Ultra-low quiescent current LDO for always-on and battery-powered rails
The TLV70433DBVRM3 from Texas Instruments is a 150-mA, 24-V ultra-low-IQ low-dropout voltage regulator designed for applications where keeping the supply current to a minimum is critical — think battery-powered IoT nodes, always-on sensor rails, or microcontroller standby supplies. Its low dropout characteristic means it can regulate a fixed output from a supply that sags close to that level, which improves efficiency in battery-operated gear.
What the ratings mean for your BOM
The headline rating here is the combination of 150-mA output capability and a 24-V maximum input voltage with ultra-low quiescent current. For a BOM engineer, that means this regulator can power a low-power MCU or wireless module directly from a 24-V industrial bus or a multi-cell Li-ion stack while drawing negligible current from the battery when the load is in sleep mode. The low dropout ensures the output stays in regulation even as the battery discharges close to the set point, extending usable run time. The fixed output voltage eliminates the need for external resistor dividers, saving board space and reducing BOM count.
Lifecycle and sourcing posture
The TLV70433DBVRM3 carries an active lifecycle status with ROHS3 compliance. There is no NRND or EOL flag on this part, so it remains a valid selection for production builds and new designs. For procurement, this means no last-time-buy scramble or date-code risk from discontinuation.
Package and assembly fit
The package is a SOT-23-5, a small footprint that fits densely populated PCBs typical of portable or industrial control modules. No special handling beyond standard SMT reflow is required.