improves EMI performance by minimizing high-di/dt loop area - only input/output capacitors and FB resistors are required.

How does the enable (EN) pin function during shutdown?

When EN is pulled below 0.4V, the MPM3804GG-Z disables the power stage and activates an internal discharge MOSFET between OUT and GND. This provides a 1kΩ discharge path (typical), safely bleeding stored charge from the output capacitor to prevent floating or latch-up conditions in multi-rail systems during power sequencing.

What is the purpose of the constant-on-time (COT) control scheme?

COT control provides inherent loop stability without external compensation components, delivers faster transient response than fixed-frequency PWM, and maintains consistent switching frequency across input and output voltage ranges via input voltage feed-forward. This simplifies design and improves dynamic performance in battery-powered and variable-input applications.

Can the MPM3804GG-Z operate in dropout condition?

Yes. The MPM3804GG-Z supports 100% duty cycle operation, allowing it to maintain regulation when input voltage drops close to the output voltage (e.g., VIN = 1.25 × VOUT). This extends usable battery life in single-cell Li-ion or coin-cell applications where input voltage declines during discharge.

What thermal considerations apply to the QFN-10 package?

The QFN-10 package has θJA = 80°C/W and θJC = 16°C/W on a 4-layer PCB. To sustain 0.6A continuous output near ambient temperature limits, the exposed thermal pad must be soldered to a minimum 100mm² copper pour connected to internal ground planes. Thermal shutdown triggers at 160°C with 30°C hysteresis for safe recovery.

Is the MPM3804GG-Z RoHS and halogen-free compliant?

Yes. The MPM3804GG-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status per its Quality Assurance documentation, and the device meets JEDEC MSL Level 3 moisture sensitivity requirements for surface-mount assembly.