Monolithic Power Systems Inc. MPM3804GG-33-Z

Overview

MPM3804GG-33-Z from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC power module delivering 0.6A continuous output at a fixed 3.3V from 2.3V–5.5V input, featuring an internal 1µH inductor, 2.4MHz switching frequency, and ultra-small 2mm × 2mm × 0.9mm QFN-10 package. It supports power sequencing via EN and PG pins, includes hiccup-mode short-circuit protection, and targets space-constrained low-power systems such as optical modules and IoT edge nodes.

For engineers reviewing the MPM3804GG-33-Z datasheet, MPM3804GG-33-Z pinout, MPM3804GG-33-Z application, or MPM3804GG-33-Z equivalent, key selection criteria include its fixed 3.3V output with ±1% regulation over temperature, 340μA quiescent current, integrated power-good signaling, and compatibility with low-ESR ceramic output capacitors without external compensation.

Technical Context

The MPM3804GG-33-Z implements constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.4MHz operation across its 2.3V–5.5V input range and 3.3V output. Its internal power stage integrates 130mΩ P-FET and 100mΩ N-FET switches, enabling high efficiency (up to 91%) and fast transient response without loop compensation components.

It features dedicated open-drain PG (pin 9) with 83–90% output voltage window detection, 0.5ms internal soft-start, 100% duty-cycle capability in dropout, and thermal shutdown at 160°C with 30°C hysteresis. Output discharge is enabled during shutdown via an internal 1kΩ resistor.

Key Specifications

Pinout & Package

MPM3804GG-33-Z uses a QFN-10 (2mm × 2mm × 0.9mm) package with exposed thermal pad (GND-connected) for enhanced thermal performance in high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82085 and LTM8003-3.3, MPM3804GG-33-Z uniquely balances ultra-low profile (0.9mm), integrated PG signaling, and 340μA quiescent current-making it optimal for height-sensitive, sequenced, battery-powered designs where board area is constrained but EMI is less critical than mechanical fit.

Availability

MPM3804GG-33-Z is available at Aetrix Electronics and suitable for optical transceivers, industrial sensor nodes, space-constrained IoT gateways, and low-voltage FPGA I/O supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MPM3804GG-33-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 design centers across Asia and North America and global distribution.

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

FAQ

What is the recommended input capacitor for MPM3804GG-33-Z?

A 10µF X5R/X7R ceramic capacitor placed adjacent to VIN and GND is recommended. It must withstand RMS ripple current exceeding half the maximum load current (≥300mA). Adding a 0.1µF ceramic capacitor in parallel improves high-frequency decoupling and suppresses voltage spikes during switching transitions.

Does MPM3804GG-33-Z require external compensation components?

No. The constant-on-time (COT) control architecture and internal compensation eliminate the need for external RC networks or type-II/III compensators. Stability is guaranteed with standard low-ESR ceramic output capacitors (e.g., 22µF), simplifying design and reducing bill-of-materials.

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

PG remains low until VOUT reaches 83% of 3.3V (≈2.74V), then pulls high via external pull-up. If VOUT drops below 83% or exceeds 90% (≈2.97V), PG is actively pulled low. During shutdown or undervoltage lockout, PG is high-impedance-requiring the external pull-up to define logic state.

Can MPM3804GG-33-Z operate with input voltage equal to output voltage?

Yes. It supports 100% duty cycle in dropout mode, allowing operation down to VIN = VOUT (3.3V). Below 3.3V input, regulation is lost and output follows input minus conduction losses-enabling graceful degradation in brownout scenarios without latch-up.

What thermal considerations apply to the QFN-10 package?

The θJA is 80°C/W on a 4-layer PCB per JESD51-7. To maintain TJ ≤ 125°C at 0.6A, ambient must stay ≤ 77°C with adequate GND copper pour under the exposed pad. Thermal vias (≥4×0.3mm) to inner ground planes are mandatory for sustained full-load operation.

Is output discharge active during EN-driven shutdown?

Yes. When EN is pulled low, the internal discharge MOSFET connects OUT to GND through a 1kΩ path, discharging the output capacitor within milliseconds. This prevents back-powering of upstream circuitry and ensures safe power-down sequencing in multi-rail systems.

What is the minimum output capacitance required for stable operation?

10µF ceramic is sufficient for basic regulation, but 22µF is recommended to achieve <10mV peak-to-peak ripple at full load. Capacitor ESR should be <10mΩ; X5R/X7R dielectrics are preferred for stable capacitance across temperature and DC bias.