STMicroelectronics TSC200IST

Overview

TSC200IST from STMicroelectronics is a high-side current sense amplifier with integrated open-drain comparator and 0.6 V internal reference, designed for overcurrent protection in automotive and industrial power rails. It delivers 20 V/V gain, operates from -16 V to +80 V common-mode input voltage, supports 2.7–18 V supply, and achieves ≤3.5% total output error over -40 °C to +125 °C - used in battery management systems for real-time shunt-based current monitoring.

For engineers reviewing the TSC200IST datasheet, TSC200IST pinout, TSC200IST application, or TSC200IST equivalent, key selection criteria include its AEC-Q100 qualification, latch-capable comparator with reset control, ±0.1% total output error at 120 mV sense voltage, 1 MHz bandwidth, and SO8 package compatibility with high-voltage PCB layout constraints.

Technical Context

The TSC200IST uses a dual-input-stage architecture (A1/A2 amplifiers) that automatically selects operation mode based on input common-mode voltage relative to VCC: Mode 1 activates when VICM > 40% VCC (e.g., 4.8 V at VCC = 12 V), enabling low-offset, high-accuracy sensing; Mode 2 engages when VICM < 40% VCC, using current-mirror-based signal conversion with slightly reduced CMRR.

Its comparator features 586–625 mV threshold, 9 mV hysteresis, 0.3 µs response time, and latching behavior controlled by active-low RESET. The open-drain CMPOUT supports pull-up to 2.7–18 V independent of VCC, enabling direct interface with 3.3 V or 5 V logic while monitoring 48 V or 60 V bus rails.

Key Specifications

Pinout & Package

Available in SO8 package (5.0 mm × 4.0 mm, 1.27 mm pitch), thermally optimized for high-power density layouts with exposed pad option (TSC200IST variant). Pin mapping validated per DS13882 Rev 3 Figure 2 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR, TSC200IST integrates comparator and reference to reduce component count and improve fault-response determinism; compared with TSC201IST, it trades gain for improved noise immunity and wider dynamic range in medium-current applications (5–40 A).

Availability

TSC200IST is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, and telecom power distribution requiring stable component supply across extended temperature and voltage ranges.

Supply support for TSC200IST 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, specializing in automotive-grade analog, power, and microcontroller solutions with vertical manufacturing and AEC-Q100 validation infrastructure.

The TSC200IST belongs to ST's high-voltage current sense amplifier product line, engineered specifically for robust overcurrent protection in automotive power distribution and industrial energy conversion systems.

FAQ

What is the minimum shunt resistor value supported for accurate measurement?

The TSC200IST achieves ±0.1% total output error at 120 mV sense voltage, corresponding to a minimum practical shunt of 3 mΩ at 40 A full-scale. Below 20 mV differential input, accuracy degrades due to transconductance loss in Mode 1/2 transition; design guidance recommends maintaining VSense ≥ 25 mV for production systems.

How does the RESET pin behave during power-up?

The RESET pin has an internal 2 MΩ pull-down; when left unconnected or grounded, the comparator powers up in reset state (CMPOUT = low). If pulled high at power-up, CMPOUT asserts high and requires an active-low pulse ≥0.1 µs to enter normal latched operation - this behavior is defined by the POR threshold of 1.5 V on VCC.

Can the TSC200IST be used for low-side current sensing?

Yes - the device supports both high-side and low-side configurations. For low-side use, connect VIN+ to shunt high side (load side) and VIN− to shunt low side (GND side); common-mode voltage becomes near 0 V, placing operation in Mode 2 with verified 3.5% max error and 100–120 dB CMRR per datasheet Table 4.

What is the maximum capacitive load the OUT pin can drive without instability?

The OUT pin specifies a maximum capacitive load of 10 nF with no sustained oscillation, validated per DS13882 Table 4. Driving larger loads (e.g., ADC input capacitance + PCB trace) requires series resistance (≥10 Ω) or buffer amplification; 5 pF load yields 2 µs settling time to 1% final value, critical for sampled-data systems.