Nisshinbo Micro Devices Inc. DC DC Switching Controllers R1225N122B-TR-FE

The R1225N122B-TR-FE is a CMOS-based PWM step-down DC/DC converter controller designed for high efficiency and low supply current applications. It operates within a wide input voltage range of 2.3 V to 18.5 V and offers an adjustable output voltage from 1.2 V to 6.0 V in 0.1 V steps. The device features a built-in soft-start function, latch-type protection circuit, and a PWM/VFM alternative circuit that enhances efficiency at low load currents. The oscillator frequency is selectable among three options: 180 kHz, 300 kHz, and 500 kHz. The typical efficiency is around 90%, with a standby current of approximately 0.0 µA and a high output voltage accuracy of ±2.0%. This product is suitable for applications in hand-held communication devices, battery-powered equipment, and household appliances.