MIC39151-1.8WT

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The MIC39151-1.8WT is a high performance, low quiescent current, low dropout linear voltage regulator. It is a three-terminal, adjustable device that provides an adjustable, regulated output voltage range from 1.2V to 13.2V with a maximum maximum output current of 1.5A and a current limit of 5.5A. The MIC39151-1.8WT is designed with a low dropout voltage that minimizes system power dissipation. Its design reduces power dissipation and overall system cost.

The MIC39151-1.8WT’s main application field is in portable and cost-sensitive products. It can be used for all kinds of battery powered products such as digital still cameras, camcorders, PDAs, smartphones, and other handheld electronic devices. The MIC39151-1.8WT provides a cost-effective way to reduce system power dissipation and prolong battery life, while delivering excellent transient response performance and extended temperature range operation.

The MIC39151-1.8WT utilizes a conventional design topology with a PNP-type shunt pass transistor. This bipolar pass device is uniquely implemented using a low resistance substrate and a low-resistance inductive winding surrounding the shunt transistor. This reduces the voltage drop across the load and allows the regulator to maintain a low quiescent current. The mechanical properties of the winding also provide excellent thermal dissipation, making the regulator more stable with higher temperature operation.

The control circuit is composed of an error amplifier and an external precisely trimmed resistor divider. When the output voltage drops, the error amplifier will drive the line through the feedback network, increasing the bias current and reducing the line resistance. This action, in turn, adjusts the output voltage to the desired level. In normal operation the MIC39151-1.8WT automatically maintains a low dropout voltage, typically 0.2V, at full load.

The MIC39151-1.8WT is an easy to use and cost-effective linear voltage regulator that can be used in a variety of applications. Its low power dissipation and adjustable output voltage make it ideal for many low current applications. The MIC39151-1.8WT’s extended temperature range design ensures that it can handle temperature extremes. With its excellent transient response, the MIC39151-1.8WT is suitable for applications ranging from portable electronics to industrial.

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