MC34167TV

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The MC34167TV is a green-mode, step-down DC-DC converter, switching regulator integrated circuit developed by ON Semiconductor. It is part of the \'ZENER Simplified\' Synchronous Buck product portfolio. It is used in low power applications as a low cost, space-saving IC solution to step-down voltage levels from a higher input voltage rail to a lower regulated output voltage. Applications include power supplies, battery charging, on-board DC-DC converters and audio amplifier supply control.

As far as voltage regulation is concerned, the MC34167TV utilizes an advanced control scheme classification groups according to its working principles. The concept of advanced control schemes for DC-DC switching regulators is based upon improved stability and response capability as compared to simpler voltage regulators. This advanced control scheme is based upon a fixed frequency pulse frequency modulation (PFM) technique, which ensures that a stable, accurate output is maintained even when the input-output conditions, load, or temperature vary.

The MC34167TV operates in three main modes: steady, regulation and fault. During steady mode when all parameters are stable, the converter is able to maintain a constant output voltage. During regulation, the converter applies any necessary changes in the output voltage to maintain regulation. Fault mode is enabled when an overcurrent or overvoltage protection triggers, reducing maximum output power to ensure the circuit is protected.

The integrated MOSFET switch makes MC34167TV an optimized solution for applications ranging from 3Vendors to 24V and >8V, depending on the input voltage range. Low power consumption and high efficiency makes this IC suitable in low power applications and high power systems. The device offers peak current mode control, which is composed of a slope and peak current generator, thus providing a constant-frequency, fixed on-time operation for improved light load efficiency.

The MC34167TV features a low power Wake Up/Shut Down logic, allowing the converter to maintain minimum standby power consumption. This makes the device ideal for applications that need to maintain a low power state when no load is present or when a low power status is signaled. The device offers low quiescent current and the ability to adjust the output voltage in two ways: through an external resistor divider or via digitally controlling an internal band gap reference.

In summary, the MC34167TV is a low power, low cost, efficient, space-saving IC solution for switching voltage regulation applications. The device offers advanced control schemes, fault protection, adjustable output voltages, low power wake up/shut down logic and peak current mode operation, making it an ideal choice for all types of low power, DC-DC voltage regulation applications.

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