MAX8538EEI+

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Controller, DDR
Voltage - Input:	4.5 V ~ 23 V
Number of Outputs:	2
Voltage - Output:	0.8 V ~ 3.6 V
Operating Temperature:	0°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	28-SSOP (0.154", 3.90mm Width)
Supplier Device Package:	28-QSOP
Base Part Number:	MAX8538

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Introduction

MAX8538EEI+ is a PMIC (Power Management IC) device specifically designed for special purpose voltage regulation applications. This highly integrated special-purpose regulator combines a wide input voltage range, high efficiency and a low quiescent current with a low 1% precision of adjustable output voltage, and on-board protection features to protect itself and the system from external voltage or temperature-related conditions.

Specifications

The MAX8538EEI+ offers a wide range of features that make it suitable for a variety of voltage regulation applications. It supports input voltages between 4.5V and 7V and can deliver up to 200mA of output current with a maximum dropout voltage of 1.3V while delivering a low quiescent current of 250nA. The flexible voltage control provides an adjustable range of 0.9V to 6.25V and 1% precision over the full range, while the thermal and reverse current protection ensure the output remains properly regulated. The chip also features an accurate enable pin and enable current, built-in soft-start control, and 0.6A pulsed load current.

Application

Due to its high efficiency and low quiescent current, the MAX8538EEI+ is an ideal choice for voltage regulation applications in power management. The adjustable output voltage range and precision make it especially suitable for mobile and wireless device applications, where the input voltage may vary widely and requires a precise control. It can also be used for a wide range of battery-powered systems and stationary applications, such as industrial controllers or lighting systems, as a reliable and low-noise voltage regulator.

Working Principle

The MAX8538EEI+ is composed of a linear voltage regulator, a MOSFET, an enable pin, and a reference voltage generator. When the device is enabled, the voltage regulator circuit will begin to regulate the output voltage according to the signals received from the enable pin. The reference voltage generator provides stable input signals to the error amplifier which compares the actual output voltage to the desired voltage and adjust the gate voltage of the MOSFET accordingly to ensure that the output voltage is kept within the specified range. The MOSFET will pass the required amount of current to the output depending on the load, while the adjustable current limit protects the device from excessive load current.

Conclusion

The MAX8538EEI+ is a high-efficiency, low-quiescent current voltage regulator specifically designed for power management applications. It features a wide input voltage range, high output current and very low dropout voltage, ensuring reliable output regulation in a wide range of input voltages. In addition, the adjustable output voltage range and precision makes it a good choice for mobile and wireless applications. With the built-in safety features, the MAX8538EEI+ can be used to ensure reliable and efficient power delivery to a variety of mobile, battery-powered, and stationary systems.

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