Monolithic Power Systems Inc. MPQ2019GN-33-Z

Overview

MPQ2019GN-33-Z from Monolithic Power Systems is a fixed-output 3.3V, 300mA low-quiescent-current linear regulator with 3V–40V input range, AEC-Q100 Grade 1 qualification, ±2% output accuracy over temperature, and integrated power-good signaling with programmable delay. It delivers stable bias for automotive microcontrollers and industrial sensors operating in high-voltage battery systems.

For engineers reviewing the MPQ2019GN-33-Z datasheet, MPQ2019GN-33-Z pinout, MPQ2019GN-33-Z application, or MPQ2019GN-33-Z equivalent, key selection criteria include dropout voltage at 300mA (≤640mV), 12–16µA quiescent current across load range, thermal shutdown at 165°C, PG threshold hysteresis (5% VFB), and SOIC-8 EP package thermal resistance (θJA = 50°C/W).

Technical Context

The MPQ2019GN-33-Z implements a PMOS pass transistor architecture enabling low-dropout operation down to 230mV at 150mA and 480mV at 300mA. Its internal feedback reference is trimmed to 1.25V, and the fixed 3.3V output is achieved via an integrated resistor divider (R1_IN = 1.64MΩ, R2_IN = 1MΩ).

It integrates three fault protections: current limiting (600–1350mA peak), thermal shutdown with 30°C hysteresis, and open-drain power-good monitoring with externally programmable delay (5–15ms via 47nF on PGDL). EN control enables logic-level on/off sequencing with 0.3V/1.8V thresholds.

Key Specifications

Pinout & Package

MPQ2019GN-33-Z is housed in a SOIC-8 EP (exposed pad) package optimized for thermal dissipation in automotive environments. The exposed pad must be soldered to a dedicated ground plane for θJA = 50°C/W performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output linear regulator applications.

Compared with TPS7B8133QDDARQ1 and NCV8664ST33T3G, MPQ2019GN-33-Z uniquely balances cold-crank capability (3V start), programmable PG timing, and AEC-Q100 Grade 1 rating - making it optimal for next-generation ADAS domain controllers and centralized gateways.

Availability

MPQ2019GN-33-Z is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, medical portable monitors, and telematics control units requiring stable component supply under AEC-Q100 compliance and long-term production continuity.

Supply support for MPQ2019GN-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 in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ2019 product line targets automotive and industrial power management, specifically addressing the need for high-input-voltage, low-IQ, AEC-Q100-compliant linear regulators in harsh-environment electronic control units.

FAQ

What is the minimum input voltage required for MPQ2019GN-33-Z to regulate 3.3V at full 300mA load?

The minimum input voltage is determined by dropout voltage: at 300mA and +25°C, V_DROPOUT ≤ 640mV. Therefore, VIN must be ≥ 3.3V + 0.64V = 3.94V to maintain regulation. At –40°C, dropout increases slightly; design margin should target ≥4.1V minimum input.

Can MPQ2019GN-33-Z be used without connecting the PGDL pin?

Yes. PGDL is optional: if unused, it may be left floating. In that case, the power-good signal asserts immediately upon V_OUT reaching 92% of nominal (3.04V), with no intentional delay. No pull-up or pull-down is required.

Is the exposed pad of the SOIC-8 EP package electrically connected to GND?

Yes. The exposed pad is internally tied to Pin 3 (GND). It must be soldered to a PCB ground plane with ≥4 thermal vias to achieve rated θ_JA = 50°C/W and prevent thermal shutdown under 300mA load at elevated ambient temperatures.

Does MPQ2019GN-33-Z require an input capacitor, and what value is recommended?

Yes. A 1µF–10µF X5R/X7R ceramic capacitor is required between IN and GND, placed within 3mm of the pin. This stabilizes input impedance, suppresses high-frequency noise, and improves line transient response - especially critical during load-dump events.

How does the power-good (PG) pin behave during thermal shutdown?

During thermal shutdown, the internal pass element turns off and V_OUT collapses. When V_FB drops to 88% of 1.25V (1.1V), the PG pin pulls low within 0.5–2µs. PG remains low until thermal recovery and re-regulation occur, providing unambiguous fault indication to the host system.

What is the maximum allowable output capacitor ESR for stable operation?

No ESR requirement exists. The MPQ2019GN-33-Z is explicitly designed to be stable with low-ESR ceramic capacitors ≥0.47µF - eliminating the need for aluminum or tantalum caps with defined ESR ranges and simplifying layout and reliability validation.

Is the FB pin accessible or usable in the MPQ2019GN-33-Z variant?

No. In the fixed-output MPQ2019GN-33-Z, the FB pin is internally connected to the precision 3.3V divider and must be left unconnected. It is not functional for external adjustment - only the adjustable MPQ2019GN variant uses FB for voltage setting.