AN77L04M-E1

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Analog Devices Inc.’s AN77L04M-E1 is a low-dropout (LDO) regulator IC, meaning it is specifically tailored to regulating the output of a power supply. This type of integrated circuit is habitually used to power electronic devices, with the purpose of providing a stable voltage level over the complete range of input voltage and load conditions. With its wide input voltage range spanning from 2.3V to 36V and its low output voltage ripple of 1 mV at light loads, the AN77L04M-E1 is an excellent choice for applications that must have a well-regulated, linearly adjusted output voltage.

The low-dropout voltage of the AN77L04M-E1 is its most striking feature – at only 100mV, it is incredibly efficient at regulating its output voltage. Its ability to maintain a stable output voltage is further enhanced by its advanced on-chip features such as its wide input voltage range, low voltage dropout and tight line regulation (which ensures minimal variation in the output voltage from no-load to full-load conditions). In addition, its 2A maximum output current rating allows it to power a wide range of high-power applications, including those requiring charges or discharges above or below the regulated output voltage.

The AN77L04M-E1 is a three-terminal regulator IC, consisting of an output voltage terminal (OUT), an input voltage terminal (IN), and a ground terminal (GND). It contains a common MOSFET switch to provide precise regulation of its output voltage. This is achieved by comparing the output voltage (Vadc) measured at the output terminal to an on-chip reference voltage (Vref), which is determined by an external resistor (R1). If the output voltage is greater than the reference voltage, the MOSFET switch is off, allowing current to pass through the output terminal. Conversely, if the output voltage is lower than the reference voltage, the MOSFET switch is on, diverting current away from the output terminal and into the ground terminal. By adjusting the external resistor (R1) to alter the reference voltage, the output voltage can be accurately regulated over a wide range of input and output voltages.

The AN77L04M-E1 is ideal for applications requiring the precise regulation of an output voltage over a wide range of input and output voltages, such as power supplies, battery-powered devices, on-board voltage regulation in systems, power management in portable consumer products, and distributed power systems. Its low drop-off voltage of 100mV, wide input voltage range of 2.3V to 36V, low output voltage ripple of 1mV, tight line regulation and 2A maximum output current rating makes it an ideal choice for applications requiring a stable output voltage.

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