MAX603CPA+

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The MAX603CPA from Maxim Integrated is a low dropout, micro-power linear regulator with a low input voltage (1.2V to 15V) and high output current (250mA). The device can be used for many applications such as powering microcontrollers and DSPs, LCD panels, motor control gates, and even for powering SRAMs and memories. The combination of the low dropout voltages and high output current makes it an ideal choice for many applications.

Features of the MAX603CPA

The MAX603CPA features a low dropout voltage of only 0.25V at a 250mA load current, and a maximum output voltage of 15V. It also features an on-chip transconductance amplifier that provides a feedback loop at all output voltages, thus offering excellent line, load, and temperature stability. The device also features a low supply current of only 3.2µA (typical) when disabled. This ensures minimal power consumption during times of inactivity.

Application Field of the MAX603CPA

The MAX603CPA is suitable for a variety of applications ranging from powering microcontrollers and DSPs, to powering LCD panels, motor control gates, and even for powering SRAMs and memories. As such, it is an ideal choice for portable and battery-powered devices such as PDA\'s, notebook computers, and mobile phones. The low dropout voltage and high current capabilities make the MAX603CPA an ideal choice for applications that require high output current and need to be powered from low voltage sources.

Working Principle of the MAX603CPA

The MAX603CPA works on the principle of linear regulation involves the use of a series pass element, such as a transistor, to either raise or lower the output voltage. In the case of the MAX603CPA, a P-Channel MOSFET is used as the series pass element. The P-MOSFET is controlled by a control loop consisting of a PMOS input device, a transconductance amplifier and a resistor divider network to provide an output voltage that is regulated and stable over temperature and process variations.

The input voltage is passed through the P-MOSFET and is then regulated by the control loop. The control loop works by comparing the feedback voltage from the output to a reference voltage. If the voltage on the output is too high, the control loop reduces the gate drive on the P-MOSFET thus decreasing the output voltage. Conversely, if the output voltage is too low, the control loop increases the gate drive on the P-MOSFET and thus increases the output voltage.

With its low dropout voltage of 0.25V at a 250mA load current, the MAX603CPA is able to provide extremely accurate and stable regulation for many applications. The on-chip transconductance amplifier provides excellent temperature and process characteristics, which enables the MAX603CPA to operate smoothly over a wide supply range.

Conclusion

The MAX603CPA+ low dropout linear regulator from Maxim Integrated is an ideal choice for many applications requiring a low input voltage and high output current. The device\'s low dropout voltage and high current capabilities make it an excellent choice for powering microcontrollers and DSPs, as well as for LCD panels, motor control gates, and even for powering SRAMs and memories. The combination of the low dropout voltage and the on-chip transconductance amplifier make the MAX603CPA+ an excellent choice for a wide variety of applications.

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