MAX840ISA+

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Charge Pump, Cellular Telephone Transmitter
Voltage - Input:	2.5 V ~ 10 V
Number of Outputs:	1
Voltage - Output:	-2V, -0.5 V ~ -9.4 V
Operating Temperature:	-25°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	MAX840

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Introduction to MAX840ISA+

The MAX840ISA+ is a special purpose voltage regulator from the PMIC–Voltage Regulators family. It is a low-cost, 2.85V to 5.5V power supply designed to provide a low-current source to CMOS components in automotive, telecommunications and instrumentation equipment.

Features of MAX840ISA+

The MAX840ISA+ offers a range of features, including a wide input voltage range, current limiting, thermal limiting, over-temperature protection, shutdown port, logic-controlled shutdown, and an enable/disable mode. It is designed to provide a regulated output voltage of 2.85V to 5.5V, and can provide up to 800 mA of output current at adjustable voltage levels.The MAX840ISA+ has a wide temperature range, and can operate up to 105 °C. It features low-power dissipation, and can reduce power dissipation by up to 70%. It is also designed with short-circuit protection, and is UL approved.

Application Fields & Working Principle

The MAX840ISA+ is used in many applications, including automotive, Telecommunications and industrial/instrumentation equipment. It is also suitable for use as a voltage regulator in battery-powered devices, as a current limiter in high-impedance supply lines, and as a battery-backed supply.The MAX840ISA+ operates on the principle of controlling the voltage on an output voltage monitoring pin to maintain a constant level. This is achieved by the use of a metal-oxide-semiconductor (MOSFET) transistor, which controls the conduction of electrons through the internal circuitry to regulate the output voltage. The device is designed using a feedback loop, which controls the gate terminal of the MOSFET, thus maintaining the desired voltage level.The MAX840ISA+ has a maximum output current of 800 mA and a maximum input voltage of 6V. It includes a 1.2V output voltage monitoring pin and a power-on reset (POR) feature which allows the device to enter a low-power shutdown mode if the input voltage is low.The MAX840ISA+ is designed to provide a low-current source to CMOS elements, reducing the current load on the power supply and improving efficiency. It is also designed to reduce power dissipation, and can maintain stability under extreme temperature and load conditions, allowing for reliable operation.

Conclusion

The MAX840ISA+ is a powerful and cost-effective voltage regulator from PMIC–Voltage Regulators family, suitable for a variety of applications and environments. It is designed to provide a stable low-current source to CMOS elements and offers many features, including wide input voltage range, current and thermal limiting, over-temperature protection, and logic-controlled shutdown. With its low power dissipation and wide operating temperature range, the MAX840ISA+ is an ideal choice for a reliable and efficient voltage regulator.

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