LM5574MTX

LM5574MTX is a Texas Instruments switch‑mode power-supply controller (PWM controller). It provides current‑mode control with a fixed switching frequency, plus built‑in protections such as cycle‑by‑cycle current limit and undervoltage lockout. It is designed to regulate DC‑DC converters (and can be used in flyback, buck, or buck/boost topologies) using an external power MOSFET and the usual feedback path to set the output voltage. The MTX suffix indicates the packaging/tape‑and‑reel option used for manufacturing (packaging variant of the device). Typical applications include wall adapters, notebook/PC power supplies, battery chargers, and other compact offline or DC‑DC regulator designs where a controller plus external pass elements is preferred.

- Pin count: 8 pins (8-pin package, e.g., SOIC-8/TSSOP-8).
- Function: High-voltage, peak-current-mode PWM controller for off-line flyback converters; drives an external MOSFET and regulates output via feedback, with built-in startup, current-sense, oscillator timing, and protection features.

- Manufacturer: Texas Instruments (TI).
- Company type: TI is an American multinational corporation that designs and manufactures semiconductors and integrated circuits (analog, digital, and mixed-signal), and is one of the world’s largest semiconductor companies.

Application areas of LM5574MTX:
- Switch-mode DC-DC converters (buck, boost, buck-boost) for 5–60 V inputs
- Automotive and industrial power supplies and battery-powered equipment
- LED driver circuits (backlight and general illumination)
- Battery charging and power-path management
- Telecom and consumer electronics regulators (compact power-management solutions)

LM5574MTX is supplied in an 8-pin MSOP package (MSOP-8, ~3×3 mm).