MAX8891EXK19+T Integrated Circuits (ICs)

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This article details the application field and working principle of the MAX8891EXK19+T voltage regulator. It belongs to the PMIC – Voltage Regulators – Linear category.

MAX8891EXK19+T is a high-performance, ultra low-power adjustable linear voltage regulator for advanced portable applications. This voltage regulator uses a basic design principle of reducing power consumption through delivering the exact output voltage dependent on the load and not wasting additional energy. This helps with optimizing battery life in a product design.

MAX8891EXK19+T is designed with an adjustable output side trim voltage control loop. This feedback design allows control and optimisation of required output voltage and current capability. This combination of load regulation, current capability and low quiescent current of MAX8891EXK19+T makes it an ideal voltage regulator for applications such as digital still cameras, personal digital assistants (PDAs) and mobile phones.

The MAX8891EXK19+T voltage regulator is also suitable for providing a wide range of digital and analog core supplies for mobile, imaging and media processor applications such as mobile phones, digital Still cameras and PDAs, which require a low quiescent current, flexible output voltage and low dropout capability. The regulator is designed to keep power consumption as low as possible while still providing the required current to the device.

The MAX8891EXK19+T regulator uses an inductorless DC-DC converter, with the voltage being regulated by a trimming feedback loop. It uses a reference voltage supplied by an external voltage reference to maintain a constant output voltage. This voltage reference is supplied by an external reference voltage, or it can be derived from the input voltage itself. Voltage regulation is obtained with dynamic loop control, providing fast response to transient load conditions.

The MAX8891EXK19+T regulator has a maximum output current of a thousand-milliamp (1A) and a minimum output voltage of 1.25V. It has an input voltage from 3V to 5.6V and an output voltage range from 0.8V to the maximum output voltage . The quiescent current is typically only 25µA, and extremely low when in shutdown mode. The current limit is always set externally and will automatically limit the output current.

The MAX8891EXK19+T voltage regulator can be housed in a tiny package and offers great performance, making it ideal for a range of applications which require fast response, great performance and extremely low quiescent current. Due to its high power efficiency and small size, it’s suitable for portable and low-power applications. The combination of its low power consumption, adjustable output voltage and efficient switching makes MAX8891EXK19+T voltage regulator an ideal choice for portable system designers.

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