MAX1904EAI+

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Controller, Notebook Power System
Voltage - Input:	4.2 V ~ 30 V
Number of Outputs:	2
Voltage - Output:	2.5 V ~ 5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	28-SSOP (0.209", 5.30mm Width)
Supplier Device Package:	28-SSOP
Base Part Number:	MAX1904

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PMIC - Voltage Regulators - Special Purpose - MAX1904EAI+ Application Field and Working Principle

The MAX1904EAI+ is a specialized type of voltage regulator used within many power management systems (PMICs). Designed to provide comprehensive power management, it is suitable for applications such as cellular phones, telecommunication systems, and personal digital assistants. The MAX1904EAI+ is a fast-switching, low-noise, low-dropout voltage regulator with a built-in charge pump.

Overview

The MAX1904EAI+ is a high-performance voltage regulator designed for use within a wide range of power management systems. Its main application fields include cellular phones, industrial systems, and personal digital assistants. Its main features include a wide operating-input voltage range of 1.4V to 5.5V, and a low dropout voltage of 110mV@500mA. The device is available in both a 4-pin SOT-23 package and a 5-pin SOT-23 package.

Block Diagram

The block diagram of the MAX1904EAI+ reveals its main components. The main controller is the regulating circuit, which receives power from the system power supply. The power switch is a fast current-limiter MOSFET switch that controls the motor current on and off. Also, the charge pump is a programmable charge pump that controls the input voltage to the output voltage. The various components are connected in a closed loop, allowing the regulator to supply a precise output voltage.

Input Voltage Range

The MAX1904EAI+ is designed to operate over a wide input voltage range, from 1.4V to 5.5V. This allows the device to provide suitable output voltage levels for both low-voltage and high-voltage applications. The device also features programmable input-voltage protection, which protects against over-voltage and under-voltage conditions, ensuring that the input voltage is within an acceptable range.

Output Voltage Range

The MAX1904EAI+ provides an adjustable output voltage range of 0.6V to 5.5V. This allows the user to select the output voltage level suitable for the application. The output voltage can be easily adjusted using a two-wire digital interface. The adjustable output voltage is further protected against over-voltage and under-voltage conditions using a programmable output-voltage protection feature, which prevents the output voltage from exceeding or falling below the set limits.

Operating Frequency Range

The MAX1904EAI+ features programmable operating frequency, which allows the user to select the most suitable frequency for the application. The frequency range is from 200kHz to 1MHz, allowing the user to select the most suitable frequency for the application. This programmable frequency range allows the device to provide excellent dynamic response, ensuring stable output voltage even under changing load conditions.

Charge Pump

The MAX1904EAI+ features a built-in charge pump, which provides the necessary current to power the device\'s output. The charge pump is programmable, which allows the user to set the desired output voltage level. Additionally, the charge pump also reduces the input voltage losses, thus providing more efficient device operation.

Protection Features

The MAX1904EAI+ offers various protection features, which ensure safe device operation. These features include a current-limit protection, voltage-overshoot protection, over-temperature protection, and over-voltage protection. Additionally, the device also features an adjustable soft-start feature, allowing the user to adjust the device\'s start-up time and ensuring that the current drawn from the power supply is kept within safe limits.

Conclusion

The MAX1904EAI+ is a high-performance voltage regulator designed for use in a wide range of power management systems. Its wide input voltage range and adjustable output voltage level, along with its fast current-limiting and charge-pumping functions, make it suitable for a wide range of applications. Additionally, the device offers various protection features, ensuring safe device operation.

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