MC34166THG

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The MC34166THG is an integrated circuit from the PMIC (Power Management IC) family, more specifically a DC DC switching regulator. It is used for low noise output regulation for applications such as mobile phones and notebooks. It is a synchronous buck converter with a fixed frequency of 600 kHz, that delivers a DC output voltage of 0.6V to 5.5V and up to 3.3A. It has an operating temperature range of -40°C to +125°C.

It features two internal low power 5V linear regulators, one to power the main control loop and one to provide power to the output stage. It also features two capacitors, one located to the left of the output stage, and one located to the right. These two capacitors are used to filter out noise in the output stage, as well as to improve efficiency and reduce power dissipation.

The MC34166THG has integrated MOSFETs for synchronous buck conversion, which are capable of delivering up to 3.3A of output current. It also has an oscillator and PWM controller circuitry which provide adjustable duty cycle control. The output voltage is adjusted by a resistive voltage divider connected to one of the pins, allowing for external voltage programming.

The MC34166THG also features several protection mechanisms, such as over temperature, over current, and under voltage protection. It also has an internal soft start mechanism to reduce the inrush current. The added shutdown pin allows for hardware inclusion of a power on/off switch.

The MC34166THG is also compatible with some Lithium-Ion batteries and can deliver up to 1A of output current. For improved efficiency, it can also operate in Sleep mode, in which the MOSFETs are disabled and all current is redirected to the load, resulting in extremely low power consumption.

The MC34166THG has several applications including mobile phones, notebooks, industrial, automotive, and medical applications. It is a reliable, cost effective way to provide low noise, low ripple output regulation in these types of applications.

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