One of the smallest four-channel power management ICs (PMICs), the NJW4750 is now available from Rutronik UK. It is offered in a 3.4mm x 2.6mm EQFN26 package which incorporates three buck regulators and an LDO for voltage regulation. The distributor also offers the matching evaluation board.
One channel is directly connected to the supply voltage of 40V (max) and serves as the primary controller for the secondary synchronous buck regulators and the LDO. One of the two secondary regulators can be switched to LDO mode.
Each controller has its own power-good pin and enables input, to control the output voltage during system power-on phase. The NJW4750 is controlled either via the external sync input or via an internal oscillator, with a range of 280kHz to 2.4MHz. This design allows the use of compact coils, further contributing to space savings.
Operating over a temperature range of -40°C to 125°C, the PMIC can be used for generating a 3.3V power supply at maximum 40V input voltage and derived voltages of 2.8V (LDO), 1.8V (channel 2) and 1.2V (channel 3).
Applications include industrial controls, camera systems, IoT boards, photoelectric sensors, single-board controllers and especially compact peripherals and sensors.
