Monolithic Power Systems Inc. MP2019GN-5-Z

Overview

MP2019GN-5-Z from Monolithic Power Systems is a 40V-input, 300mA adjustable/fixed-output linear regulator in SOIC-8 EP package, featuring 10µA quiescent current, 5V fixed output (±2% accuracy), 480mV dropout at 300mA, and integrated power-good with programmable delay. It powers ultra-low-power microcontrollers in battery-backed industrial sensors.

For engineers reviewing the MP2019GN-5-Z datasheet, MP2019GN-5-Z pinout, MP2019GN-5-Z application, or MP2019GN-5-Z equivalent, key selection criteria include input voltage range (3–40V), thermal shutdown threshold (165°C), PG delay programmability via external capacitor, and SOIC-8 EP thermal performance (θJA = 50°C/W).

Technical Context

The MP2019GN-5-Z implements a PMOS-based low-dropout architecture with internal 3MΩ/1MΩ feedback divider for fixed 5V output, enabling stable regulation across 3V–40V input without external resistors. Its EN pin provides logic-level on/off control with 0.3V/1.8V thresholds, and the open-drain PG pin asserts after VOUT reaches 92% of nominal value.

Power-good timing is user-programmable via PGDL pin charging current (3–9µA) and external capacitor; a 47nF capacitor yields 5–15ms delay. Thermal protection uses a 165°C shutdown threshold with 30°C hysteresis, and short-circuit current limiting peaks at 1000mA while sustaining 300mA continuous output.

Key Specifications

Pinout & Package

MP2019GN-5-Z is housed in a thermally enhanced SOIC-8 EP (exposed pad) package measuring 4.9mm × 3.9mm × 1.75mm, with θJA = 50°C/W on 4-layer PCB. The exposed pad must be soldered to a dedicated ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and NCP1117ST50T3G, MP2019GN-5-Z uniquely combines 40V input tolerance, 12µA quiescent current, and programmable power-good delay - making it optimal for new designs requiring long-life battery operation and robust power sequencing in harsh environments.

Availability

MP2019GN-5-Z is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body controllers, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature and voltage ranges.

Supply support for MP2019GN-5-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.

The MP2019 product line targets ultra-low-power, high-input-voltage linear regulation for battery-backed industrial and automotive systems - emphasizing quiescent current optimization, thermal resilience, and integrated power sequencing.

FAQ

What is the minimum input voltage required for MP2019GN-5-Z to regulate 5V output?

The MP2019GN-5-Z requires a minimum input voltage of 5.48V to maintain 5V output at 300mA load, based on its 480mV dropout specification. At lighter loads, input can drop to 5.2V due to reduced dropout (230mV at 150mA). Below 5.2V, regulation fails and output collapses.

Can the PG pin drive a microcontroller GPIO directly without a pull-up resistor?

No. The PG pin is an open-drain MOSFET output and requires an external pull-up resistor (typically 100kΩ to VOUT or another 3.3–5V rail) to assert a logic-high signal. Leaving PG unconnected results in floating state; connecting it directly to GPIO without pull-up will not produce valid logic levels.

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

Yes. The exposed pad is internally connected to the GND terminal (Pin 3) and must be soldered to a PCB copper pour tied to the system ground plane. This connection is mandatory for both thermal dissipation (reducing θJA by ~20°C/W) and electrical stability - omitting it risks thermal runaway and regulation failure.

How does the MP2019GN-5-Z handle reverse voltage conditions at the output?

The MP2019GN-5-Z contains a PMOS pass transistor with an intrinsic body diode from OUT to IN. If output voltage exceeds input (e.g., backup battery holds VOUT high while VIN is disconnected), reverse current flows uncontrolled and may damage the IC. An external Schottky diode from IN to OUT is required to block this path in such configurations.

What is the maximum allowable capacitance on the PGDL pin?

The PGDL pin supports capacitors up to 100nF, though the datasheet specifies 47nF for standard 5–15ms delay. Larger values extend delay linearly (e.g., 100nF yields ~10–32ms), but exceed recommended layout practices due to increased susceptibility to noise coupling. Values above 100nF risk timing inaccuracy and PG assertion jitter.

Does the MP2019GN-5-Z require an input capacitor, and what type is recommended?

Yes. A 1µF to 10µF X5R or X7R ceramic capacitor must be placed between VIN and GND, located within 2mm of the IC. This capacitor suppresses input ripple and improves line transient response. Tantalum or electrolytic capacitors are not recommended due to ESR instability and temperature drift affecting regulation accuracy.

Can the MP2019GN-5-Z be used in adjustable-output mode despite its -5 suffix?

No. The MP2019GN-5-Z is factory-trimmed for fixed 5V output using internal 3MΩ/1MΩ feedback resistors. Its FB pin is not functional for external adjustment; connecting external resistors will not alter output voltage and may impair regulation. Use MP2019GN for adjustable operation (1.25–15V).