Power MOSFETs, SMPS ICs & Op-Amps

This page lists “workhorse” components that appear again and again in successful designs: power MOSFETs for SMPS and motor drivers, switching controllers and regulator ICs, and precision or general-purpose op-amps. Links below can be replaced with your own affiliate URLs for DigiKey, Mouser, Amazon, AliExpress and other distributors.

Note: Always check voltage rating, package, thermal conditions and availability for your project. These parts are suggestions, not a guarantee of suitability.

⚡ Power MOSFETs

IRLZ44N / IRLZ34N

Classic logic-level N-channel MOSFETs for low-voltage, high-current loads and simple power stages. Great for lab PSUs, LED strips, motors and heaters.

55 V · TO-220 · logic-level gate · <0.03 Ω R_DS(on)

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STP55NF06 / STP60NF06

Robust N-channel MOSFETs used in automotive and industrial low-side switching. Good balance of price, availability and ruggedness.

60 V · TO-220 · low R_DS(on) · automotive-friendly

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IPW60R099P6 (Infineon)

Modern high-voltage MOSFET for PFC and primary-side SMPS designs. Excellent efficiency in LLC / flyback / forward topologies.

600 V · TO-247 · CoolMOS · high-efficiency SMPS

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AO3400 / AO3407 (SOT-23)

Small-signal MOSFETs for logic-level switching on PCBs, gate drivers for relays, low-current power rails and battery-powered designs.

30 V / 60 V · SOT-23 · very low gate charge

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🔋 SMPS Controllers & Regulators

UC3842 / UC3843

Classic current-mode PWM controller for offline flyback or forward converters. Perfect for learning and for rugged industrial supplies.

Offline flyback · current-mode · wide support base

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TL494 / KA7500

Versatile PWM controller used in ATX PSUs and many custom SMPS designs. Supports push-pull, half-bridge and forward configurations.

PWM controller · dual error amps · reference on-chip

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LM2596 / LM2675

Simple buck regulators for quick step-down DC-DC designs. Available on countless modules, easy to prototype with.

Buck converter · TO-220 / SOIC · rich ecosystem of modules

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LT3796 / LT3757

Advanced controllers from ADI for LED drivers and high-performance DC-DC. Perfect when you need efficiency and flexibility.

Boost / SEPIC / Flyback · wide VIN · LED capable

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🎛 Precision & General-Purpose Op-Amps

TL072 / TL074

JFET-input op-amps widely used in audio, filters and general analog stages. Easy to source, cheap, and well documented.

Dual / quad · audio-friendly · ±15 V supplies

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NE5532

Classic low-noise dual op-amp for audio preamps, headphone drivers and precise analog conditioning.

Low noise · good drive · DIP / SOIC packages

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OPA2134 / OPAx134

Audiophile-grade op-amps for high-quality analog paths, measurement front-ends and instrumentation.

Low distortion · FET input · ±2.5…18 V

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LM358 / LM324

Workhorse op-amps for DC-level monitoring, comparators, slow control loops and low-cost instrumentation.

Single-supply · rail-to-ground · cheap and everywhere

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