MC33167D2TR4G

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The MC33167D2TR4G is an integrated switching regulator designed specifically for applications with high power dissipation and supply voltage in a very small form factor. This device includes a two-phase, step downPower Switch Controller for DC-DC buck or buck-boost applications. It employs Integrated Pulse Frequency Modulation (PFM) and Peak Current Mode (PCM) control, allowing superior performance in high current applications while still providing efficient operation.

The MC33167D2TR4G is designed to provide an integrated solution which enables designers to reduce component count, minimize board space, and simplify system design. It combines a current mode control PFM/PCM controller withtwo power switches, two current sense resistors and two bootstrap capacitors in a small 4mm x 4mm QFN. This device operates over a wide 4Vto 32V input voltage range and allows output voltages from 0.7V to 28V. It supports up to 6A continuous output current and allows a wide temperature range.

In applications where transient response is critical, such as fast Ethernet networks or high end digital audio applications, theMC33167D2TR4G provides excellent line and load regulation performance. With its two 2.4mΩ power switches and its selectable PFM/PCM mode, it offers very low output voltage ripple, low power dissipation, high efficiency and a fast load transient response.

The MC33167D2TR4G is designed to offer a simple solution for power conversion. It allows the maximum flexibility with its onchip features, such as On/Off control and synchronization to an external clock. In applications where multiple voltage rails are needed, the MC33167D2TR4G can be used as parallel load and tied together.

The MC33167D2TR4G works on the principle of voltage feedback. It monitors the output voltage and adjusts the duty cycle of theoutput device to maintain the set output voltage. The output voltage is determined by an internal reference and the value of an external feedback divider resistor. The duty cycle of the output device is controlled by the Peak Current Mode (PCM) algorithm which responds quickly to changes in load current, ensuring accurate output voltage regulation.

The MC33167D2TR4G also provides robust protection features. It includes an overvoltage protection (OVP), a power-on reset(POR) circuit, an overload protection (OLP) circuit, an undervoltage protection (UVP), and an overcurrent protection (OCP) circuit. These features provide robust protection against short circuits and unexpected overvoltage or undervoltage conditions.

The MC33167D2TR4G is suitable for a wide range of high current applications, including computer server power supply, LCD TV power supply, and automotive DC-DC converter. It is also well suited for any application where high performance, small size and cost efficiency are desired.

In short, the MC33167D2TR4G is an advanced and integrated switching regulator, offering maximum flexibility and excellent performance in high current applications. With its integrated Pulse Frequency Modulation (PFM) and Peak Current Mode (PCM) control, it provides very low output voltage ripple, high efficiency, and a fast load transient response. Moreover, its robust protection features provide maximum reliability and system protection.

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