Monolithic Power Systems Inc. MP2187GQA-P

Overview

MP2187GQA-P from Monolithic Power Systems is a dual-channel synchronous step-down DC/DC converter with integrated 60mΩ/30mΩ MOSFETs, delivering up to 3A per channel at fixed 1.1V and 1.8V outputs from a 2.5V–5.5V input. It employs constant-on-time (COT) control for fast transient response and operates at 1.2MHz switching frequency in a compact 2.2mm × 2.6mm QFN-16 package-ideal for powering FPGA core/I/O rails and mobile SoC subsystems.

For engineers reviewing the MP2187GQA-P datasheet, MP2187GQA-P pinout, MP2187GQA-P application, or MP2187GQA-P equivalent, key selection criteria include dual-rail sequencing capability via independent EN1/EN2, power-good indication (PG1) for channel 1, input voltage failure detection (PFS/PFL), and thermal/over-current protection with hiccup-mode recovery.

Technical Context

The MP2187GQA-P implements a dual independent COT control architecture with input-voltage feed-forward, maintaining stable 1.2MHz switching across its full 2.5V–5.5V input range. Each channel features dedicated high-side (60mΩ) and low-side (30mΩ) MOSFETs, cycle-by-cycle current limiting, and auto-discharge during shutdown.

It integrates precision ±1.5% output voltage regulation (1.1V/1.8V), ±10% power-good window referenced to 0.6V FB, and a 0.588V–0.612V input voltage failure threshold with 12mV hysteresis. Thermal shutdown activates at 150°C with 30°C hysteresis, and UVLO engages at 2.2V rising threshold.

Key Specifications

Pinout & Package

MP2187GQA-P is housed in a thermally enhanced 2.2mm × 2.6mm QFN-16 package with exposed thermal pad (JEDEC MO-220 compliant). The package supports high-density PCB layouts and efficient heat dissipation in space-constrained applications such as smartphones and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RTQ2132B-QT and TPS65270PWP, MP2187GQA-P uniquely balances compact size, dual-rail sequencing, and fault-aware features-making it optimal for space-constrained, battery-operated, and FPGA-centric designs where reliability and minimal external components are prioritized.

Availability

MP2187GQA-P is available at Aetrix Electronics and suitable for FPGA power management, smartphone SoC subsystems, portable instrumentation, and wireless network cards requiring stable component supply across production lifecycles.

Supply support for MP2187GQA-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 over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP2187 belongs to MPS's high-density dual-buck converter product line, designed specifically for powering multi-rail digital loads-including FPGAs, ASICs, and mobile processors-where small footprint, fast transient response, and robust protection are mandatory.

FAQ

What is the maximum allowable input voltage for MP2187GQA-P?

The absolute maximum input voltage is 6V, but the recommended operating range is 2.5V to 5.5V. Exceeding 6V risks permanent damage to internal MOSFETs and control circuitry. For 5.5V nominal systems, ensure transient spikes remain below 6V using appropriate input filtering or TVS protection.

Can MP2187GQA-P generate adjustable output voltages?

Only channel 1 (1.1V rail) supports adjustment via external feedback resistors connected to FB1; channel 2 is fixed at 1.8V. To set a new VOUT1, use R1 and R2 such that R1 + R2 ≤ 20kΩ and VOUT1 = 0.6V × (1 + R1/R2). Common values are listed in the datasheet Table 1.

How does the power-fail detection (PFS/PFL) function work?

PFS senses input voltage via an external resistor divider. When the divided voltage falls below 0.588V (typical), the open-drain PFL pin pulls low. The 12mV hysteresis prevents chatter during slow brown-out events. PFL can drive a microcontroller interrupt or initiate controlled shutdown sequences.

Is thermal shutdown reversible without cycling power?

Yes. Thermal shutdown at 150°C is self-resetting: once junction temperature drops by 30°C (to ~120°C), the device automatically resumes normal operation. This hiccup-style recovery avoids manual intervention in thermally constrained enclosures like sealed handheld devices.

What is the minimum off-time specification and why does it matter?

The minimum off-time is 50ns. It prevents inductor current runaway during large load transients and ensures stable COT operation. In practice, this limit only affects very high-duty-cycle scenarios (e.g., VIN ≈ VOUT); for typical 5V→1.1V conversion, it imposes no operational constraint.

Does MP2187GQA-P support forced continuous conduction mode (FCCM)?

No. The MP2187GQA-P uses proprietary light-load control that transitions smoothly between CCM and DCM without audible noise or output ripple spikes. FCCM is not implemented; instead, zero-current detection (ZCD) manages low-side FET turn-off to suppress ringing and improve light-load efficiency.

What PCB layout recommendations are critical for EMI performance?

Place input capacitors (C1A/C1B) directly between VIN1/VIN2 and adjacent GND pins with shortest possible traces. Keep SW1/SW2 nodes short and away from FB/OUT traces. Use the exposed thermal pad for grounding and thermal relief. Follow the symmetric layout in Figure 4 unless space constraints require the asymmetric version with ferrite bead isolation.