Monolithic Power Systems Inc. MPQ2029GN-AEC1-P

Overview

MPQ2029GN-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified adjustable linear regulator delivering up to 450mA output current with 10µA quiescent supply current, 3V–40V input range, and 1.25V–15V programmable output voltage. It integrates power-good (PG) monitoring, programmable PG delay, thermal shutdown, short-circuit protection, and operates across –40°C to +150°C junction temperature-designed for automotive body control modules and battery-powered telematics.

For engineers reviewing the MPQ2029GN-AEC1-P datasheet, MPQ2029GN-AEC1-P pinout, MPQ2029GN-AEC1-P application, or MPQ2029GN-AEC1-P equivalent, key selection criteria include its ultra-low IQ under light load, ±2% output accuracy over temperature, SOIC8 EP thermal performance (θJA = 50°C/W), and PG timing configurability via external capacitor on PGDL.

Technical Context

The MPQ2029GN-AEC1-P implements a P-channel MOSFET pass element with internal error amplifier, reference (1.25V FB threshold), UVLO, and thermal foldback. Its feedback architecture enables precise output regulation using a two-resistor divider, while the PG circuit monitors VOUT against 93% of VFB with 5% hysteresis and user-defined delay via C_PGDL.

Control logic enforces current limiting at ~1000mA peak (exceeding 450mA continuous rating), initiates thermal shutdown at 150°C with 30°C hysteresis, and reduces GND current to <1µA in shutdown. EN pin supports 0.3V/1.8V logic thresholds for robust automotive microcontroller interfacing.

Key Specifications

Pinout & Package

The MPQ2029GN-AEC1-P is housed in a thermally enhanced SOIC8 EP (Exposed Pad) package, with θ_JA = 50°C/W on a 4-layer JEDEC JESD51-7 board. The exposed pad must be soldered to a solid 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 LDO applications.

Compared with TPS7B8750QKVURQ1 and NCV8674DSR2G, the MPQ2029GN-AEC1-P uniquely combines AEC-Q100 Grade 1 qualification, 450mA current, 10µA IQ, and programmable PG delay-making it optimal for next-generation automotive domain controllers requiring flexible, sequenced, and ultra-low-power regulation.

Availability

MPQ2029GN-AEC1-P is available at Aetrix Electronics and suitable for automotive body electronics, telematics gateways, and industrial battery-powered sensors requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for MPQ2029GN-AEC1-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 demanding ultra-low quiescent current, wide input voltage tolerance, and robust fault protection in vehicles and industrial equipment.

FAQ

What is the minimum output capacitor required for stability?

The MPQ2029GN-AEC1-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 ripple. Tantalum or aluminum electrolytic capacitors are not recommended due to temperature-dependent capacitance drift and ESR instability.

How does the PGDL pin configure power-good timing?

The PGDL pin charges an external capacitor (e.g., 47nF) with a 3–9µA current. When the capacitor voltage reaches 1.4–2.0V, the PG output asserts high. With C_PGDL = 47nF, delay ranges from 5ms to 15ms depending on process variation. This allows precise synchronization of downstream logic startup after output stabilization.

Can the MPQ2029GN-AEC1-P operate with a 6V input and 5V output?

Yes. At 6V input and 5V output, dropout is 1V-well within the device's capability. The regulator delivers full 450mA continuously under these conditions, provided junction temperature remains ≤150°C. Thermal calculation shows 186mA max at 85°C ambient with standard SOIC8 EP layout, but derating is unnecessary here since power dissipation is only (6V–5V)×0.45A = 0.45W.

Is reverse-voltage protection built-in?

No. The MPQ2029GN-AEC1-P lacks internal reverse-voltage protection. If the output voltage exceeds the input (e.g., backup battery scenario), current flows through the internal P-FET body diode uncontrolled. To prevent damage, an external Schottky diode must be placed in series with the IN pin, oriented to block reverse current.

What is the significance of the exposed pad in the SOIC8 EP package?

The exposed pad is electrically connected to GND and serves as the primary thermal path. Soldering it to a large copper ground plane reduces θ_JA significantly-critical for maintaining ≤150°C junction temperature at 450mA. It also lowers ground impedance, improving PSRR and reducing noise coupling into sensitive analog circuits.

Does the FB pin require a minimum load current?

Yes. To ensure proper regulation, the feedback network must draw ≥12.5µA from the FB node. Using R2 = 100kΩ guarantees this minimum load. Lower R2 values increase current draw and improve noise immunity but raise power consumption; higher values risk regulation inaccuracy due to FB input current (50nA) errors.

How does thermal shutdown behave during overload?

When junction temperature reaches 150°C, thermal shutdown disables the pass transistor and control circuitry, dropping output current to near zero. The device remains latched off until temperature falls by ≥30°C (hysteresis), then automatically recovers. This cycle prevents permanent damage during sustained short-circuit or excessive ambient conditions.