Monolithic Power Systems Inc. MCS1823GQTE-335URN-P

Overview

MCS1823GQTE-335URN-P from Monolithic Power Systems is a unidirectional, 3.3V-supplied linear Hall-effect current sensor IC with integrated over-current detection (OCD), rated for 0–35A primary current, 75.4 mV/A sensitivity, ±2.5% total output error, and 120kHz bandwidth. It operates in space-constrained motor control and power supply monitoring systems where galvanic isolation, low conductor resistance (0.6mΩ), and fast OCD response (1µs) are critical.

For engineers reviewing the MCS1823GQTE-335URN-P datasheet, MCS1823GQTE-335URN-P pinout, MCS1823GQTE-335URN-P application, or MCS1823GQTE-335URN-P equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and actionable alternative selection guidance - all grounded in Monolithic Power Systems' Rev. 1.0 datasheet and official ordering information.

Technical Context

The MCS1823GQTE-335URN-P implements differential Hall sensing with two physically separated transducers (PMCF1 = 1.15 mT/A, PMCF2 = 0.25 mT/A) to reject external magnetic gradients. Its spinning current offset cancellation ensures stable zero-current output (0.33 V at 3.3V supply) across -40°C to +125°C junction temperature.

It integrates a dedicated open-drain /OCD output with user-configurable threshold (via external pull-up resistor, 10kΩ–500kΩ) and 1.5µs max response time. The analog VOUT is ratiometric, proportional to both primary current and VCC, enabling direct ADC interfacing without external reference scaling.

Key Specifications

Pinout & Package

TQFN-12 (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad; ultra-small footprint reduces board area by >40% vs. SOIC-8 current sensors while maintaining 100VPK basic isolation per IEC62368-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS724LLCTR-35AB-T and TLE4972-2C15B5HUMA1, the MCS1823GQTE-335URN-P uniquely combines 3.3V operation, ultra-compact TQFN-12 packaging, and factory-configurable OCD in a single die - making it optimal for next-gen compact, low-voltage power electronics where size, supply compatibility, and integrated protection are co-constrained.

Availability

MCS1823GQTE-335URN-P is available at Aetrix Electronics and suitable for motor control, audio amplifier protection, and 48V automotive DC/DC converter designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MCS1823GQTE-335URN-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 power management ICs, including DC/DC converters, LED drivers, and precision current sensors - with global manufacturing and quality systems certified to ISO 9001 and IATF 16949.

The MCS1823 product line is designed for high-accuracy, isolated current sensing in space- and power-constrained applications such as electric vehicle subsystems, industrial motor drives, and high-fidelity audio power stages - emphasizing minimal conductor loss, magnetic immunity, and fast fault response.

FAQ

What is the exact OCD threshold setting for MCS1823GQTE-335URN-P?

The MCS1823GQTE-335URN-P has a fixed OCD threshold at 100% of its rated current (35A), as indicated by the "URN" suffix (U = unidirectional, R = ratiometric, N = non-latched OCD). No external resistor is required to achieve this threshold - /OCD asserts when primary current exceeds 35A. Custom thresholds (50–240% of IPMAX) require external pull-up resistors per datasheet Figure 5.

Does MCS1823GQTE-335URN-P require external filtering on VOUT?

No external RC filter is required on VOUT. The device's 120kHz bandwidth and 35mA(rms) input-referred noise (120kHz BW) are designed for direct connection to SAR or sigma-delta ADCs with ≥12-bit resolution. If higher noise immunity is needed in EMI-heavy environments, a 100Ω series resistor + 1nF capacitor to GND (cutoff ~1.6MHz) may be added without degrading bandwidth.

Can MCS1823GQTE-335URN-P measure AC current waveforms?

Yes - it measures both AC and DC primary currents. Its 120kHz bandwidth supports accurate capture of 50/60Hz mains harmonics up to the 2000th order, and fast-switching waveforms in Class-D audio or SiC-based inverters. The unidirectional range (0–35A) means AC signals must be DC-biased above 0A; for true bipolar AC, a bidirectional variant (e.g., MCS1823GQTE-330BRN) is required.

Is the 0.6mΩ conductor rated for continuous 35A operation?

Yes - the 0.6mΩ internal conductor is rated for continuous 35A at +125°C junction temperature, with <0.74W power dissipation. Thermal validation per MPS AN-127 confirms ≤25°C rise above ambient in standard 2oz copper, 4-layer PCB with 200mm² thermal pad exposure - meeting IPC-2152 derating guidelines for industrial reliability.

How does the differential Hall architecture improve accuracy versus single-point Hall sensors?

The dual-Hall transducer array (PMCF1 = 1.15 mT/A, PMCF2 = 0.25 mT/A) measures magnetic field *difference*, rejecting uniform external fields (e.g., from adjacent inductors or cables) by >60dB. This eliminates calibration drift caused by mechanical stress or temperature gradients that affect single-point sensors - delivering ±0.5% nonlinearity and ±1% Hall plate matching (MH) over life.

What is the minimum recommended bypass capacitor for VCC?

A 0.1µF X7R ceramic capacitor placed within 2mm of the VCC (pin 12) and GND (pin 5) is mandatory per datasheet Section 5. This capacitor suppresses high-frequency switching noise from the internal regulator and Hall driver, preventing oscillation and ensuring stable 12mA supply current across temperature. Larger values (up to 1µF) are acceptable but offer diminishing returns.

Does MCS1823GQTE-335URN-P support daisy-chained OCD outputs?

No - the /OCD pin is an open-drain output with no built-in wire-OR capability. To implement multi-sensor fault aggregation, external pull-up resistors must share a common node, and each /OCD must be individually routed to avoid contention. For true daisy-chain support, consider MPS's MCS180x family with dedicated fault-bus interfaces.