MAX1847EEE+

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Voltage regulators are critical components in many applications, as they help to provide a continuous power-supply and regulate the output voltage to the appropriate level for a given system. The MAX1847EEE+ is a unique DC-DC switching controller that enables highly efficient voltage regulation using Pulse Width Modulation (PWM) or Pulse Frequency Modulation (PFM). This device features programmable switching frequency and enables up to 95% regulation efficiency. Furthermore, solutions using the MAX1847EEE+ can offer both positive and negative output voltages, making it a flexible choice for many applications.

The MAX1847EEE+ is a low-cost, low-power, stand-alone voltage regulator IC designed to take the hassle out of implementing a DC-DC switching power source. This provides users with a range of features and benefits that make it ideal for a variety of applications, such as powering up to 6 cells in automotive and portable applications, laptop computer power supplies, telecom, and industrial settings.

The device supports an input voltage range of 1.8 V to 5.5 V and requires no external components to regulate a voltage. Its power-saving PFM/PWM regulating mode is also programmable, allowing for further customization of the output voltage. This is particularly useful for battery charging cycles, where undervoltage and overvoltage conditions can be prevented by reducing the lowest input voltage and cutting the output voltage in a regulated manner.

At the heart of the MAX1847EEE+ is a selectable constant frequency peak current-mode PWM controller that provides accurate, fast, and responsive regulation. The device also features low start-up and shutdown current to help conserve battery life. The integrated power MOSFET helps reduce external component count and produces low operating and standby losses. Furthermore, protection features are built-in, such as over-current protection, under-voltage protection, loop compensation, and reverse battery protection.

The MAX1847EEE+ is designed down to the nanometer scale and has a single-pin enable control that allows for easy integration with a wide range of systems. Its sloped soft-start time helps to mitigate the inrush current when powering up the system. An internal clock is available to synchronize the output voltage during startup and the device reduces current consumption during standby. Other features include low standby power dissipation, adjustable switching frequency, enable control for ON/OFF control, thermal protection, and programmability of the ON/OFF ratio.

The combination of the PFM/PWM regulation, multiple protection features, and single-pin enable control makes the MAX1847EEE+ a suitable choice for many portable and energy-efficient applications. The device is available in a 5x5 mm, 14-pin TSSOP package with 2.3 mm profile. It is suitable for use in extreme temperature environments and can operate over a wide input voltage range. Due to its features and flexibility, it is one of the most attractive DC-DC switching regulators on the market today.

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