1.8V fixed rail, 150mA, 4-X2SON package
The TLV71318PDQNT is a fixed-output linear regulator from Texas Instruments, delivering 1.8V at up to 150mA from a 2.5V to 5.5V input rail. The 4-X2SON (1x1 mm) package with exposed pad suits space-constrained designs where a clean analog or digital supply is needed close to the load.
PSRR across the switching band
PSRR is specified at 70 dB at 100 Hz, rolling off to 55 dB at 1 MHz. This means the regulator attenuates upstream switching noise from a 1 MHz DC-DC converter by about 55 dB — enough to keep ripple below 1 mV for most sensor and RF front-end rails, provided the input decoupling is adequate.
Protection and operating range
On-chip protection includes over-current, over-temperature, reverse polarity, short-circuit, and under-voltage lockout (UVLO). The enable pin allows external on/off control without a separate power switch. Output configuration is positive, fixed at 1.8V.