Cirrus Logic, Inc.

What they make

2 inputs Cirrus Logic, Inc. supplies

Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.

Intelligence

What's known

Sourced claims about this company's role in supply chains — chokepoints, concentration, incidents, dual-use connections.

• Did you know2024

  Cirrus Logic's CS35L41 "smart amplifier" — the boosted audio amplifier IC inside every iPhone speaker and most premium Android phones — combines three distinct power electronics and signal processing technologies in a single chip: a switching boost converter (steps up battery voltage from 3.7V to 5-6V to drive the speaker), a Class D switching audio power amplifier (converts audio signal to high-frequency PWM for efficient speaker drive), and a DSP with real-time speaker protection algorithm (monitors temperature, excursion, and RMS power to prevent speaker damage). The switching power converter in Cirrus Logic's phone speaker driver is the same fundamental topology (inductor + switch + diode + capacitor) as: solar panel microinverters (Enphase, SMA), DC-DC converters in data center server power supplies (Vicor, Murata), and industrial motor soft-start controllers. Cirrus Logic engineers with speaker amplifier expertise share the same power electronics textbook knowledge as power supply engineers at Texas Instruments and Vicor — Class D audio amplification and switching converter design are the same domain at different frequency ranges (audio: 20Hz-20kHz, motor drives: 10kHz-100kHz). Cirrus Logic's $1.9B in annual revenue comes primarily from this technology deployed for the "trivial" application of making an iPhone speaker sound louder — the same switching converter topology that runs utility-scale solar inverters.

  Cirrus Logic, Inc. ↗

• Concentration2024

  Cirrus Logic's ~75-80% Apple revenue concentration (fiscal 2023: ~$1.5B of ~$1.9B total from Apple) creates one of the most extreme single-customer concentration profiles among US public semiconductor companies. Apple's known track record of designing out third-party chip suppliers — application processors (Samsung → TSMC/Apple Silicon), cellular modems (Qualcomm → Apple's own design, still ongoing), cellular RF (Broadcom/Skyworks → potentially Apple-designed), and TouchID secure enclave (various → in-house) — creates a permanent strategic overhang: every Cirrus Logic design win in an iPhone product generation could be the last if Apple decides to integrate audio into its SoC or design its own amplifier IC. Cirrus Logic's Austin, Texas engineering team has tried to diversify into HALO digital signal controllers (industrial/power), force sensing, and other areas, but audio remains 90%+ of revenue. Apple's product roadmap decisions made by 5-10 hardware engineers in Cupertino directly determine whether Cirrus Logic remains an independent company or faces the rapid revenue erosion that has happened to every other major Apple component supplier whose product was eventually internalized by Apple Silicon.

  Cirrus Logic, Inc. ↗

• Origin2024

  Cirrus Logic was founded in 1984 in Silicon Valley as a general-purpose mixed-signal IC company. The company nearly failed in 2001-2002 when the collapse of the hard disk drive controller chip market (Cirrus Logic was a dominant HDD read/write channel chip supplier) destroyed most of its revenue in two quarters. Cirrus Logic's survival came from a pivot to audio: Texas Instruments, Analog Devices, and larger semiconductor companies were neglecting the audio IC market as "low value," while Apple and the emerging portable music player market (iPod, launched 2001) created demand for high-quality, low-power audio codecs and amplifiers at cost points that commodity players couldn't meet. Cirrus Logic's CS4202 and later codecs became embedded in the iPod and eventually in iPhones — creating the Apple supply chain lock-in that now represents ~75-80% of Cirrus Logic's ~$1.9B annual revenue. The near-death HDD experience followed by Apple supply chain survival is a classic semiconductor pivot story: a company's competitive core (precision mixed-signal IC design) found an unexpected high-value application at exactly the moment of crisis.

  Cirrus Logic, Inc. ↗