Maxim Integrated Voltage Regulator 471 mW 10V SOIC 8-Pin MAX840ISA+

Maxim Integrated MAX840ISA+ is a high-performance voltage regulator designed for reliable power management in electronic systems. This negative polarity device features a maximum power rating of 471 mW and operates with an input voltage range from 2.5V to 10V, making it ideal for modern applications requiring flexible voltage regulation. The regulator comes in a compact Surface Mount SOIC 8-pin package, ensuring compatibility with integrated circuit designs and environments where space is critical.

Key technical features of the MAX840ISA+ include a low quiescent current of 504μA, enabling energy-efficient operation, and a robust output voltage adjustment capability, offering fixed -2V and adjustable output from -0.5V to -9.4V at 4mA. The regulator supports operation with small capacitors, from as low as 0.22μF, minimizing board footprint and simplifying PCB layouts. It delivers a stable output voltage with only 1mVp-p ripple, a significant factor for high-precision and low-noise requirements.

This device utilizes charge-pump switching technology, operating at 100kHz in normal mode for rapid response and at 20kHz in shutdown mode, with a maximum logic-level shutdown current consumption of 1μA over temperature. Its 8-pin SOIC package configuration allows for straightforward integration into a range of systems and supports applications such as cell phones, adjustable GaAsFET bias, GaAsFET power amplifier modules, LCD bias and contrast control, personal communicators, PDAs, regulated negative power supplies, and wireless data loggers.

Built for demanding industrial, laboratory, and commercial environments, the MAX840ISA+ features a maximum operating temperature of 85°C, ensuring thermal stability. The compact dimensions (5mm length, 4mm width, 1.5mm height) facilitate high-density PCB implementations. The device is not categorized for automotive standards but provides reliable performance within its voltage and current parameters.

Typical use cases include precision biasing for communication circuits, power management for LCD displays, and regulated negative supply generation for advanced electronic modules. Whether for industrial, laboratory, or high-volume manufacturing settings, Maxim Integrated's MAX840ISA+ delivers proven voltage regulation performance.

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