Rutronik UK now stocks the NJW4750 from NJR, one of the smallest four-channel power management ICs on the market. The space-saving 3.4mm x 2.6mm EQFN26 package includes three buck regulators and an LDO for precise voltage regulation. Both the device and the matching evaluation board are available at Rutronik UK.
Channel 1 of the PMIC is directly connected to the supply voltage of max 40V and functions as the primary controller for the secondary synchronous buck regulators and the LDO. To improve the flexibility of circuit design, one of the two secondary regulators can be changed to LDO mode. Each controller has its own power-good pin and enable input, providing for precise control of the output voltage throughout system power-on phase. The device is controlled either through the external sync input or an internal oscillator, which covers a frequency range from 280kHz to 2.4MHz, allowing the usage of compact coils.
In a temperature range of -40C to 125C, the device is ideal for example for generating a 3.3V power supply at max 40V input voltage and derived voltages of 2.8V (LDO), 1.8V (channel 2) and 1.2V (channel 3).
Applications of the Power Management IC include industrial controls, camera systems, photoelectric sensors, IoT boards, single-board controllers and particularly compact peripherals and sensors.