MAX1818EUT33-T

The MAX1818EUT33-T is a linear voltage regulator from Texas Instruments. It is part of their application-specific voltage regulator family and is designed to provide low-cost integrated solutions for low-voltage handheld electronic devices. The MAX1818EUT33-T is suitable for providing a regulated output voltage up to 5V. It operates with an input voltage ranging from 2.7V to 5.5V.

The MAX1818EUT33-T is ideal for handheld applications such as phones, CD players and palmtop computers, where low voltage and low quiescent current are desirable attributes. Its integrated low-noise linear regulator and switching power supply minimize space and components required. The device also has a low shutdown current of 0.1μA, making it an ideal choice for handheld devices.

When used as a linear voltage regulator, the MAX1818EUT33-T is a four-terminal device. The input voltage is applied between the input terminal and ground, and the output voltage is taken from the output terminal and ground. The output current is determined by the supply voltage and the load connected to the output. The regulation of the output voltage is achieved by controlling the operating voltage across the pass element, which is a series P-channel MOSFET.

The MAX1818EUT33-T uses a voltage feedback system to regulate the output voltage, with a fixed voltage reference of 1.125V. This is applied to the input terminal, and the differential between the output terminal and the reference voltage is monitored as a feedback signal. When the output voltage deviates from the reference voltage, a control signal is generated by the error amplifier and it is then applied to the gate of the P-channel MOSFET, controlling its drain current and regulating the output voltage.

The MAX1818EUT33-T features a wide range of system protection features, including over-current protection, over-temperature shutdown and under-voltage lockout. It is also equipped with short-circuit protection, which automatically shuts down the device when the output is shorted, protecting both the device and the load from damage. The device also has an integrated light-load power save mode that reduces the quiescent current to a minimum when light loads are detected.

In conclusion, the MAX1818EUT33-T is a low-cost and highly integrated linear voltage regulator from Texas Instruments which is ideal for handheld electronic devices. It has a wide range of system protection features and a low shutdown current, making it an ideal choice for applications where low voltage, low quiescent current and high reliability are desired.