Monolithic Power Systems Inc. MP2184GTL-P

Overview

MP2184GTL-P from Monolithic Power Systems is a monolithic synchronous step-down DC/DC converter with integrated 65mΩ P-channel and 35mΩ N-channel MOSFETs, delivering up to 4A continuous output current across a 2.5V–5.5V input range while regulating VOUT down to 0.6V. It employs constant-on-time (COT) control for fast transient response and includes power good (PG), soft-start (SS), over-voltage protection (OVP), and hiccup-mode short-circuit protection - deployed in portable instrumentation and low-voltage I/O power rails.

For engineers reviewing the MP2184GTL-P datasheet, MP2184GTL-P pinout, MP2184GTL-P application, or MP2184GTL-P equivalent, key selection criteria include its 1.2MHz switching frequency, 1% FB accuracy, 21μA quiescent current, SOT583 package footprint, and PG open-drain logic interface timing behavior under load transients.

Technical Context

The MP2184GTL-P uses VIN-feed-forward COT control to maintain stable 1.2MHz switching frequency across input and output voltage variations, eliminating loop compensation components. Its internal high-side P-MOSFET and low-side N-MOSFET are optimized for 4A continuous conduction mode (CCM) operation with 70ns minimum on-time and 80ns minimum off-time at 3.6V input.

Advanced Asynchronous Modulation (AAM) enables discontinuous conduction mode (DCM) at light loads via zero-current detection (ZCD), reducing quiescent current to 21μA while maintaining regulation. The device integrates output discharge, 100% duty-cycle capability, and self-biased PG functionality when VIN/EN are inactive.

Key Specifications

Pinout & Package

SOT583 package: ultra-small 1.6mm × 2.1mm, 0.5mm pitch, 8-pin exposed-pad thermally enhanced leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6286418RTER and RTQ2134BGQW, the MP2184GTL-P uniquely combines 4A capability, fully adjustable 0.6V–5.5V output, integrated PG/SS, and COT control in an ultra-compact SOT583 package-enabling smaller, faster, and more flexible power delivery in portable and space-constrained systems.

Availability

MP2184GTL-P is available at Aetrix Electronics and suitable for wireless networking cards, portable instrumentation, battery-powered wearables, and low-voltage I/O system power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MP2184GTL-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2184 belongs to MPS's high-efficiency, ultra-compact DC/DC converter product line, engineered specifically for portable, battery-operated, and space-constrained applications demanding minimal external components and robust protection features.

FAQ

What is the maximum recommended PCB copper area for thermal management of the MP2184GTL-P?

The SOT583 package requires ≥100mm² of 2oz copper connected to the exposed thermal pad on at least one inner layer. For 4A continuous operation at 5.5V input, ≥200mm² total copper area across two layers reduces θJA to ≤100°C/W, keeping junction temperature below 125°C at 70°C ambient.

Can the MP2184GTL-P operate with a 1.5μH inductor at 4A load?

Yes - the datasheet specifies 0.47μH to 1.5μH as the recommended inductance range. At 1.5μH and 4A, peak inductor current reaches ~4.6A, remaining safely below the 6A HS-FET current limit. Efficiency drops ~1.2% versus 1μH, but ripple current decreases by 35%, easing output capacitor stress.

How does the PG pin behave during thermal shutdown?

During thermal shutdown, the MP2184GTL-P disables switching but maintains PG assertion as long as VFB remains ≥85% of target. PG only deasserts when VOUT collapses below regulation - providing unambiguous indication that output has failed, not just overheated.

Is the SS pin compatible with active discharge for controlled shutdown?

Yes - the SS pin supports bidirectional current: 3μA charge for soft-start and 3μA discharge during soft shutdown. Connecting SS to GND through a switch or transistor enables linear output voltage ramp-down, preventing abrupt power loss to sensitive peripherals.

Does the MP2184GTL-P support forced PWM mode to eliminate frequency variation?

No - the MP2184GTL-P operates exclusively in COT mode with automatic transition between CCM, DCM, and AAM. There is no pin or register to force fixed-frequency PWM; frequency varies ±10% with VIN/VOUT but remains tightly bounded by VIN feed-forward architecture.

What is the minimum output capacitance required for stable operation at 4A?

22μF ceramic (X5R/X7R) is the minimum recommended value per the datasheet. Using <22μF risks instability and excessive ripple (>30mV pk-pk); 44μF is preferred for full 4A load with <10mV ripple. Tantalum or electrolytic capacitors require ≥47μF plus parallel 1μF ceramic to meet ESR and ESL requirements.