ADP1111ARZ-5-REEL

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The ADP1111ARZ-5-REEL is a high-efficiency, low-noise dc-dc switching regulator that comes in a small 5-pin SOT-23 package. It is ideal for applications in battery-powered systems, power-line regulation, and other low-power applications. This device can provide up to 1.5 A of output current. It is designed to support an input voltage from 3 V to 20 V and an output voltage from 1.2 V to 12 V.

The ADP1111ARZ-5-REEL uses a synchronous rectification technique to provide high conversion efficiency, up to 96%. The operating frequency is programmable with the use of external resistors, enabling flexibility in design. It also features a low-noise operation, a fixed output ripple voltage of 12 mV, and includes a dynamic load capability. The device also includes an integrated shutdown mode, allowing the device to be disabled, reducing quiescent current draw.

The ADP1111ARZ-5-REEL belongs to the PMIC (Power Management ICs) family of voltage regulators and DC-DC switching regulators. It is an ideal device for battery-operated systems, alternative sources of power, or any low-power system that requires an efficient and low-noise voltage regulation solution. The part is available in a RoHS-compliant MoStrak-5 (5-pin SOT-23) package.

Working Principle

The ADP1111ARZ-5-REEL is a high performance, synchronous step-down dc-to-dc switching regulator. It works by controlling an external N-channel MOSFET switch. When operating, the internal Comp control block monitors the output voltage using an error amplifier and adjusts the duty cycle of the MOSFET switch to keep the desired voltage level.

The ADP1111ARZ-5-REEL also includes two other components: a phase locked loop (PLL) and an internal oscillator. The PLL compares the ramp voltage of the oscillator to the reference voltage, determines the duty cycle of the MOSFET switch, and sends the signal to the control logic. When the duty cycle is adjusted, the output voltage changes, thus regulating the voltage output.

The ADP1111ARZ-5-REEL also includes advanced short-circuit protection and over-temperature protection. The short-circuit protection circuitry monitors the output current and limits it to a preset level. If the output current exceeds the limit, the PWM switching will be stopped and the output voltage will be reset to its original regulation point. The over-temperature protection circuitry will shut down the switching converter when the temperature exceeds the programmed thermal limit.

Conclusion

The ADP1111ARZ-5-REEL is an efficient and low-noise dc-to-dc switching regulator. It is suitable for a variety of applications such as battery-operated systems, alternative sources of power, and other low-power systems where an efficient and low-noise voltage regulation solution is desired. The device includes several protection features, an adjustable operating frequency, and an integrated shutdown mode. The belongs to the PMIC family of voltage regulators and DC-DC switching regulators.

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