ADP2139ACBZ-3.3-R7 Integrated Circuits (ICs)

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PMIC or power management ICs are designed to provide power regulation with low power loss and high efficiency. One of these is ADP2139ACBZ- 3.3-R7 which belongs to the DC- DC switching regulator category. This voltage regulator is an open-drain synchronous-rectified step-down converter converting an input voltage of up to 24 V to an output voltage of 3.3 V with various fixed output currents of up to 5 A. It has a wide input voltage range of 4 V to 24 V making it suitable for automotive, industrial and embedded applications needing a 3.3 V logic supply.

ADP2139ACBZ-3.3-R7 provides a number of features to ensure efficiency and optimal performance. It has an integrated high-side and low-side MOSFETs and a built-in programmable soft-start, frequency synchronisation and over-temperature protection. The MOSFETs have a low on-resistance resulting in low power loss, high efficiency, and fast transition from discontinuous to continuous modes.

ADP2139ACBZ-3.3-R7 is programmable for off-time, average on-time and peak current limit. The device supports various external components such as bootstrap capacitor and dead-time control resistor. Its mode is forced continuous, to prevent current peaks exceeding the peak limit setting and its feedback voltage level is precisely controlled by an internal-bandgap reference circuit. ADP2139ACBZ-3.3-R7 also has programmable precision current-sense threshold, internal loop compensation and power good signal.

This voltage regulator can be used in a wide range of applications such as communications systems, automotive battery and power distribution systems. It is suitable for low voltage applications, such as lighting, digital signage, and portable electronics like cell phones, tablets and wireless networking equipment. By combining its high efficiency and low power loss, ADP2139ACBZ-3.3-R7 is well suited for low-loss, compact portable power designs.

The working principle of ADP2139ACBZ-3.3-R7 is based on the synchronous rectification and step-down topology. Firstly, the input voltage is converted to an intermediate DC voltage which is then regulated to the desired output voltage using one or more synchronous rectifiers. This intermediate voltage is then stepped down to the required output voltage using a synchronous rectifier, thus converting the input power to the output power.

The MOSFETs are responsible for the efficiency of the converter, as the low on-resistance reduces the power loss in the MOSFETs. In addition, integrated features such as frequency synchronization, programmable soft-start, average-on time control, over-temperature protection, and programmable peak current limit, ensure optimal performance and high efficiency, while controlling the output power.

ADP2139ACBZ-3.3-R7 is a popular DC-DC switching regulator with a wide variety of applications from automotive to industrial. Its low on-resistance MOSFETs, integrated features, wide input voltage range and programmability, make this voltage regulator a versatile and efficient solution for any power application.

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