3.2V fixed rail for noise-sensitive loads
The LDK130C32R is a single-output positive LDO from STMicroelectronics' LDK130 family, delivering a fixed 3.2 V at up to 300 mA from a maximum 5.5 V input rail. The 55 dB PSRR across 120 Hz to 10 kHz means it cleans up ripple from a switching pre-regulator before feeding analog or RF stages — the rejection band covers the fundamental and lower harmonics of most DC-DC converters. The 0.4 V maximum dropout at full load sets the headroom requirement: with a 3.6 V input (say from a Li-ion cell near end of discharge), the output stays in regulation down to roughly 3.6 V. The 60 µA quiescent current and 120 µA max supply current keep the self-consumption low enough for always-on peripherals in battery gear.
Industrial temp grade and protection
Rated for -40°C to 125°C operating junction temperature, this LDO fits enclosures that see engine-bay heat or sit next to a hot processor. The over-current and over-temperature protection circuits are built in — no external watchdog needed for fault recovery. The enable pin (active-high logic input) lets a system microcontroller gate the output rail, dropping the load current to near-zero in sleep mode. The SOT-323-5 package (also known as SOT-353) is a 5-lead surface-mount footprint about 2.1 mm × 2.0 mm — small enough for a sensor module or wearable PCB, but the thermal pad is the package itself, so the board copper area under the part sets the effective heat dissipation.
Sourcing and compliance
ROHS3 compliant, so it passes the material restriction requirements for EU and most global markets without an exemption. Available in Tape & Reel or Cut Tape options for volume or prototype quantities. Sourced to order against your BOM line; current pricing and lead time confirmed at quote.