MIC38C45-1BM

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The MIC38C45-1BM is a member of the Voltage Regulators - DC DC Switching Controllers (VRCs) family of products. They are highly integrated and complete phase-shift pulse-width modulation (PWM) and pulse-code modulation (PCM) control circuit that combines a low-dropout (LDO) regulator, dual active clamps, MOSFET drivers, a voltage reference and a power-good monitor. All the features are implemented to provide power converters with high performance, small size, minimal external components and low cost.

The MIC38C45-1BM is specifically suited for the two major types of switching DC/DC converter topology, current-mode-controlled converters with quasi-resonant operation, including flyback, forward, push-pull, sepic, Π converters and voltage-mode-regulated applications as buck and boost converter.

The MIC38C45-1BM has a very low quiescent current and offers high efficiency under all operational conditions. The quiescent current is minimized due to the shutdown and soft start features, which allow the switching regulator not to draw any current when the control pin is tied at 0 V. This will also improve the system’s efficiency as the system does not need to account for the quiescent current of the controller.

The MIC38C45-1BM provides a mode select pin that allows selecting between the current mode and voltage mode control schemes. The output voltage can be programmed by two external resistors and the minimum output voltage can be adjusted to different voltage thresholds by the enable pin. This provides an improved system flexibility and allows it to be used in different applications.

The MIC38C45-1BM also has wide range of built-in protections that make it an ideal choice for switching regulators. It has a short-circuit protection and a thermal protection that can detect and shutdown the system when the temperature reaches the critical level. It also has an active clamp feature that provides better transient performance and higher efficiency by preventing excessive current flow from the output capacitor.

The MIC38C45-1BM is a very versatile DC/DC controller for a wide variety of applications. Its highly integration and low quiescent current provides greater flexibility and efficiency. Its wide range of built-in protections and mode selectability helps to improve system reliability and performance.

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