103AIW

Product Overview

103AIW is commonly associated with STMicroelectronics TSM103AIW / TSM103W series devices, where 103AIW is often used as a top marking or shortened marking-style reference. The device is a monolithic IC that combines operational amplifier functions with an internal 2.5V voltage reference, providing a compact solution for power supply control, feedback regulation and monitoring circuits. With wide supply voltage operation, low input offset voltage, low supply current, medium bandwidth and SO-8 / wide SO package options depending on the exact ordering code, it is suitable for battery chargers, AC-DC adapters, SMPS feedback circuits, power management boards, data acquisition systems and legacy power supply repair applications.

Key Features

• Manufacturer: STMicroelectronics

• Marking / Short Part Number: 103AIW

• Full / Related Part Number: TSM103AIW, TSM103W, TSM103A and related variants

• Device Type: Dual operational amplifier with internal voltage reference

• Product Category: Linear IC / operational amplifier and voltage reference

• Amplifier Function: Includes independent operational amplifier functions for control and feedback circuits

• Voltage Reference: Integrated 2.5V fixed voltage reference

• Supply Voltage: Wide supply voltage range, commonly 3V to 32V depending on datasheet version

• Input Offset Voltage: Low input offset voltage, 0.5mV typical for TSM103A class versions

• Supply Current: Low supply current, around 350µA per amplifier at 5V class operation

• Bandwidth: Medium bandwidth, around 0.9MHz unity-gain bandwidth depending on version

• Output Swing: Large output voltage swing from ground to near positive supply depending on load condition

• Input Common Mode Range: Input common mode voltage range includes ground

• Reference Output Current: 1mA to 100mA sink current capability depending on operating condition

• Package Options: SO-8 / wide SO-8 package variants depending on full ST ordering code

• Mounting Type: Surface mount

• Key Features: Operational amplifier functions, integrated 2.5V voltage reference, wide supply voltage range, low offset, low current consumption and compact SO-8 package support

• Typical Use: Power supply control, SMPS feedback, battery chargers, AC-DC adapters, voltage monitoring, current sensing, data acquisition and repair applications

• Status Note: Some TSM103 / TSM103A variants may be legacy or not recommended for new design; buyers should check the latest ST replacement guidance when required

• Ordering / Packaging Note: 103AIW is usually a shortened top-marking reference for TSM103AIW / TSM103W variants; buyers should verify the full ST ordering code, package suffix, temperature grade, top marking, packing format and datasheet revision before production or repair use.

Applications

103AIW can be used in electronic systems that require operational amplifier control together with a stable 2.5V voltage reference for power management and feedback regulation. Typical applications include battery chargers, AC-DC power adapters, switching power supplies, SMPS secondary-side feedback circuits, current sensing circuits, voltage monitoring boards, data acquisition systems, industrial control boards, consumer electronics, maintenance projects and legacy power supply repair. It is also suitable for BOM review where an ST TSM103 family operational amplifier and voltage reference IC is required.

Quality & Sourcing

Antrex Electronics can support 103AIW sourcing with stock availability checks, RFQ quotation, package confirmation, date code review and shipment arrangement. For project-based purchasing, buyers can provide quantity, target price, required date code, packaging requirements and application information for faster quotation support.

For quality control, Antrex Electronics can help arrange product photos, label review, visual inspection and third-party testing support when required. OEMs, EMS providers, repair centers and electronic component buyers are welcome to send BOM lists or hard-to-find part requests for sourcing assistance.