Nisshinbo Micro Devices Inc. DC DC Switching Controllers R1225N162D-TR-FE

The R1225N162D-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 output voltage adjustable from 1.2 V to 6.0 V in 0.1 V steps. The device features a built-in soft-start function and a latch-type protection circuit to safeguard against overcurrent conditions. This controller includes a PWM/VFM alternative circuit that enhances efficiency at low load currents by automatically switching between PWM and VFM operation modes. The oscillator frequency is selectable among three options: 180 kHz, 300 kHz, and 500 kHz. The typical efficiency is around 90%, and it has a standby current of approximately 0.0 µA, making it suitable for battery-powered and portable devices. The R1225N162D-TR-FE is packaged in a SOT-23-6W format, with a quantity of 3,000 pieces per reel, and is both Pb-free and halogen-free. Applications include hand-held communication equipment, cameras, and household electrical appliances.