Texas Instruments TSM102ID

Overview

TSM102ID from STMicroelectronics is a monolithic voltage and current controller IC integrating two operational amplifiers, two comparators, and an adjustable precision voltage reference (2.5 V, 0.4% initial accuracy, 22 ppm/°C TC) in a single SO-16 package. It operates from 3 V to 36 V supply, delivers 200 µA/amp quiescent current, supports 2.1 MHz gain-bandwidth, and enables dual-loop regulation in switch-mode power supplies with ±1 mV input offset and 250 mV low-side output saturation at 4 mA.

For engineers reviewing the TSM102ID datasheet, TSM102ID pinout, TSM102ID application, or TSM102ID equivalent, this device serves as a space-optimized analog controller for battery charger feedback, SMPS voltage/current regulation, and precision reference-based monitoring where rail-to-rail input common-mode range (including ground), latch-up immunity, and sink capability up to 16 mA are critical.

Technical Context

The TSM102ID implements a fully integrated analog control subsystem: its two op-amps provide independent voltage and current error amplification with 25 V/mV large-signal gain and 1.6–2 V/µs slew rate; its two comparators feature 1.3 µs response time (100 mV step), TTL-compatible outputs, and programmable hysteresis via external resistors.

The on-chip 2.5 V reference offers adjustable output up to 36 V via external resistor divider, maintains ±7 mV total deviation over –40°C to +125°C, and delivers 1–100 mA sink current with 1.5–3 µA input bias - enabling direct use in precision feedback loops without external reference buffering.

Key Specifications

Pinout & Package

Package: SO-16 (Plastic Micropackage), 10.0 mm × 6.0 mm × 1.75 mm body, 1.27 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL494CN and UC3525AN, the TSM102ID provides complete analog control functionality in one package - eliminating six external components typically needed for reference, comparison, and error amplification - while consuming less than 20% of their quiescent power and supporting ground-sensed current measurement.

Availability

TSM102ID is available at Aetrix Electronics and suitable for battery charger feedback, SMPS voltage regulation, and industrial power supply monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TSM102ID 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSM102ID belongs to ST's analog power management IC portfolio, engineered specifically for compact, high-precision feedback control in offline and DC-DC power converters where integration, accuracy, and reliability are essential.

FAQ

What is the maximum output voltage achievable using the TSM102ID's adjustable reference?

The TSM102ID's reference cathode (Pin 16) supports output voltages from 2.5 V up to 36 V, determined by the external resistor divider ratio. With VKA = Vref × (1 + R1/R2), a 36 V output requires R1/R2 ≈ 13.4. The reference maintains 0.4% accuracy and ±22 ppm/°C tempco across this full range when IK is maintained between 1 mA and 100 mA.

Can the TSM102ID operate with a single 3.3 V supply?

No - the TSM102ID requires minimum 3 V supply but its internal reference and comparators are specified for operation only above 4.5 V. At 3.3 V, the reference fails to regulate (VKA < Vref), op-amp output swing collapses below 1 V, and comparator propagation delay exceeds 10 µs. Valid operation starts at VCC+ ≥ 4.5 V, with full performance guaranteed from 5 V to 36 V.

How does the TSM102ID achieve latch-up immunity?

Latch-up immunity is implemented via ST's proprietary silicon process and internal guard-ring structures that prevent parasitic SCR activation during transient overvoltage or ESD events. This is validated per JEDEC JESD78 Class II (100 mA), allowing reliable operation in noisy industrial environments without external protection diodes on VCC+ or reference pins.

Is the TSM102ID pin-compatible with the TSM102AID variant?

Yes - both TSM102ID and TSM102AID use identical SO-16 packaging and pinout. The sole difference is reference accuracy: TSM102ID guarantees 1% initial tolerance (2.475–2.525 V), while TSM102AID guarantees 0.4% (2.490–2.510 V). All electrical characteristics, timing, and functional behavior are otherwise identical.