Texas Instruments TSM102AID

Overview

TSM102AID from STMicroelectronics is a monolithic voltage and current controller IC integrating two operational amplifiers, two comparators, and a precision adjustable voltage reference (2.500 V ±0.4% at 10 mA, 22 ppm/°C TC). It operates from 3 V to 36 V supply, draws only 1.5 mA total supply current, and supports rail-to-rail input common-mode range including ground. It is used in SMPS battery chargers for simultaneous voltage regulation, current limiting, low-battery detection, and end-of-charge signaling.

For engineers reviewing the TSM102AID datasheet, TSM102AID pinout, TSM102AID application, or TSM102AID equivalent, key selection criteria include its dual op-amp/comparator architecture, 2.1 MHz gain-bandwidth product, 250 mV low-level output saturation voltage at 4 mA, 1.3 µs comparator response time, and SO-16 package compatibility with space-constrained power management PCB layouts.

Technical Context

The TSM102AID implements a fully integrated analog control subsystem: each op-amp provides closed-loop current/voltage regulation via external sense resistors and feedback dividers, while the comparators generate digital status flags (e.g., "Low Battery", "End of Charge") with hysteresis support. The internal 2.5 V reference serves as a stable, temperature-compensated source for all analog thresholds and feedback references.

All functional blocks share a single 36 V-tolerant supply rail and operate over –40°C to +125°C. The op-amps feature 2.1 MHz GBP, 1.6 V/µs slew rate, and 70–90 dB CMRR; comparators deliver 300 ns large-signal response with 6 mA sink capability and 250–700 mV VOL across temperature.

Key Specifications

Pinout & Package

Package: SO-16 (Plastic Micropackage), 10.0 mm × 6.2 mm body, 1.27 mm pitch, 1.65 mm height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage/current controller applications.

Compared with TL494CN and UC3843BD1R2G, the TSM102AID delivers complete analog control functionality in one SO-16 package-reducing design time by eliminating external reference, comparator, and op-amp selection, while enabling tighter voltage/current regulation accuracy through shared reference tracking.

Availability

TSM102AID is available at Aetrix Electronics and suitable for lithium-ion battery chargers, industrial DC-DC converter monitoring, and AC-DC adapter feedback controllers requiring stable component supply, precise analog control integration, and extended temperature operation.

Supply support for TSM102AID 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 devices for automotive, industrial, and consumer markets.

The TSM102AID belongs to ST's analog power management portfolio, engineered specifically for compact, high-precision power supply supervision and battery charging control in space-constrained industrial and portable systems.

FAQ

What is the maximum allowable supply voltage for TSM102AID?

The absolute maximum DC supply voltage (V_CC+ to V_CC–) is 36 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent damage to the internal ESD structures and reference bandgap. For reliable 36 V operation, ensure V_CC– remains at ground potential and transient spikes are clamped below 40 V with external TVS diodes.

Can TSM102AID generate a 5 V reference output?

Yes - by connecting an external resistor between Pin 16 (V_REF Cathode) and V_CC+, the internal 2.5 V reference is amplified per V_OUT = 2.5 V × (1 + R_EXT/R_INT). To achieve 5 V, use R_EXT = R_INT ≈ 24 kΩ (standard value), yielding V_OUT = 5.00 V ±0.8% over temperature. The cathode current must remain between 1 mA and 100 mA for regulation.

How does the TSM102AID handle input common-mode voltage near ground?

The op-amps and comparators feature rail-to-rail input stages with common-mode range extending to V_CC– (ground). This allows direct connection of low-side current-sense resistors and ground-referenced voltage dividers without level-shifting circuitry-critical for accurate current measurement in battery discharge paths and grounded-output DC-DC converters.

Is TSM102AID pin-compatible with TSM102ID?

Yes - both TSM102AID and TSM102ID use identical SO-16 packaging and pinout. The "A" suffix denotes ±0.4% reference accuracy (vs. ±1% for standard TSM102ID), but all electrical connections, thermal characteristics, and functional block mapping are identical. No PCB redesign is needed when upgrading to the tighter-tolerance variant.