Nisshinbo Micro Devices announced the release of the NR1620 series LDO voltage regulator for use in consumer and industrial applications, which provides both industry-leading low quiescent current and low output voltage.
With the expansion of M2M and IoT markets, the improvement of wireless sensor network (WSN) technology is becoming increasingly important. A wireless sensor node, which is indispensable for WSN construction, must have the following characteristics: compact size, low power consumption for long-term battery operation, and high communication speed.
To meet these requirements, it is essential to reduce the voltage of the microcontroller core and various interface power supplies, and the power consumption of individual components mounted on the sensor nodes.
The newly released NR1620 series offers both an ultra-low quiescent current of 0.4 µA and a low output voltage of 0.4 V, both of which are industry-leading characteristics for 150 mA LDO voltage regulators.
This product also has a built-in function that limits a startup current to a certain value to prevent an inrush current at startup. This function suppresses the inrush current and facilitates control when power supply inputs in the subsequent circuit have some limitations.
In addition to these features, this product achieves highly efficient regulation by driving the NMOS power transistors with a bias supply input pin (VBIAS) independent of a power supply input pin (VIN).
The VIN input voltage can range from 0.6 V to VBIAS, and the output voltage is available from 0.4 V to 1.2 V in the 0.1 V step. It is also possible to select with or without the function of discharging a capacitance in the subsequent circuit when the product is turned off with an enable pin.
