MC34163DWG

The MC34163DWG is a monolithic integrated circuit primarily intended for use as a self-contained FET or bipolar switching regulator in many applications such as on-board DC-DC converters, portable battery powered equipment and PCs.

This device offers features such as low dropout voltage, wide input and output voltage range, fast transient response, current and thermal overload protection, frequency compensation, over current limiting, and under voltage lockout. The wide input and output voltage range, fast transient response and low drop out voltage makes this device suitable for many applications.

Application Field

The MC34163DWG is primarily designed for use in on-board DC-DC converters, portable battery powered equipment and PCs. It is useful for applications including step-down DC-DC converters, step-up/step-down converters, buck/boost converters, positive/negative converters, or any application requiring a simple, low cost, high efficiency DC-DC switching regulator.

Working Principle

The MC34163DWG works on the principle of self-contained FET or bipolar switching regulators which use pulse width modulation (PWM) to regulate output voltage. The PWM controller with oscillator, internal regulation and output enable circuitry reduces external component requirements. It also eliminates the need for external loop compensation, resulting in a simple, low cost, high efficiency DC-DC switching regulator.

The MC34163DWG utilizes a constant-frequency PWM step-down/step-up converter combined with a voltage sensing and loop compensation circuitry which provides feedback to the pulse width control circuit to regulate output voltage. The device has an internal current limit, thermal shut-down, and under voltage lock-out to protect the device from overtemperature and overload. The output voltage can be set by a single external resistor.

The MC34163DWG is also equipped with a second external resistor to set the maximum switching frequency. This can be used to reduce EMI and circuit complexity. Output current can be limited by an external series resistor, and a soft start feature limits in-rush current during start-up.

The MC34163DWG features a wide input voltage range of 5.5V to 36V and output voltage range of 0.8V to 32V. It has high efficiency (up to 95%), high switching frequency (up to 1MHz), fast transient response, low dropout voltage (as low as 400mV), and low quiescent current (as low as 10uA). It also has current and thermal protection, over current limiting, and under voltage lockout.

Overall, the MC34163DWG is a monolithic integrated circuit primarily intended for use as a self-contained FET or bipolar switching regulator in many applications such as on-board DC-DC converters, portable battery powered equipment and PCs.