---
title: "Allegro MicroSystems launches a single-chip 48-volt power chip it says cuts the parts bill by up to half"
description: "The A81481 power management chip is Allegro's bid for the steering and braking sockets that 48-volt wiring opens, turf Texas Instruments is also working. The stock fell 14.2% the day the chip arrived and has bounced since; the December quarter decides who is right."
publisher: "The Inference"
section: "Chips"
published: 2026-11-13T22:07:53.941Z
modified: 2026-11-13T22:07:53.941Z
canonical: https://theinference.org/article/allegro-microsystems-launches-a-single-chip-48-volt-power-chip-it-says-cuts-the-parts-bill-by-up-to-half
language: en
keywords: "Allegro Microsystems, Semiconductors, Automotive, Power Management, 48 Volt"
---

# Allegro MicroSystems launches a single-chip 48-volt power chip it says cuts the parts bill by up to half

> The A81481 power management chip is Allegro's bid for the steering and braking sockets that 48-volt wiring opens, turf Texas Instruments is also working. The stock fell 14.2% the day the chip arrived and has bounced since; the December quarter decides who is right.

On November 5, [Allegro MicroSystems](https://theinference.org/markets/companies/allegro-microsystems) (Nasdaq: ALGM), the New Hampshire maker of magnetic sensor and power chips, announced the four parts it wants inside the steering and braking electronics of 48-volt cars: two motor gate drivers that share one board footprint and software register map across 12-volt and 48-volt platforms, a magnet-free steering torque sensor, and the A81481, which Allegro calls the industry's first single-chip true 48-volt power management IC [1].

The A81481 packs two buck converters, five low-dropout regulators and top-grade ASIL D safety diagnostics, the strictest automotive functional-safety level, onto one die where today's designs stack several chips, and Allegro says it cuts the 48-volt parts bill by up to 50% [1]. The portfolio is on the floor at electronica in Munich through today, November 13 [1].

## Cars still pay the bills

The greeting was a beating. ALGM closed launch day down 14.2% at $26.80 after five banks cut their price targets by an average of 13.8%, [Evercore](https://theinference.org/markets/companies/evercore)'s from $53 to $40 [2]. That followed a October 29 drop of about 7%, which came despite a quarter that beat every estimate [3].

Cars remain the base of the business: $172.5 million of [the September quarter's $276.9 million in sales](https://markets.businessinsider.com/news/stocks/allegro-microsystems-reports-second-quarter-2027-results-1036684342), about 62%, while data-center-driven industrial sales jumped 79% [4]. The Inference covered that print [on October 29](https://theinference.org/article/allegro-microsystems-grew-sales-29-to-277-million-without-sizing-its-data-center-revenue); the open question was where car content growth comes from [4].

*Chart: **Sales have climbed seven straight quarters off the inventory-glut trough** Line chart of Allegro MicroSystems quarterly net sales from Q4 2023 to Q3 2026, falling to a trough of $177.9M in Q4 2024 and rising seven straight quarters to a record $276.9M*

*Quarterly net sales, US$ millions, from Allegro's SEC filings; calendar quarters shown, latest is fiscal Q2 2027 ended September 25, 2026. [4][10]*

As automakers rewire cars into 48-volt zones, grouping electronics by location to shed copper weight, the steering and braking power sockets are being assigned, and [Texas Instruments](https://theinference.org/markets/companies/texas-instruments) already sells [its own broad 48-volt line](https://www.ti.com/en-us/applications/automotive/48v-in-automotive), including a preview three-phase gate driver that overlaps Allegro's new parts [5]. [Automotive World](https://www.automotiveworld.com/news/allegro-unveils-single-chip-48v-power-management-device/) frames the bet plainly: that automakers will pay for one design spanning both voltages [6].

## What the cuts were pricing

[The December-quarter guide](https://finance.yahoo.com/markets/stocks/articles/allegro-microsystems-sinks-7-despite-131307357.html) is the sore point. Sales of $278 million to $288 million imply growth slowing to 23% from 29%, and after the run-up investors wanted more than a 2% step up [3]. Against that, design wins came in at their highest level since the 2020 IPO, up nearly 40%, and bookings rose for an eighth straight quarter [4].

*Chart: **The December guide slows growth to about 23%, from 29% just delivered** Column chart of Allegro MicroSystems year-over-year revenue growth by quarter from Q2 2025 to Q3 2026, ranging from 14.4% to 29.2%, with the December 2026 quarter's guide plotted as an estimate of about 23.5% and a range of 21.3% to 25.7%*

*Year-over-year change in net sales, percent. Reported quarters from Allegro's SEC filings; the December quarter is the company's own guide of $278 million to $288 million in sales against $229.2 million a year earlier, plotted at the $283 million midpoint with the range the guide implies. [3][11]*

## A claim is not a socket

None of the launch is booked revenue. The 50% saving is Allegro's own figure, the same number it attached to the same A81481 at its [October 20 debut in humanoid robots](https://markets.businessinsider.com/news/stocks/allegro-microsystems-unveils-48v-power-and-precision-sensing-solutions-to-enhance-physical-ai-in-humanoid-robotics-1036643483) [7]. Insiders sold $5.2 million of stock over the past year without buying, and the trailing price-to-earnings multiple stands at 195.8 [8].

On the other side sit the cut targets, still averaging $44 against a $32.11 close on November 11, and a seven-day rebound of 18.3% that analysts partly credit to this portfolio before a chip-heavy slide left the shares at $29.94 by midday today [2][8][9][7].

The December quarter is the tell: gross margin at the 52.5% top of the guide, and 48-volt steering or braking sockets named as design wins [3]. A steering socket is won once, and the chip that wins it ships for the life of the platform.

## Takeaway

Allegro's single-chip 48-volt part is a genuine pitch for the steering and braking sockets 48-volt wiring opens, but with no revenue booked and the stock at 195.8 times trailing earnings, the December guide rather than the datasheet is what has to hold.

## Sources

1. [Allegro MicroSystems press release, 48V Power and Precision Sensing Solutions for Next-Generation ADAS, 5 November 2026](https://www.allegromicro.com/en/about-allegro/newsroom/press-releases/2026/48v-power-and-precision-sensing-solutions-for-adas)
2. [AlphaStreet, Allegro MicroSystems Plunges 14.2% After UBS Maintains Buy, 5 November 2026](https://news.alphastreet.com/allegro-microsystems-plunges-14-2-after-ubs-maintains-buy/)
3. [Yahoo Finance (TIKR), Allegro MicroSystems Sinks 7% Despite Earnings Beat as Demand Signals Strengthened Significantly, 30 October 2026](https://finance.yahoo.com/markets/stocks/articles/allegro-microsystems-sinks-7-despite-131307357.html)
4. [Allegro MicroSystems Q2 FY2027 results press release via Markets Insider, 29 October 2026](https://markets.businessinsider.com/news/stocks/allegro-microsystems-reports-second-quarter-2027-results-1036684342)
5. [Texas Instruments, 48V in automotive application page, accessed 13 November 2026](https://www.ti.com/en-us/applications/automotive/48v-in-automotive)
6. [Automotive World, Allegro unveils single-chip 48V power management device, 5 November 2026](https://www.automotiveworld.com/news/allegro-unveils-single-chip-48v-power-management-device/)
7. [Allegro MicroSystems robotics press release via Markets Insider, 20 October 2026 (page carries live ALGM quote, 13 November 2026)](https://markets.businessinsider.com/news/stocks/allegro-microsystems-unveils-48v-power-and-precision-sensing-solutions-to-enhance-physical-ai-in-humanoid-robotics-1036643483)
8. [GuruFocus, Is It Too Late to Buy Allegro Microsystems (ALGM) After 4.6% Rally?, 11 November 2026](https://www.gurufocus.com/news/9193713/is-it-too-late-to-buy-allegro-microsystems-inc-algm-after-46-rally-gf-value-says-undervalued)
9. [Yahoo Finance (Simply Wall St), Allegro MicroSystems Rides AI and ADAS Momentum, 12 November 2026](https://finance.yahoo.com/markets/stocks/articles/allegro-microsystems-algm-rides-ai-231852090.html)
10. [Allegro MicroSystems quarterly figures from its SEC filings, retrieved 13 November 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000866291)
11. [Allegro MicroSystems, quarterly figures from its SEC filings, retrieved 13 November 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000866291)


---

Allegro MicroSystems launches a single-chip 48-volt power chip it says cuts the parts bill by up to half — The Inference. Canonical: https://theinference.org/article/allegro-microsystems-launches-a-single-chip-48-volt-power-chip-it-says-cuts-the-parts-bill-by-up-to-half