Fixed 1.2V rail for core and RF supplies
The TPS79912YZUR is a single-output LDO from Texas Instruments, delivering a fixed 1.2V at up to 200mA. That fixed voltage targets the core rail of many low-power MCUs and RF SoCs, where a clean, regulated 1.2V supply is non-negotiable for stable operation. With a maximum dropout of 180mV at full load, the input rail needs to stay above 1.38V to keep the output in regulation — a 1.5V or 1.8V intermediate bus works cleanly.
70 dB PSRR — where it matters
PSRR is 70dB at 100Hz, rolling off to 38dB at 100kHz. The 70dB at line frequency means the LDO attenuates 50/60 Hz ripple from a rectified supply by a factor of ~3000 — critical for sensitive analog front-ends or RF transceivers sharing the same supply rail. The 38dB at 100kHz means switching-regulator noise above that frequency passes through more readily; a post-filter or a second LDO stage is the typical fix for noise-sensitive blocks.
5-DSBGA package and board integration
The 5-DSBGA (0.8mm pitch, 5-ball array) package is a wafer-level chip-scale package — no plastic overmold, the die sits directly on the board. The footprint is 0.9mm × 1.2mm, saving real estate on dense mixed-signal boards. The Enable pin lets the system power down the LDO when the load is idle, dropping quiescent current from 60µA to near zero.
Protection suite for industrial environments
Built-in protection covers Over Current, Over Temperature, Reverse Polarity, and Under Voltage Lockout (UVLO). The UVLO prevents the output from turning on until the input rail is high enough to maintain regulation — no brownout glitches on the core rail during power-up sequencing.