STMicroelectronics TSC101AIYLT

Overview

TSC101AIYLT from STMicroelectronics is an automotive-grade high-side current sense amplifier with fixed 20 V/V gain, operating across 4–24 V supply and 2.8–30 V input common-mode voltage ranges, surviving up to 60 V load-dump transients, and consuming ≤300 µA quiescent current in SOT23-5 package - used for precision battery charge monitoring and motor phase current sensing in 12 V/24 V vehicle subsystems.

For engineers reviewing the TSC101AIYLT datasheet, TSC101AIYLT pinout, TSC101AIYLT application, or TSC101AIYLT equivalent, this device supports ground-referenced output of high-side shunt measurements independent of supply voltage, enabling robust current sensing in automotive power distribution modules, DC motor controllers, and photovoltaic charge regulators where common-mode voltage exceeds VCC.

Technical Context

The TSC101AIYLT implements a precision current-sense architecture with fully differential input stage referenced to Vm, internal resistor-ratio gain setting (Rg3/Rg1 = 20), and buffered rail-to-rail output stage. Its input common-mode range (2.8–30 V) is electrically isolated from VCC, allowing operation with VCC as low as 4 V while sensing currents on 24 V or 30 V rails.

It delivers 90–105 dB CMR and SVR over temperature, ±0.9 mV max input offset at −40°C to +125°C, and 3 µs settling time to 1% for 10–100 mV step inputs with 47 pF load - optimized for closed-loop feedback in battery management ICs and motor gate drivers requiring fast, stable current telemetry.

Key Specifications

Pinout & Package

SOT23-5L package (ECOPACK® compliant, automotive grade), 1.45 mm max height, 2.90 mm × 2.80 mm footprint, thermal resistance R_thJA = 250 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current sensing applications.

Compared with MAX4080TASA+ and INA240A1QDRQ1, the TSC101AIYLT offers lowest quiescent current (300 µA vs. ≥2.4 mA), native 4–24 V VCC compatibility, and AEC-Q100 Grade 1 certification - making it optimal for always-on automotive subsystems where power budget and qualification are critical.

Availability

TSC101AIYLT is available at Aetrix Electronics and suitable for automotive battery management, DC motor control, and photovoltaic charge regulation requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TSC101AIYLT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for automotive, industrial, and consumer markets.

The TSC101 belongs to ST's precision analog current sensing portfolio, engineered specifically for high-reliability automotive and industrial power monitoring where independence between sensed rail and supply voltage is mandatory.

FAQ

What is the maximum continuous common-mode voltage the TSC101AIYLT can measure?

The TSC101AIYLT operates continuously with input common-mode voltages from 2.8 V to 30 V. It survives absolute maximum common-mode transients up to 60 V on Vp and Vm pins - such as ISO 7637-2 Pulse 5a load-dump events - without damage or latch-up, provided external protection diodes are omitted per ST's recommended layout.

Can the TSC101AIYLT be powered from the same rail it is sensing?

No - the TSC101AIYLT requires separate VCC and sensed rail connections. Its VCC pin must be supplied independently (4–24 V), while Vp and Vm connect across the shunt on the high-voltage rail. This architectural separation enables sensing 30 V bus current using only a 5 V microcontroller supply, eliminating level shifters or isolated supplies.

How does the 20 V/V gain affect shunt resistor selection?

With 20 V/V gain, a 50 mV full-scale shunt voltage produces 1.0 V output - ideal for 3.3 V ADCs with 12-bit resolution (244 µV LSB). For 10 A full-scale current, use R_sense = 5 mΩ; for 100 A, use 0.5 mΩ. Gain error (±2.5%) and offset (±0.9 mV) define total unadjusted accuracy, which remains stable across −40°C to +125°C.

Is external compensation required for stability with capacitive loads?

No - the TSC101AIYLT is internally compensated for loads up to 47 pF, matching typical PCB trace capacitance and short (<10 cm) connections to MCU ADC inputs. ST explicitly warns against exceeding 47 pF; larger capacitors cause peaking or oscillation. No external RC network or series resistor is needed for standard implementations.