**Ultra-Low Quiescent Current 200mA Linear Regulator ADP190ACBZ-R7 for Power-Sensitive Applications**

In the rapidly evolving landscape of portable and battery-powered electronics, power efficiency is paramount. Devices such as wearables, medical implants, IoT sensors, and always-on monitoring systems demand components that minimize energy consumption to extend battery life without compromising performance. The **ADP190ACBZ-R7**, a 200mA linear regulator from Analog Devices, stands out as a critical solution tailored for these ultra-power-sensitive applications.

At the heart of the ADP190ACBZ-R7’s appeal is its **ultra-low quiescent current (IQ) of just 800nA** at light loads. Quiescent current, the current drawn by the regulator itself when it is active but not supplying significant load current, is a dominant factor in power loss during standby or sleep modes. Traditional linear regulators often exhibit quiescent currents in the range of tens or even hundreds of microamps, which can rapidly deplete small battery cells. The ADP190’s nanoamp-level IQ **dramatically reduces the system’s idle power consumption**, enabling products to achieve months or even years of operation on a single battery.

Beyond its remarkable IQ, the ADP190ACBZ-R7 provides a stable and clean output voltage, adjustable from 1.2V to 3.3V, making it versatile for powering a wide array of low-voltage microcontrollers, sensors, and memory. It features a low dropout voltage (LDO) of typically 180mV at 200mA, allowing it to maintain regulation even when the input voltage is only slightly higher than the output. This is crucial for maximizing battery usage, as it permits operation down to a very low end-of-discharge voltage.

The device is designed for robustness and simplicity. Housed in a compact, 4-bump WLCSP (Wafer Level Chip Scale Package), it is ideal for space-constrained PCB designs. It incorporates key protection features such as **current limit and thermal shutdown**, safeguarding both the regulator and the downstream circuitry under fault conditions. Its stability is achieved with just a small 1µF ceramic output capacitor, simplifying the bill of materials and reducing overall board space.

For engineers designing the next generation of power-efficient devices, the ADP190ACBZ-R7 represents a superior choice. It directly addresses the core challenge of extending battery life in applications where every nanoamp counts, without sacrificing output accuracy, stability, or integration simplicity.

**ICGOOODFIND:** The ADP190ACBZ-R7 is an exceptional ultra-low IQ linear regulator that sets a new benchmark for power preservation in battery-sensitive applications, enabling significantly extended operational lifetime.

**Keywords:** Ultra-Low Quiescent Current, Linear Regulator, Power-Sensitive Applications, Battery Life Extension, Low Dropout Voltage (LDO)