MAX1963AEZT250+

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MAX1963AEZT250+ application field and working principle

The MAX1963AEZT250+ is a member of the MAX1xxxEZ family of low dropout (LDO) linear voltage regulators from Maxim Integrated that offer a wide operational temperature range and high accuracy regulator performance.

Operating over a wide input voltage range (1.8V to 5.5V) and delivering up to 250mA of continuous output current, the MAX1963AEZT250+ is ideal for powering low-noise analog and digital circuits in a range of applications.

The MAX1963AEZT250+ is designed to offer excellent line and load regulation, low quiescent current, fast transient response, and good output noise and ripple rejection over a wide range of operating conditions. It features an adjustable voltage output, with a 2.85V to 6.4V typical range, as well as undervoltage, overvoltage, and thermal protection.

Application field

The MAX1963AEZT250+ is suitable for a wide range of portable applications, including cell phones, PDAs, portable media players, digital still cameras, and other portable devices that require a reliable, low noise power supply. It meets the needs of operating temperature (-40°C to +85°C) and power requirements for a variety of process nodes, including 12V nodes.

The high output voltage accuracy, low dropout voltage, as well as low ripple and fast transient response of the MAX1963AEZT250+ make it an ideal power source for powering sensitive analog and digital circuits such as audio amplifiers and ADCs.

Working principle

The MAX1963AEZT250+ operates on the principle of linear voltage regulation, which involves controlling the output of the regulator based on the difference between the input and output voltages. The regulation is achieved by driving a pass transistor in series with the output voltage. The amount of current passing through the pass transistor is proportional to the difference (ΔV) between the input and output voltages (ΔV = V_IN - V_OUT).

The series pass transistor in the MAX1963AEZT250+ is controlled using a feedback loop circuit, which monitors the output voltage and adjusts the pass transistor current accordingly to maintain the desired output voltage. The MAX1963AEZT250+ is designed to keep the output voltage within ±1% of its nominal value over the entire input voltage range and temperature range.

In addition to its linear voltage regulation, the MAX1963AEZT250+ also offers protection circuitry to help ensure safe operation in the presence of input undervoltage, overvoltage and thermal overload conditions.

Conclusion

The MAX1963AEZT250+ is an ideal regulator for variety of applications which require a low dropout voltage and fast transient response. It is designed to offer an excellent line and load regulation, low quiescent current, good noise and ripple rejection, and protection against input undervoltage, overvoltage and thermal overload conditions.

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