MIC4680BM-TR

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The MIC4680BM-TR is part of the family of DC DC switchmode step-down regulators from Micrel Inc. It is specifically designed to deliver high current with output voltage accuracy that can be adjusted over a wide range. The device is feature rich and provides a wide range of output voltage adjustment, circuit protection and operational control. The device is suitable for a wide range of applications including industrial, computere and telecommunication equipment, motor control and battery charging.

The device is based on a high efficiency fixed frequency current mode architecture which provides low part count solution with short response time and closely regulated output voltage. It has an integrated low power pre-regulator with low drop-out voltage, so that the device can be used in severe conditions such as automotive environment. It also features an integrated linear controller that reduces any oscillations in the output, as well as a floating output for noise control.

The MIC4680BM-TR provides accurate output voltage regulation and has several built-in protection functions. The integrated protection functions include over-voltage protection (OVP), over-temperature protection (OTP) and short circuit protection (SCP). It also has an input overvoltage protection (OVP) to prevent damage to the device in case of high voltage transient. The device includes a power-on reset (POR) function to ensure smooth start-up.

The MIC4680BM-TR is capable of delivering up to 3A of output current and is completely programmable for output voltage, current limit and other operational settings. The device also offers a wide range of output voltage accuracy, from 0.9V to 8V. The device is available in an integrated SOIC-8 lead-free package, with a maximum operating temperature of 125°C. It is also RoHS compliant.

In terms of operation, the device uses a switchmode step-down topology which converts a higher input voltage to a regulated lower output voltage. The device consists of an internal power switch, a control circuit, an inductor and an output capacitor. The internal power switch is controlled by the control circuit, which regulates the output voltage. The input voltage is applied to the power switch, which then switches either fully on or fully off, and the associated control circuitry manages the switching frequency, voltage and current.

Once the input voltage is applied to the device, the control circuit turns on the power switch and the inductor acts to store energy in the form of current. When the switch is turned off, the inductor releases the stored energy in the form of current, and the associated capacitor filters the current and maintains the output voltage. This process repeats continually, resulting in a regulated output voltage.

The MIC4680BM-TR is a powerful and feature-packed DC DC switching regulator, suitable for a wide range of applications where high output current along with precise output voltage accuracy is required. The device offers protection functions that protect the circuit from damage due to transient and overvoltages, and has an integrated power-on reset to ensure smooth start up. The device is available in an integrated SOIC-8 lead-free package and is RoHS compliant.

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