Linear & low-dropout (LDO) Regulators

The UMW 78L05 is a fixed 5V monolithic linear voltage regulator from UMW’s 78L series, designed to deliver a stable, regulated 5V output at up to 100mA from input voltages up to 30V — making it ideal for powering low-current logic circuits, reference voltage rails, sensors, and signal conditioning stages in both consumer and industrial electronics. With a quiescent current (I_q) of 2mA and a fixed V_Output of 5V, the UMW 78L05 requires only small input and output bypass capacitors for stable operation, minimising BOM complexity in space-constrained designs. The device is housed in a compact SOT-89-3 package with a pinout compatible with the industry-standard 78L05 family used across multiple manufacturers. ABL Semi supplies the UMW 78L05 as a 100% authentic factory product with flexible MOQ and direct pin-to-pin compatibility to the TI UA78L05, onsemi MC78L05, and ST L78L05 series.

The UMW AMS1117 is a positive low-dropout (LDO) linear voltage regulator delivering up to 1A continuous output current with a typical dropout voltage of just 1.2V at 1A, making it one of the most widely deployed LDO regulators in consumer electronics, embedded systems, and industrial power supply designs. Available in both fixed output voltage versions (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V) and an adjustable (ADJ) version, the UMW AMS1117 provides output accuracy of 2% on fixed versions and 1.5% on the adjustable version — ensuring precise, stable regulation across load and temperature variations. UMW manufactures the AMS1117 in SOT-223, TO-252, and SOT-89 packages for broad PCB layout compatibility. ABL Semi supplies the UMW AMS1117 as a 100% authentic product with flexible MOQ, serving as a pin-to-pin replacement for AMS1117 devices from Advanced Analogic, Diodes Inc., and other established brands.