MIC2178-3.3YWM

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The MIC2178-3.3YWM is a DC/DC Switching Regulator IC (Integrated Circuit) for use in 3.3 V DC-DC power supplies. It is a highly integrated, low-cost, low-power solution for providing regulated outputs from input voltages of up to 12 VDC or 18 VDC. It is designed to provide an output voltage that is adjustable from 2.5 V to 3.9 V, with an overall accuracy of ±1%. The device features Internal current limit, thermal regulation, and fine trimming of output voltage. The MIC2178-3.3YWM is intended for applications such as Set Top Box (STB), Portable Media Player (PMP), Notebook Computer, LCD Monitor, and Digital Cameras.

The MIC2178-3.3YWM uses a low-loss circuit configuration that helps to save power when compared to traditional linear regulators. The core of the IC is a Pulse Width Modulated (PWM) regulated switching regulator circuit. The device operates with a fixed frequency of 300 KHz, which helps to reduce the size of the external components. The output voltage is regulated by varying the duty cycle of the PWM pulses. This IC also features an internal logic level MOSFET switch that enables simple and cost effective implementation of the power supply.

The MIC2178-3.3YWM can be used to provide an output of 3.3 V, or any voltage between 2.5 V and 3.9 V. The output voltage can be adjusted by setting the value of the external Vref resistor. The current limit of the device can be set using an external resistor. The device also features thermal protection and control circuitry that protect the IC from thermal runaway and other fault conditions.

The MIC2178-3.3YWM is ideal for low-power systems where the requirement is to have a low component count and low solution cost. It is particularly suitable for STB and PMP applications where it reduces the component count and PCB space, as well as reduces the component cost for these applications. The built-in logic level MOSFET switch also makes it suitable for low-power Notebook, LCD Monitors and Digital Cameras.

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