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MAX17242ETPB+

The MAX17242ETPB+ is a triple-output step-down DC-DC converter from Maxim Integrated and is targeted at 3.2V to 5.5V battery-powered applications. It has an advanced compact size, low-quiescent current and high efficiency. This device provides a combination of a low-power buck (DC-DC switching regulator) and an ultra-low-power linear regulator. The low-power buck allows for fast transient response from its high-side and low-side N-channel MOSFETs, runnin up to 2MHz and is capable of switching up to 1.1A. The ultra-low-power linear regulator provides precision 2.5V/2A outputs.

Application fields

The primary applications for MAX17242ETPB+ are Wearable devices, Handhelds and Portable Electronics and IoT applications. It can be used to provide the power distribution rails for a number of different applications, including ultra-low power IoT nodes, Bluetooth-enabled wearables, and sophisticated battery-powered portable electronics devices. It is ideal for low-power microprocessor devices. It can also be used to provide power isolation and noise reduction in devices such as video applications.

Working Principle

The MAX17242ETPB+ is a 3 independent-buck converter that feature a high-side and low-side N-channel MOSFETs, allowing it to deliver fast transient response and high efficiency. The inputs are supplied from either a battery or an external power source, while the outputs are regulated to the desired output voltages. The constant-frequency current-mode control architecture allows for fast transient response while providing excellent load and line regulation, and is configurable via external resistor dividers.

The combination of the high-side and low-side MOSFETs allows for high efficiencies over a wide range of input voltages. The embedded multiplier helps maintain constant switching frequencies over the device\'s input-voltage range, allowing for optimized efficiency. The device also feature a low-power mode, allowing for lower current consumption when the load is low.

In addition to its switching controller, the MAX17242ETPB+ also feature an ultra-low-power SHDN pin interrupt for the 2.5V output, allowing for precise control over when the output is active. The device also feature an integrated regulator with a power-save mode, allowing for further savings in power consumption when the load current is low. The input supply voltage range of the MAX17242ETPB+ allows for operation from single-cell Li-Ion and LiFePO batteries.

Conclusion

MAX17242ETPB+ is a triple output step-down DC-DC compliant to PMIC - Voltage Regulators - DC DC Switching Regulators, providing precision 2.5V/2A outputs with superb efficiency, high-side and low-side N-channel MOSFETs, and a low-power mode.

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