MAX734ESA+

PMIC - Voltage Regulators - Special Purpose

The MAX734ESA+ is a special purpose voltage regulator from Maxim Integrated.

Application Field

The MAX734ESA+ is mainly used for portable battery-powered applications. Its main feature is low-dropout operation, which results in lower power loss. It can provide up to 800 mA of output current, making it well-suited for applications that require low output voltage regulation and noise reduction. The device also has reverse-blocking capabilities, which means the input voltage cannot exceed the output voltage even for intermediate load conditions.

Working Principle

The MAX734ESA+ works by controlling the voltage drop (VDO) across a series-pass transistor when operated in drop-out mode. Since the output voltage is regulated through the VDO, current demand directly influences VDO and the voltage regulation of the device is independent of output current. This ensures the VDO remains constant even at high outputs by preventing drastic variations in the output voltage.

The device also features a built-in low input voltage detect circuit. This circuit senses the incoming voltage and automatically shuts down the device when a preset lower threshold is reached. This prevents undesirable operation at low input voltages and reduces power consumption.

The MAX734ESA+ also contains an ESD protection circuit, which safeguards against transients caused by electrostatic discharge. This ensures the device remains reliable even under hostile electrical conditions.