The MAX1858AEEG+T is an integrated circuit (IC) component manufactured by Maxim Integrated. It is a high-efficiency, low-quiescent-current, step-up DC-DC converter. This device is designed to provide a regulated power supply for various applications, particularly portable electronic devices.
One of the key features of the MAX1858AEEG+T is its ability to operate with an input voltage as low as 0.7V, which makes it suitable for single-cell applications. It can step up this low voltage to a higher output voltage, which can be programmed using external resistors. The converter can deliver a maximum output current of 25mA.
The IC uses a simple external inductor and capacitor to form a boost converter. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage and maintain high efficiency. The device offers two modes of operation: forced-PWM mode and pulse-skipping mode. The mode selection is done by a single external resistor, making it easy to configure.
The MAX1858AEEG+T also includes features like soft-start to limit inrush current during startup, overcurrent protection to safeguard the device and the load in case of a fault, and thermal shutdown to prevent damage from excessive heat. These built-in protection features enhance the reliability and safety of the device
