MC33166TV

Voltage - Output (Min/Fixed):	5.05V
Base Part Number:	MC33166
Supplier Device Package:	TO-220-5
Package / Case:	TO-220-5 Formed Leads
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	72kHz
Current - Output:	3.3A (Switch)
Voltage - Output (Max):	40V (Switch)
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	7.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down
Part Status:	Obsolete
Packaging:	Tube

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MC33166TV Application Field and Working Principle

The MC33166TV is a pulse width modulation (PWM) switching regulator controller featuring true current mode control. This device is ideal for use in battery-powered mobile product designs, featuring low quiescent current, fast transient response and a wide range of low drop-out outputs.The MC33166TV is part of the PMIC (Power Management Integrated Circuit) product family that specializes in voltage regulators, DC-DC switching regulators and other power solutions for variety of applications. The MC33166TV is designed for cost-sensitive battery-powered applications, such as mobile phones, digital cameras, PDAs, electronic toys, etc.

Application Field

The MC33166TV can operate from an input voltage range of 2.5V up to 6.0V. It can provide continuous output current of up to 2.0A with high efficiency, which makes it suitable for a variety of applications. Its low onboard voltage accuracy and low power consumption make it ideal for cost-sensitive mobile designs.The device also features a high switching frequency of up to 500KHz, allowing it to achieve high efficiency designs with small external components.The MC33166TV can be used to regulate voltages in a variety of battery powered applications, such as mobile phones, digital cameras, PDAs, electronic toys and more.

Working Principle

The MC33166TV features true current mode control, which allows the device to achieve a constant output current, regardless of changes in load conditions. The circuit includes an internal oscillator and a small external capacitor connected to the TIMING pin, which is used to set the frequency of the oscillator.The oscillator generates a series of pulses, which is then divided up into two complementary PWM pulses by the internal divider. These two PWM pulses are then applied to the base of an external pass transistor via the DRIVE pin, generating a switching action which is proportional to the duty cycle of the PWM pulses.The PWM pulses also control the output current of the pass transistor, which is regulated by the sense resistor connected at the output of the pass transistor. The value of the sense resistor affects the output current of the device, and this can be adjusted to get the desired output current regulation.

Conclusion

The MC33166TV is a cost-effective pulse width modulation (PWM) switching regulator controller designed for use in battery powered mobile product designs. It features true current mode control, low quiescent current, fast transient response, a wide range of low drop-out outputs, and a high switching frequency of up to 500KHz. It can be used to regulate voltages in a variety of applications such as mobile phones, digital cameras, PDAs, electronic toys and more.

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