Fixed 3.2 V LDO in SOT-23-5
The STMicroelectronics LDK220M32R is a single-output positive linear regulator delivering a fixed 3.2 V at up to 200 mA from a maximum input of 13.2 V. Maximum dropout is 0.35 V at full load, so the input rail needs to stay above 3.55 V to keep the output in regulation under load.
PSRR and noise rejection across frequency
Power supply rejection ratio is 55 dB at 120 Hz, rolling to 50 dB at 10 kHz — the regulator attenuates 120 Hz ripple from a rectified mains supply by a factor of ~560, and still knocks down switching noise in the low kilohertz range by over 300×.
Protection and control features
Operating temperature range spans -40°C to 125°C, covering industrial and automotive ambient conditions.
RoHS3 compliant (2011/65/EU + 2015/863), with no exemptions flagged.