STMicroelectronics TSC101CIYLT

Overview

TSC101CIYLT from STMicroelectronics is an automotive-grade high-side current sense amplifier with fixed 100 V/V gain, operating from 4–24 V supply and supporting 2.8–30 V input common-mode voltage independent of VCC. It delivers ±1.5 mV max input offset voltage, 90–105 dB CMR, and 300 µA max supply current in SOT23-5 package. Used for precision battery charger and photovoltaic system current monitoring where high common-mode rejection and low quiescent power are critical.

For engineers reviewing the TSC101CIYLT datasheet, TSC101CIYLT pinout, TSC101CIYLT application, or TSC101CIYLT equivalent, key selection criteria include its AEC-Q100 qualification, 60 V load-dump survival, buffered rail-to-rail output, and gain-specific accuracy (±4.5% total output error at 50 mV sense voltage) - all validated across −40°C to +125°C.

Technical Context

The TSC101CIYLT implements a precision current-sense architecture with fully differential input stage and internal resistor-ratio gain setting (100 V/V), eliminating external gain-setting components. Its input common-mode range (2.8–30 V) operates independently of VCC, enabling high-side sensing in systems where bus voltage exceeds supply rail - e.g., 48 V automotive subsystems powered from 5 V LDO.

It features a buffered output stage capable of sourcing up to 26 mA and sinking up to 60 mA, with 0.8 V high-state saturation and 100 mV low-state saturation at 1 mA load. Output settling time is 10 µs to 1% for the C-grade variant, supported by 450 kHz small-signal bandwidth and 0.55 V/µs slew rate under 47 pF load.

Key Specifications

Pinout & Package

SOT23-5L package (ECOPACK® compliant), 2.9 mm × 2.8 mm × 1.3 mm body, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1, TSC101CIYLT offers higher gain and superior CMR for compact high-voltage sensing; versus TSC101BIYLT, it trades 0.6 mV lower offset for doubled gain, enabling smaller shunts and improved SNR in high-current applications.

Availability

TSC101CIYLT is available at Aetrix Electronics and suitable for automotive battery management, photovoltaic monitoring, industrial DC motor control, and high-efficiency battery charger designs requiring stable component supply across extended temperature and high-reliability environments.

Supply support for TSC101CIYLT 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The TSC101 belongs to ST's precision analog current-sense amplifier product line, engineered specifically for high-side sensing in harsh environments where common-mode voltage independence, AEC-Q100 compliance, and ultra-low quiescent current are mandatory.

FAQ

What is the maximum common-mode voltage the TSC101CIYLT can survive during load-dump events?

The TSC101CIYLT survives −0.3 V to 60 V common-mode voltage per absolute maximum ratings, making it compatible with ISO 7637-2 Pulse 5a/b load-dump tests in 12 V and 24 V automotive systems without external clamping diodes. This rating applies to both Vp and Vm pins referenced to Gnd.

Does the TSC101CIYLT require external gain-setting resistors?

No. The TSC101CIYLT has internally fixed 100 V/V gain; no external resistors are needed. This eliminates gain tolerance errors, layout sensitivity, and thermal drift associated with external networks - confirmed in Table 6 and Section 5 of the datasheet.

Can the TSC101CIYLT operate with VCC lower than the common-mode voltage?

Yes. Its input common-mode voltage (2.8–30 V) is fully independent of VCC (4–24 V). For example, it can sense current on a 24 V bus while powered from a 5 V LDO - a core feature verified in Figure 1 and Table 3 of the datasheet.

What is the output voltage accuracy at 100 mV sense voltage?

At Vsense = 100 mV, the total output voltage accuracy is ±5% (max) across −40°C to +125°C, as specified in Table 6. This includes contributions from gain error, input offset, and drift - distinct from the ±4.5% value at 50 mV due to nonlinearity effects.