Monolithic Power Systems Inc. MPQ20056GJ-AEC1-Z

Overview

MPQ20056GJ-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified low-noise, high-PSRR linear regulator delivering up to 250mA output current with 100mV dropout at full load, 150μA ground current, and fixed 1.8V output voltage in a TSOT23-5 package-designed for automotive infotainment power rails requiring stable low-voltage biasing under transient load conditions.

For engineers reviewing the MPQ20056GJ-AEC1-Z datasheet, MPQ20056GJ-AEC1-Z pinout, MPQ20056GJ-AEC1-Z application, or MPQ20056GJ-AEC1-Z equivalent, this device supports precise low-noise analog supply domains in ADAS camera modules, automotive telematics processors, and CAN/LIN transceiver VCC rails where PSRR >63dB at 1kHz and thermal shutdown at 150°C are critical selection criteria.

Technical Context

The MPQ20056GJ-AEC1-Z integrates a PMOS pass element enabling ultra-low dropout (100mV @ 250mA) and minimal ground current (150μA @ light load), while its internal 0.8V reference and feedback architecture support both fixed-output operation and adjustable configurations via external resistor dividers. Its UVLO threshold (1.95V rising) and hysteresis (160mV) ensure robust startup under automotive battery sag conditions.

Thermal protection activates at 150°C with 20°C hysteresis, and short-circuit current limiting is guaranteed between 350mA and 850mA. The device achieves 13μVRMS output noise (10Hz–100kHz) and maintains 63dB PSRR at 1kHz across its 2.5V–5.5V input range, making it suitable for noise-sensitive RF and sensor signal chains.

Key Specifications

Pinout & Package

MPQ20056GJ-AEC1-Z uses the TSOT23-5 package (2.9mm × 1.6mm × 1.1mm height), with exposed pad omitted - thermal performance relies on PCB copper area under pins 1–5. Pin functions are validated per MPS Rev. 1.3 datasheet Section 5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with TPS7A0518PDBVR and NCP114AMX18T2G, MPQ20056GJ-AEC1-Z uniquely delivers AEC-Q100 Grade 1 compliance, 63dB PSRR, and 20μVRMS noise in the same TSOT23-5 footprint - essential for safety-critical ADAS and powertrain-adjacent systems demanding full automotive reliability.

Availability

MPQ20056GJ-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics gateways requiring stable component supply with full AEC-Q100 traceability, extended temperature operation, and low-noise power integrity.

Supply support for MPQ20056GJ-AEC1-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 MPQ20056 belongs to MPS's automotive-grade LDO product line, engineered specifically for noise-sensitive, thermally constrained automotive subsystems where AEC-Q100 qualification, low IQ, and high PSRR are mandatory.

FAQ

Is MPQ20056GJ-AEC1-Z pin-compatible with other MPQ20056 variants in TSOT23-5?

Yes - all TSOT23-5 variants (MPQ20056GJ-18, MPQ20056GJ-25, MPQ20056GJ-29, MPQ20056GJ-33, and their -AEC1 versions) share identical pinout, package dimensions, and thermal pad configuration. Only the internal feedback divider differs; no PCB redesign is needed when changing output voltage variants.

What is the minimum input voltage required for regulation at 1.8V output?

The MPQ20056GJ-AEC1-Z requires VIN ≥ 1.9V to maintain regulation, based on its 100mV dropout and 1.95V UVLO rising threshold. Below 1.95V, the device disables; above that, regulation begins once VIN exceeds VOUT + dropout (i.e., ≥1.9V at 25°C). At –40°C, dropout increases to 200mV, requiring VIN ≥ 2.0V.

Can MPQ20056GJ-AEC1-Z be used without an output capacitor?

No - the device requires a minimum 4.7μF ceramic capacitor at the OUT pin for stability, as confirmed in Section 12 of the datasheet. Omitting it causes oscillation and violates AEC-Q100 stress test conditions. The capacitor must be X5R/X7R dielectric with ≤100mΩ ESR and placed within 3mm of the OUT and GND pins.

Does MPQ20056GJ-AEC1-Z support reverse voltage protection?

No - the internal PMOS pass element contains a body diode that conducts from OUT to IN if VOUT > VIN. In backup-battery or hot-swap scenarios, this can cause destructive reverse current. An external Schottky diode (e.g., Diodes Inc. APD1013) must be added in series with the IN pin per Figure 4 of the datasheet.

How does thermal performance differ between QFN8 and TSOT23-5 packages?

The TSOT23-5 variant has θJA = 220°C/W (vs. 80°C/W for QFN8), resulting in ~2.8× higher junction temperature rise at identical power dissipation. For 250mA at 3.3V dropout (0.825W), TSOT23-5 reaches ~180°C rise above ambient - exceeding safe limits. Derating to ≤120mA is recommended for continuous operation at TA = 85°C.

Is the FB pin accessible on MPQ20056GJ-AEC1-Z for external adjustment?

No - the FB pin is internally connected to the fixed 1.8V resistor divider and is not brought out to a package pin in fixed-output variants like MPQ20056GJ-AEC1-Z. Only adjustable versions (e.g., MPQ20056GJ) expose FB externally; modifying output voltage on this part requires replacing the device.

What is the maximum allowable input voltage for sustained operation?

The absolute maximum VIN is +6V, but sustained operation above 5.5V violates Recommended Operating Conditions and risks parametric shift or accelerated wear-out. For automotive 12V systems with transient spikes, a front-end TVS (e.g., Littlefuse SMAJ5.0A) is mandatory to clamp transients before the LDO input.