Monolithic Power Systems Inc. MPQ2029GN-P

Overview

MPQ2029GN-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified adjustable-output linear regulator delivering up to 450mA at 1.25V–15V output, with 3V–40V input range, 10µA quiescent current, and integrated Power Good (PG) with programmable delay. It serves as a primary power supply for automotive microcontrollers and battery-backed industrial sensors requiring ultra-low standby power and high-voltage tolerance.

For engineers reviewing the MPQ2029GN-P datasheet, MPQ2029GN-P pinout, MPQ2029GN-P application, or MPQ2029GN-P equivalent, key selection criteria include its ±2% output accuracy over temperature, thermal shutdown at 150°C, SOIC8 EP package with exposed pad for thermal management, and PG delay programmability via external capacitor.

Technical Context

The MPQ2029GN-P implements a P-channel MOSFET pass element with internal error amplifier, reference voltage (1.25V), UVLO, and thermal foldback. Its feedback loop uses external resistor divider on FB pin to set output voltage, enabling precise regulation across wide load and line conditions.

It integrates dual protection logic: current-limiting fault response (600–1350mA trip range) and thermal shutdown with 30°C hysteresis, plus PG assertion at 89–97% of VFB with <2µs reaction time. The PGDL pin allows configurable delay (5–15ms) using a single external capacitor.

Key Specifications

Pinout & Package

MPQ2029GN-P is housed in a thermally enhanced SOIC8 EP (Exposed Pad) package measuring 4.9mm × 3.9mm × 1.75mm, with θ_JA = 50°C/W on 4-layer PCB. The exposed pad must be soldered to a dedicated ground plane for effective heat dissipation and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B8133QPWPRQ1 and NCV8664ST33T3G, MPQ2029GN-P uniquely combines wide-adjustable output, ultra-low I_Q, programmable PG timing, and AEC-Q100 Grade 1 in one SOIC8 EP package-enabling single-part scalability across multiple voltage rails and safety domains.

Availability

MPQ2029GN-P is available at Aetrix Electronics and suitable for automotive electronic control units, industrial data loggers, portable medical devices, and telematics systems requiring stable component supply with long lifecycle assurance.

Supply support for MPQ2029GN-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ2029 belongs to MPS's automotive-grade linear regulator product line, engineered specifically for harsh-environment applications including engine control, ADAS, and body electronics where reliability, low quiescent current, and AEC-Q100 compliance are mandatory.

FAQ

What is the minimum output capacitor required for stability?

The MPQ2029GN-P is stable with a minimum 0.47µF X5R or X7R ceramic capacitor on the output. Larger values (up to 22µF) improve load transient response and reduce output noise, especially in systems with fast-switching digital loads like microcontrollers.

Can MPQ2029GN-P operate with reverse input voltage?

No. The device lacks reverse-voltage protection due to the inherent body diode of its internal P-FET pass transistor. If output voltage may exceed input (e.g., during backup battery hold-up), an external Schottky diode must be placed in series with the IN pin to prevent destructive reverse current flow.

How is the Power Good delay time calculated?

PG delay time is determined by the capacitance on PGDL pin and its internal 3–9µA charging current: t_PGD ≈ C_PGDL × 1.7V / I_CHG. With a 47nF capacitor and typical 5.5µA charge current, delay is ~10ms. Values range from 5ms (C = 22nF) to 15ms (C = 68nF).

What is the maximum allowable power dissipation at 85°C ambient?

Using θ_JA = 50°C/W and T_J(MAX) = 150°C, maximum power dissipation is (150 − 85) / 50 = 1.3W. At 12V input and 5V output, this supports up to ~186mA continuous load before thermal limiting engages-below the 450mA current rating but within safe silicon limits.

Does MPQ2029GN-P support external soft-start?

No. The device does not implement external soft-start control. However, the built-in PG delay (via PGDL capacitor) provides functional sequencing capability, and startup response time is fixed at ~2.5ms (10% to 90% V_OUT) under typical conditions.

Is the exposed pad electrically connected internally?

Yes. The exposed pad is internally connected to GND and must be soldered to a PCB ground plane. It serves both thermal conduction (reducing θ_JA) and electrical grounding-failure to connect it compromises thermal performance, noise immunity, and PG accuracy.

What is the FB pin input bias current?

The FB pin draws only 50nA typical input current, enabling use of high-value feedback resistors (e.g., R2 = 100kΩ, R1 = 698kΩ for 10V output) without significant voltage division error or power loss-critical for battery-powered systems.