MAX77813EWP+T

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MAX77813EWP+T Application Field and Working Principle

MAX77813EWP+T is a DC-DC switching regulator from the PMIC Voltage Regulators family. It works as a regulator for any low output voltage applications. This produced by Maxim Integrated provides a 3-2A wide output range, high input voltage, and a very low quiescent current. The device also integrates a 1A buck-boost converter for adjustable output down to 1.3V.

The MAX77813EWP+T is suitable for applications such as fan controllers, battery charging, and power supplies. As a DC-DC regulator, this integrated circuit can regulate the input voltage to a lower desired output voltage. The main components of the DC-DC regulator are a power transistor, a reference voltage source, and a feedback loop. To indicate the working principle of any DC-DC regulator, a 2-transistor buck-regulator topology must be taken into consideration.

In this topology, one of the two transistors is a step-down converter, while the other is a booster. The step-down converter receives an input voltage higher than the desired output voltage and is connected to the output voltage via the feedback loop. The booster also connected to the output voltage via the feedback loop and amplifies the output voltage. The feedback loop with the aid of the reference voltage source is used to adjust the speed at which the voltage is increased or decreased depending on the requirements of the load.

The MAX77813EWP+T has a low quiescent current. This is beneficial for applications such as configuring a system in a low-power state without consuming too much electricity. This circuit also increases efficiency by reducing the amount of power wasted in various stages of the circuitry. Furthermore, the device includes over-voltage and under-voltage protection to prevent the output voltage from overshooting or undershooting during load transients or when the input voltage drops. The integrated circuit also features short-circuit protection and thermal shutdown.

The MAX77813EWP+T comes in a 7-pin wafer chip-scale package (WCSP). Its overall dimensions are 1.8 mm x 2.5 mm, with a 0.275 mm pin pitch. The device offers a wide input voltage range of 2.7 V to 5.5 V, a maximum output current of 2 A, and a maximum operating temperature of +85°C. In conclusion, the MAX77813EWP+T offers a wide range of features and advantages, and is suitable for any DC-DC regulator application.

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