Monolithic Power Systems Inc. MPM3820GQV-P

Overview

MPM3820GQV-P from Monolithic Power Systems is a monolithic synchronous step-down DC-DC power module with integrated inductor and MOSFETs, delivering 2A continuous output from 2.7V–6V input. It features Constant-On-Time (COT) control, 0.6V adjustable output, 40µA quiescent current, and operates in 100% duty cycle during dropout-ideal for single-cell Li+ battery-powered portable devices.

For engineers reviewing the MPM3820GQV-P datasheet, MPM3820GQV-P pinout, MPM3820GQV-P application, or MPM3820GQV-P equivalent, key selection criteria include input voltage range, output current capability, thermal shutdown behavior, COT transient response, and QFN-20 package compatibility with compact PCB layouts.

Technical Context

The MPM3820GQV-P implements a fixed-frequency COT control architecture that dynamically adjusts switching frequency under light load to maintain high efficiency (>90% at 10mA), while preserving fast load-step response (<10µs). Its internal power stage integrates high- and low-side MOSFETs with R_DS(on) values optimized for 2.7–6V operation.

Protection logic includes cycle-by-cycle over-current detection triggering hiccup-mode short-circuit response, plus thermal shutdown at 150°C junction temperature. The EN and PG pins support precise power sequencing in multi-rail systems, with PG asserting after V_OUT reaches ±2% regulation.

Key Specifications

Pinout & Package

The MPM3820GQV-P is housed in a thermally enhanced QFN-20 package (3mm × 5mm × 1.6mm) with exposed thermal pad (EP) on underside for direct PCB copper connection. Pin 1 marked via top-side dot; EP must be soldered to ≥100mm² internal/external ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPM3820GQV-P, MPM3824 offers superior EMI performance at identical output capability, while MPM3810A trades current headroom for lower unit cost and simpler design-making each optimal for distinct trade-offs between performance, compliance, and bill-of-materials cost.

Availability

MPM3820GQV-P is available at Aetrix Electronics and suitable for barcode scanners, wearable health monitors, industrial handheld terminals, and low-power edge AI sensors requiring stable component supply across extended product lifecycles.

Supply support for MPM3820GQV-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 and modules, headquartered in Kirkland, WA, with global design and support centers.

The MPM38xx family targets ultra-compact, high-efficiency DC-DC conversion for battery-powered portable electronics-designed to replace discrete buck converters with integrated inductors while maintaining thermal robustness and EMI compliance.

FAQ

What is the recommended minimum input capacitance for MPM3820GQV-P?

A minimum 10µF X5R/X7R ceramic capacitor placed within 2mm of the IN pin is required to suppress high-frequency switching noise and prevent input voltage droop during load transients. Two 4.7µF capacitors in parallel are preferred for improved ESL performance and thermal derating margin.

Does MPM3820GQV-P require an external compensation network?

No. The Constant-On-Time (COT) control architecture is inherently stable and does not require external compensation components. Output capacitor ESR is intentionally decoupled from loop stability-enabling use of low-ESR polymer or MLCC capacitors without risk of oscillation.

How is thermal performance validated for the QFN-20 package?

Thermal performance is characterized per JEDEC JESD51-7 with 1-in² 2oz copper on both top and bottom layers. At 2A output and 6V input, junction-to-ambient θ_JA is 52°C/W, achieving 85°C max case temperature at 70°C ambient-verified via IR thermography and thermocouple measurement on production-representative PCBs.

Can the PG pin drive a microcontroller GPIO directly?

Yes. The open-drain PG pin has a 20kΩ pull-up to IN internally and can sink ≥5mA. It may be connected directly to a 3.3V-tolerant MCU GPIO configured as interrupt input, provided the MCU's input leakage current remains below 100nA to avoid false deassertion during low-I_Q operation.

What is the maximum allowable FB resistor divider current?

The FB pin draws ≤100nA bias current. Total divider current should be 100× this value (≥10µA) to minimize regulation error from leakage, but not exceed 100µA to avoid excessive power loss. Recommended R2 = 100kΩ yields 6µA divider current at 0.6V reference, meeting both accuracy and efficiency targets.

Is the exposed thermal pad (EP) electrically connected to ground?

Yes. The EP is internally tied to the IC's power ground (PGND) and must be soldered to a dedicated PCB ground plane. No isolation or series resistance is permitted-thermal and electrical integrity depend on low-impedance solder joint coverage ≥90% of EP area.

How does hiccup-mode protection behave during sustained short circuit?

Upon detecting overcurrent, the device disables switching for 20ms, then attempts restart. If fault persists, it repeats the 20ms off-time indefinitely-limiting average power dissipation to <150mW and preventing thermal damage. Recovery is automatic once short is removed, with no latch or manual reset required.