Monolithic Power Systems Inc. MCS1823GQTE-310BRN-Z

Overview

MCS1823GQTE-310BRN-Z from Monolithic Power Systems is a bidirectional linear Hall-effect current sensor IC with integrated over-current detection (OCD), designed for high-accuracy AC/DC current sensing in space-constrained systems. It features ±10A rated current range, 132 mV/A sensitivity, 0.6 mΩ internal conductor resistance, 120 kHz bandwidth, and operates from a 3.3V supply. Used in motor control and switch-mode power supplies where compact size and fast fault response are critical.

For engineers reviewing the MCS1823GQTE-310BRN-Z datasheet, MCS1823GQTE-310BRN-Z pinout, MCS1823GQTE-310BRN-Z application, or MCS1823GQTE-310BRN-Z equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and confirmed alternative options - all grounded in Monolithic Power Systems' official Rev. 1.0 documentation.

Technical Context

The MCS1823GQTE-310BRN-Z employs a differential Hall array to reject external magnetic field gradients, enabling stable operation in electrically noisy environments. Its spinning current technique minimizes offset drift, while factory trimming ensures ±2.5% total output error across –40°C to +125°C.

It integrates a fast open-drain /OCD output with 1 µs response time and user-configurable threshold (via external pull-up resistor) between 50%–240% of IPMAX. The ratiometric VOUT scales with VCC, maintaining accuracy under supply variation, and the TQFN-12 package provides galvanic isolation up to 100 VPK per IEC62368-1.

Key Specifications

Pinout & Package

TQFN-12 (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, halogen-free, 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 ACS712ELCTR-10A-T and TLE4971-2C5-S, the MCS1823GQTE-310BRN-Z uniquely combines ultra-compact TQFN-12 packaging, analog ratiometric output, and fully configurable OCD in a single chip-reducing component count and PCB area while preserving design flexibility for both analog and hardware-triggered protection schemes.

Availability

MCS1823GQTE-310BRN-Z is available at Aetrix Electronics and suitable for motor control, switch-mode power supplies, and over-current fault protection requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and volume production.

Supply support for MCS1823GQTE-310BRN-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 power management ICs, including DC-DC converters, LED drivers, and precision analog sensors.

The MCS1823 product line targets space- and efficiency-critical current sensing in motor drives, audio amplifiers, and power conversion-delivering galvanically isolated, high-bandwidth analog feedback without external components.

FAQ

What is the maximum continuous primary current the MCS1823GQTE-310BRN-Z can measure without saturation?

The device maintains linearity up to ±10 A (IPMAX), with analog output remaining proportional beyond that range until reaching saturation voltage limits (VCC – 0.3 V for 3.3 V supply). At ±10 A, output spans 0.33 V to 2.97 V (ratiometric mode), delivering full-scale resolution without clipping.

How is the over-current detection threshold set, and what is its accuracy?

The /OCD threshold is set by an external pull-up resistor (10–500 kΩ) from /OCD to VCC, allowing user-defined thresholds from 50% to 240% of ±10 A. Accuracy is ±10% of the programmed threshold, with 1 µs response time and 3–12% hysteresis to prevent chatter during marginal overloads.

Does the MCS1823GQTE-310BRN-Z require external calibration for zero-current offset?

No. The device uses spinning current cancellation and factory trimming to achieve ±10 mV zero-current offset over –40°C to +125°C, eliminating need for system-level null calibration. Offset drift is limited to ±5 mV over temperature, translating to <0.04 A error at 132 mV/A sensitivity.

Can the VOUT pin drive a standard 10 kΩ load directly?

Yes. VOUT is specified to drive ≥4.7 kΩ loads with full linearity and bandwidth. Driving a 10 kΩ load introduces negligible gain error (<0.1%) and preserves 120 kHz bandwidth, making it compatible with most microcontroller ADC inputs without buffering.

Is the TQFN-12 package thermally enhanced, and what is its thermal resistance?

Yes-the package includes an exposed thermal pad soldered to a PCB copper pour. Junction-to-board thermal resistance (θJB) is 35°C/W, enabling operation at full rated current in ambient temperatures up to +85°C with minimal heatsinking, as confirmed in MPS thermal characterization data.

What isolation rating does the MCS1823GQTE-310BRN-Z provide between primary current path and signal side?

It meets basic insulation per IEC62368-1 with a maximum working isolation voltage (VIOWM) of 100 VPK or 100 VDC. This supports safe operation in reinforced secondary-side sensing applications such as isolated SMPS feedback and low-voltage motor control, but not mains-referenced primary-side isolation.

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

Two spatially separated Hall elements sense opposing magnetic field gradients generated by the same current path. Their differential output cancels uniform external fields (e.g., from nearby inductors or cables), achieving >40 dB rejection of common-mode magnetic interference-validated per MPS application note AN-127.