ADP1111ARZ

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The ADP1111ARZ is a highly efficient DC/DC switching regulator integrated circuit created by Analog Devices. The device integrates two low-side fixed-frequency current-mode buck converters onto a single chip. It is suitable for a variety of applications, such as point-of-load (PoL) power systems, voltage regulators in battery-powered systems, and on-board DC to DC converters.

The device contains two buck converter channels and two supply pins. Each buck channel supports up to 9A of continuous output current and a peak current of 10A. It also includes a regulator operating up to 2.6V and a low-dropout linear regulator with a 500 mA peak current and 2.37V minimum input voltage. An internal 10 mV reference voltage can be used to set a maximum voltage for controlling the output voltage. The dual buck converter and low-dropout linear regulator have a wide range of load regulation inputs, which allows for flexibility when selecting input and output voltages.

The ADP1111ARZ also offers a comprehensive range of features to make power system design easy, including input voltage range selection, output voltage guarantee and instantaneous over-temperature protection. It also runs at up to 1.5MHz switching frequency and offers both a synchronous and non-synchronous 600 kHz operation mode. In addition, the device has integrated power control design to reduce output ripple, reduce the EMI signature, and save board space. With the built-in PWM/PFM mode selection, it can provide up to 1.2MHz switching frequency while still maintaining high efficiency.

The device also integrates a 400mA low-dropout linear regulator, which is ideal for providing a low-ripple digital core power supply with minimal components and cost. This low-dropout linear regulator has a minimum output voltage of 0.95V and a maximum output current of 400mA.

The ADP1111ARZ is designed for a variety of applications requiring a high efficiency, flexible DC/DC switching regulator. It is a cost-effective solution for designs requiring a buck or low-dropout linear regulator with a wide range of load regulation inputs. The device is adjustable from one to nine output current limit pins and offers 600 kHz and 1.2MHz switching frequency. It also provides over-temperature protection, as well as a low-dropout linear regulator for digital core power supplies.

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