2A, 4 MHz — the switching regulator for tight board space
The MIC23150-4YMT-TR is a 2A step-down buck converter from Microchip's HyperLight Load® series, switching at 4 MHz. That switching frequency lets you use a 1 µH or smaller inductor and 10 µF output caps — the whole power stage fits in about 25 mm² of board area. The 2.7V to 5.5V input range covers single-cell Li-ion (3.0-4.2V) and fixed 3.3V or 5V rails, making it a drop-in for portable gear, IoT nodes, and peripheral power. It's a synchronous buck with a fixed 1.2V output — no external feedback divider needed. The internal FETs and synchronous rectifier keep efficiency above 85% across most of the load range, which matters when you're running from a battery and every milliwatt counts. The -40°C to +125°C junction temperature rating means it handles industrial ambient without derating, and the 8-TDFN (2x2 mm) package is small enough to fit under a shield can.
Active production — volume sourcing is straightforward
Lifecycle status is Active per Microchip's latest records, so this part is still being manufactured and is available through authorized distribution. No NRND or EOL notice on file. It is ROHS3 compliant (no exemptions), which keeps it clean for global shipments including EU and California markets. Sourced and quoted to order against RFQ — lead time and pricing confirmed at quote time, not from a static shelf count.