MAX8840ELT45+T

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Efficient power management and voltage regulation is an integral component in today\'s electronic designs, and a key component in this power management is the voltage regulator. The MAX8840ELT45+T linear voltage regulator, manufactured by Maxim Integrated, is a low-power, small form factor voltage regulator that operates across a wide temperature range. This device offers excellent load and line regulation, accurate operation, and very low output noise. The MAX8840ELT45+T is suitable for desktop computers, industrial equipment, and embedded systems and is a versatile component in any power management system.

Description

The MAX8840ELT45+T is a low-noise, low-power linear regulator that operates across a wide temperature range, so it is suitable for use in many applications. This voltage regulator features an on-chip temperature-compensated bandgap reference, which allows for accurate control of the output voltage even when the input voltage varies across the operating temperature range. This feature also helps provide excellent line regulation (the ability to maintain a steady output voltage even when the input voltage changes), and an excellent load regulation (the ability to maintain a steady output voltage even when the load current changes).

The MAX8840ELT45+T includes an enable/disable control pin that allows the user to shut down the device while not in use, enabling additional system power savings. In addition, the device also features current limit and output voltage foldback capability, which helps protect the device from overloads and shorts. The MAX8840ELT45+T is rated for operation over a wide input voltage range (1.8V to 5.5V) and is designed for output voltage ranges of 1V to 4.5V.

Features

• Excellent line and load regulation
• Ultra low noise performance (3.5uVrms)
• High efficiency (90%)
• Low quiescent current (100uA)
• Wide operating temperature range (– 40°C to + 125°C)
• Surface mount package (SOT23-5)
• Enable/disable control pin
• Current limit and output voltage foldback

Applications

The MAX8840ELT45+T is a low-power, small form factor voltage regulator that operates across a wide temperature range, making it an ideal choice for many applications. It is suitable for applications such as embedded system power management, cellular phones, PDAs, digital cameras, automotive power systems, point-of-load regulation, and other low-power systems. This device is well-suited for powering devices from lithium-ion and nickel-metal-hydride (NiMH) batteries, and can also be used to provide compliance voltage for linear ICs, such as ADCs and DACs. The MAX8840ELT45+T is designed for output voltage ranges of 1V to 4.5V.

Working Principle

As with any linear voltage regulator, the MAX8840ELT45+T works by regulating the output voltage based on the output of an on-chip temperature-compensated bandgap reference. This reference voltage is compared to the input voltage, and current is then drawn from the input to maintain a constant output voltage. The output voltage is regulated even when the input voltage changes across the operating temperature range. This provides excellent line regulation and an excellent load regulation.

The MAX8840ELT45+T also includes an enable/disable control pin, which allows the user to shut down the device while not in use, enabling additional system power savings. Additionally, it includes current limit and output voltage foldback capability, which helps protect the device from overloads and shorts. The MAX8840ELT45+T is rated for operation over a wide input voltage range (1.8V to 5.5V) and is designed for output voltage ranges of 1V to 4.5V.

Conclusion

The MAX8840ELT45+T voltage regulator is an efficient, low-power linear regulator for providing precision output voltages even when subject to variations in input voltage or temperature. Its features such as current limit and output voltage foldback provide additional protection from overloads and shorts. Its wide range of application fields and excellent performance characteristics make it an ideal choice for a variety of electronic systems.

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