Powering from a single or dual battery cell supply, PREMA Semiconductor’s PR4404 SSLD dispenses up to 150 mA of LED current at 1.2 or 1.5 V (single) and up to 300 mA LED current at 2.4 V or 3 V (dual). A hold input allows brightness control via a PWM signal or MCU with switching frequencies from 300 kHz to 700 kHz. The driver demonstrates a minimum startup voltage of 1 V, ESD protection of 2 kV, a peak output current of 1.5 A, and thermal resistance of 160 K/W. The step-up converter has an operating temperature range from -20°C to 125°C and a storage temperature range from -55°C to 150°C. The SSLD performs in 0.5 W and 1 W white power LEDs in LED torches, LCD panel backlighting, home lighting, and toys.