MAX828EUK

Voltage - Output (Min/Fixed):	-Vin, 2Vin
Base Part Number:	MAX828
Supplier Device Package:	5-TSOP
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	12kHz
Current - Output:	25mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Negative
Function:	Ratiometric
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

MAX828EUK is a DC-DC switching voltage regulator from MAXIM, which belongs to the PMIC - Voltage Regulators - DC DC Switching Regulators product family. This voltage regulator is designed to convert a supply of input voltage into an adjustable regulated output voltage with high accuracy, low ripple, and robust capabilities.

Features

The MAX828EUK provides a wide variety of features to ensure optimal performance for a variety of applications:

• Wide input voltage range of 2.7V to 18V
• Low quiescent current: 145uA, typical
• Maximum output current: 1.2A
• High efficiency: Up to 95%
• High-side MOSFET current limiting protection
• Temperature range of -40°C to +85°C
• Programmable soft-start

Application Fields and Benefits

The MAX828EUK is suitable for a wide variety of applications, providing the benefits of precise and stable output voltage, high efficiency, and low ripple voltage, making it an ideal choice for battery-operated and low-power applications.Common applications include portable and battery-operated devices, such as LCD displays, radio receivers and transmitters, PDAs, cell phones, bluetooth headsets, and digital cameras. It is also suitable for DC-DC power supplies in desktop PCs and industrial applications, such as robotics and medical applications.

Working Principle

The MAX828EUK is a buck regulator, which means that it converts a higher input voltage into a lower output voltage. The MAX828EUK uses an internal synchronous rectifier, a feedback loop, and an external MOSFET to provide the regulated output voltage.The working principle is as follows: the internal voltage reference is compared to the feedback voltage, and the error signal is used to control the external MOSFET gate. This in turn controls the current through the synchronous rectifier, thereby regulating the output voltage.

Conclusion

The MAX828EUK is a DC-DC switching voltage regulator from MAXIM, designed for low-power and battery-powered applications. It provides precise and stable output voltage, high efficiency, and low ripple voltage, making it an ideal choice for a wide variety of applications. It is capable of working in a wide input voltage range of 2.7V to 18V and can output up to 1.2A of current. Its working principle uses an internal synchronous rectifier, a feedback loop, and an external MOSFET in order to provide the regulated output voltage.

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