MAX630MJA/883B

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The MAX630MJA/883B DC-DC switching regulator is a positive-voltage variable output regulator for controlling voltage levels for a wide variety of applications. It offers enhanced power efficiency, improved power performance and supports line and load regulation from 1.2V to 5.5V. The MAX630MJA/883B can be used with a variety of voltage sources, such as DC, AC, transformer coupled and charger-use sources for applications such as notebook computer motherboards, telecom systems and networking systems.

Basic Functions of MAX630MJA/883B

The MAX630MJA/883B features robust design, low input/output ripple, line and load regulation and a fast response time. It applies a fixed frequency current-mode control which enables fast transient response and easy external synchronization. The MAX630MJA/883B also features low current levels and high power efficiency, and provides a wide operating temperature range between -40°C and +125°C. The MAX630MJA/883B also supports a range of output voltages from 1.2V to 5.5V. It has low ground noise and is therefore suitable for applications such as notebook computers and servers.

Features of MAX630MJA/883B

• Single input supply for DC/AC/charger type applications.
• Fixed frequency current mode control.
• Variable output voltage from 1.2 to 5.5V.
• Low input ripple and noise.
• High efficiency.
• High power performance.
• Easy external synchronization.
• Low ground noise.
• Wide temperature range (-40°C to +125°C).

Applications of MAX630MJA/883B

The MAX630MJA/883B is a versatile DC-DC switching regulator ideal for applications requiring a wide range of output voltage levels. It is suitable for use with a variety of sources including DC, AC, transformer coupled and charger-type AC-DC supplies. Its low input ripple and noise, high power efficiency and wide operating temperature range make it ideal for applications such as notebooks, laptop computers, server motherboards, telecom equipment and networking system power supplies.

Working Principle of MAX630MJA/883B

The MAX630MJA/883B incorporates a fixed frequency current-mode control for fast transient response and easy external synchronization. It enables the device to maintain an output voltage across a wide range of line, load and temperature conditions. The device has an on-chip 2.2MΩ resistor which is used to detect the voltage at the output. The detected voltage is compared to an error amplifier, and the error voltage drives the output switch. The switch is then pulsed at a given frequency, thus maintaining the output voltage.

The MAX630MJA/883B uses a patented soft-start circuit to eliminate noise and surges in the power supply. It provides fast and precise voltage convergence towards the target output voltage and is independent of input and output voltages. The device also includes a variety of protection features such as adjustable UVLO, current and temperature monitoring, protect circuits for over-temperature, under-voltage, over-voltage and over-current, and transient suppressor circuits to improve system reliability.

Conclusion

The MAX630MJA/883B DC-DC switching regulator is a versatile device suitable for a wide range of voltage control applications. It features robust design, low input/output ripple, line and load regulation and a fast response time. The device has a wide operating temperature range and is suitable for use with several sources. It also provides several protection features for improved system reliability. Thus, it is ideal for applications such as notebooks, laptop computers, servers and telecom equipment.

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