STMicroelectronics TSC1021BIYPT

Overview

TSC1021BIYPT from STMicroelectronics is a high-side current sense amplifier with fixed 50 V/V gain, operating over -40 °C to 125 °C, supporting 2.8 V to 30 V common-mode input range independent of 3.5–5.5 V supply, ±2.3 mV max input offset voltage, and 300 µA max supply current - deployed in automotive battery monitoring and industrial SMPS current feedback loops.

For engineers reviewing the TSC1021BIYPT datasheet, TSC1021BIYPT pinout, TSC1021BIYPT application, or TSC1021BIYPT equivalent, key selection criteria include reverse-battery survival (-32 V), load-dump tolerance (60 V), EMI filtering integration, output accuracy (±2.5 % over temperature), and TSSOP8 package compatibility with space-constrained PCB layouts.

Technical Context

The TSC1021BIYPT implements a precision current-sense architecture with rail-to-rail input stage enabling high-side sensing at voltages far exceeding its 5 V supply. Its differential input rejects common-mode transients up to ±32 V reversal and 60 V load-dump spikes while maintaining DC CMR ≥90 dB and AC CMR ≥75 dB (1 kHz).

It integrates an internal buffer for low-impedance ground-referenced output, supports ±10 mV to ±100 mV sense voltage inputs, delivers 800 kHz bandwidth and 0.45 V/µs slew rate, and achieves 100 ppm/°C output drift - all within 300 µA quiescent current.

Key Specifications

Pinout & Package

Housed in a RoHS-compliant, ECOPACK®-qualified TSSOP8 package (3.0 × 4.4 mm, 0.65 mm pitch), the TSC1021BIYPT features thermal resistance R_thJA = 120 °C/W and operates up to 150 °C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and TSC103IYPT, the TSC1021BIYPT delivers best-in-class EMI immunity and automotive ruggedness in the smallest footprint, trading off some offset drift performance for lower cost and proven field reliability in 12 V/24 V platforms.

Availability

TSC1021BIYPT is available at Aetrix Electronics and suitable for automotive battery management, industrial SMPS current feedback, and notebook adapter protection requiring stable component supply and long-term lifecycle support.

Supply support for TSC1021BIYPT 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 TSC1021 belongs to ST's high-voltage precision analog amplifier product line, engineered specifically for robust current sensing in harsh automotive and industrial environments with emphasis on transient immunity and AEC-Q100 compliance.

FAQ

What is the maximum allowable differential input voltage (Vsense) for TSC1021BIYPT?

The absolute maximum differential input voltage (Vp − Vm) is ±20 V per datasheet Table 2. However, for guaranteed accuracy and linear operation, Vsense must remain within ±100 mV - beyond which output saturation occurs. At ±100 mV input, the 50 V/V gain yields ±5 V output, aligning with typical 5 V ADC full-scale ranges.

Does TSC1021BIYPT require external compensation components?

No external compensation is required. The device is internally compensated for unity-gain stability with 47 pF load capacitance, as validated in Figure 12 (step response) and Figure 13 (Bode diagram). Adding series resistance >10 Ω at the Out pin may induce peaking; layout should minimize trace capacitance to preserve 800 kHz bandwidth.

How does the TSC1021BIYPT handle reverse-battery conditions?

It withstands -32 V applied simultaneously to Vp and Vm pins (relative to GND) without damage or parametric shift, verified per AEC-Q100 stress testing. Internal protection diodes clamp reverse current, and the input stage remains functional after recovery - critical for 12 V automotive systems where jump-start polarity errors occur.

Can TSC1021BIYPT be used with a 3.3 V supply instead of 5 V?

Yes - VCC range is 3.5 V to 5.5 V. At 3.3 V, output swing is reduced: Voh ≈ 185 mV (vs. 135 mV at 5 V), Vol ≈ 165 mV, limiting dynamic range. Total accuracy degrades slightly (±2.7 % typical), but functionality is preserved. For 3.3 V systems, verify that output headroom meets downstream ADC input requirements.