Nisshinbo Micro Devices Inc. Voltage Regulators - DC DC Switching Regulators RP504K291D-E2

The RP504K291D-E2 is a step-down DC/DC converter designed for efficient voltage regulation with a maximum output current of 600 mA. It operates within an input voltage range of 2.3 V to 5.5 V and provides fixed output voltages from 0.8 V to 3.3 V in 0.1 V increments, with an output voltage accuracy of ±1.5% or ±18 mV depending on the output voltage level. The device features a low supply current of approximately 25 µA in VFM mode without load and a standby current of up to 5 µA. This converter employs synchronous rectification to enhance efficiency by using built-in switching transistors instead of diodes, which also helps reduce the overall parts count in designs. The RP504K291D-E2 supports two power control methods: forced PWM control and PWM/VFM auto switching control, selectable via the MODE pin. Protection features include overcurrent protection and a latch-type protection circuit to safeguard against prolonged overcurrent conditions. The device is available in compact package options, including DFN(PLP)1216-6F, DFN1616-6B, and SOT-23-5, making it suitable for applications where board space is limited. It is ideal for powering battery-operated devices and portable electronics.