LP5550SQ/NOPB Integrated Circuits (ICs)

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The LP5550SQ/NOPB is a PFM (pulse frequency modulation) step-down DC/DC converter module. It\'s a power management IC (PMIC) designed primarily to provide high-efficiency, low-dropout regulators for portable and battery-powered systems with tight space constraints. It comes in a 4mmx4mm 64-pin quad flat no-lead (QFN) package. The LP5550SQ/NOPB is part of Texas Instruments’ suite of power management products dedicated to providing the latest and highest-performance power management solutions to customers across a variety of industries.

LP5550SQ/NOPB is a specialized PMIC, a regulated switch mode charge pump (RSMCP) that generates multiple output voltages. The output voltages can be configured and adjusted through external resistor divider networks. The built-in intelligent circuit provides precise regulation of the output voltages and can also compensate for voltage drops resulting from changes in external resistance, ensuring accurate output and precise regulation over the entire operating range. The chip’s wide input voltage range of 2V-5.5V allows the use of a variety of battery types, and its low quiescent current and high efficiency means it is suitable for a wide range of battery-powered applications.

LP5550SQ/NOPB has three output channels, each providing a configurable output voltage between 0.7V and 5V, with a maximum output current of 250mA. The chip integrates a 1.2V linear regulator to provide a stable reference voltage for all three channels. It also contains two dedicated control pins that allow the chip to switch between single-ended and differential outputs, allowing the user to configure it to operate in either bidirectional or unidirectional mode.

LP5550SQ/NOPB has an integrated 1.25A peak output current limit that ensures stability of its outputs in applications with variable loads. The chip also contains enable/disable functions, allowing the user to control the output power state by external control signals, effectively providing power gating capabilities to further reduce power consumption. It also includes thermal protection, under-voltage lockout and current limiting functions.

LP5550SQ/NOPB can be used in applications such as portable and custom-designed power systems employing Li-ion or Li-polymer batteries, as well as other battery chemistries. Examples of applications include battery management systems, mobile phones, industrial controllers, and medical systems. It is also suitable for automotive and consumer electronics applications.

In summary, LP5550SQ/NOPB is a specialized PMIC that provides a configurable multiple output voltage with precise regulation and power gating capabilities. It is a PFM step-down DC/DC converter that offers wide input voltage range, low quiescent current, and high efficiency, making it suitable for a variety of portable and battery-powered applications. It can be used in automotive and consumer electronics, mobile phones, battery management systems, industrial controllers, and medical devices.

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