Monolithic Power Systems Inc. MCQ1823GQTE-530BRNAEC-P

Overview

MCQ1823GQTE-530BRNAEC from Monolithic Power Systems is an automotive-grade linear Hall-effect current sensor IC with integrated over-current detection (OCD), designed for bidirectional DC/AC current sensing up to ±30A in space-constrained systems. It features a 0.6mΩ internal conductor, 66mV/A sensitivity at 5V supply, ±2.5% total output error, and 120kHz bandwidth. Its differential Hall array rejects stray magnetic fields, enabling accurate measurement in noisy motor control or power supply environments.

For engineers reviewing the MCQ1823GQTE-530BRNAEC datasheet, MCQ1823GQTE-530BRNAEC pinout, MCQ1823GQTE-530BRNAEC application, or MCQ1823GQTE-530BRNAEC equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification, ratiometric or absolute VOUT options, 1µs OCD response time, and TQFN-12 (3mm×3mm) ultra-small package for high-density automotive PCB layouts.

Technical Context

The MCQ1823GQTE-530BRNAEC uses a differential Hall transducer pair to measure magnetic field gradients across a low-resistance (0.6mΩ) integrated primary conductor, eliminating offset drift via spinning current technique. Its architecture supports both ratiometric and absolute output modes, with factory trimming ensuring ±2.5% total error over -40°C to +125°C.

Fast over-current detection is implemented via an open-drain /OCD pin with user-configurable threshold (100% of IPMAX by default), 1µs response time, and 3–12% hysteresis. The device operates from a single 4.5–5.5V supply, draws ≤12mA, and delivers analog VOUT proportional to current with 120kHz small-signal bandwidth.

Key Specifications

Pinout & Package

TQFN-12 (3mm × 3mm, 0.5mm pitch) package with wettable flanks, AEC-Q100 qualified, MSL Level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall-effect current sensing applications.

Compared with ACS724LLCTR-30AB-T and TLE4971-30S4, the MCQ1823GQTE-530BRNAEC delivers identical sensitivity and bandwidth in a 3mm×3mm footprint with integrated 1µs OCD-reducing solution size by 75% versus SOIC-8 and eliminating external comparators needed by the ACS724.

Availability

MCQ1823GQTE-530BRNAEC is available at Aetrix Electronics and suitable for motor control, automotive battery management, and switch-mode power supply applications requiring stable component supply, AEC-Q100 qualification, and ultra-compact current sensing.

Supply support for MCQ1823GQTE-530BRNAEC 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 power management ICs, with design centers in the US, China, and Taiwan.

The MCQ1823 product line targets automotive and industrial current sensing, delivering integrated Hall-effect solutions that replace discrete shunts and amplifiers while meeting AEC-Q100 reliability standards.

FAQ

What is the default over-current detection threshold for MCQ1823GQTE-530BRNAEC?

The default OCD threshold is set to ±100% of the rated current (±30A). This is achieved by leaving the /OCD pin unconfigured; no external pull-up resistor is required for nominal operation. Threshold can be adjusted between 50% and 240% of IPMAX by connecting a 10kΩ–500kΩ resistor from /OCD to VCC.

Does MCQ1823GQTE-530BRNAEC support unidirectional current sensing?

No - the "B" in the part number suffix indicates bidirectional polarity. This variant is specifically configured for ±30A symmetric sensing. Unidirectional variants (e.g., MCQ1823GQTE-530URNAEC) exist but use different internal zero-current offset calibration and are not interchangeable.

Can VOUT be used directly with a 3.3V ADC without level-shifting?

Yes - with VCC = 5V and zero current, VOUT = 2.5V (ratiometric mode). At ±30A, VOUT swings from −0.5V to +5.5V. To interface with a 3.3V ADC, use a simple resistive divider (e.g., 20kΩ + 33kΩ) and ensure the ADC input common-mode range includes 0–2.5V. Clamping diodes are recommended for overvoltage protection.

What is the thermal performance impact of the 0.6mΩ conductor at 30A continuous?

At 30A DC, power dissipation is I²R = 900 × 0.0006 = 0.54W. In the TQFN-12 package with JEDEC-standard PCB layout (2-layer, 1oz copper, 1in² thermal pad), typical junction-to-ambient θJA is ~120°C/W, resulting in ~65°C temperature rise above ambient - well within the +125°C max TJ rating at 60°C ambient.

Is the /OCD pin compatible with 3.3V logic systems?

Yes - the /OCD pin is open-drain and rated for 6.5V max. When pulled up to 3.3V via a 10kΩ–500kΩ resistor, it asserts low at ≤0.3V, which is compatible with standard 3.3V CMOS input thresholds. No level-shifter is required for interfacing with 3.3V microcontrollers.

How does the differential Hall array improve immunity to external magnetic fields?

The integrated dual Hall plates measure magnetic field difference rather than absolute magnitude. Homogeneous fields (e.g., from nearby solenoids) induce equal voltages in both sensors, canceling out. Gradient fields produce opposing signals due to spatial separation, enabling rejection of interference from adjacent current-carrying traces or motors.

What PCB layout practices maximize accuracy for MCQ1823GQTE-530BRNAEC?

Route IP+ and IP− traces symmetrically and in parallel to preserve field gradient symmetry. Place the device away from ferrite cores or magnets. Use solid ground plane under the package, connect GND pin directly to it with multiple vias, and keep VCC bypass capacitor (0.1µF X7R) within 2mm of pin 12. Avoid routing high-dv/dt signals near VOUT or /OCD.