MC33163DWG

Voltage - Output (Min/Fixed):	1.25V
Base Part Number:	MC33163
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	50kHz
Current - Output:	3.4A (Switch)
Voltage - Output (Max):	40V (Switch)
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction

The MC33163DWG voltage regulator is a popular DC-DC switching regulator that has been designed to provide reliable, efficient and low cost power converters. The device is capable of regulating a wide range of input voltages and output currents and provides a compact solution for applications such as automobile, communication, industrial, computer, and consumer electronics. This application note will discuss the features, working principle and application field of the MC33163DWG voltage regulator.

Features

The main features of the MC33163DWG voltage regulator include: • Built-in current-mode PWM control circuit; • Output over-voltage protection; • Low quiescent current; • Built-in short-circuit current limit protection; • Internal temperature foldback; • Optimized gate drive output; • Over-temperature protection; • Over-voltage protection; • Under-voltage lock-out protection; • Internal high-voltage start-up circuit; • Low output voltage ripple; • Soft-start operation; • Timer-short circuit protection; • Low power consumption; • Internal high-voltage start-up circuit.

Working Principle

The MC33163DWG voltage regulator is a current-mode pulse width modulation (PWM) DC-DC controller. It uses an internal control loop to compare an internal reference voltage to an external voltage (either from an error amplifier or from the output of the regulator itself). When the feedback loop senses an error (a difference between the external and internal voltages), the controller then changes the duty cycle of the PWM output signal to adjust the voltage accordingly.The PWM output signal is used to drive the power MOSFET of the DC-DC converter, which in turn controls the voltage at the output of the regulator. The output voltage is kept at a constant level by adjusting the duty cycle of the PWM output signal to maintain the reference voltage. This allows for precise and efficient regulation of the output voltage, even in the presence of large load and line swings.

Application Field

The MC33163DWG voltage regulator is suitable for numerous applications such as computer, communication, automobile, industrial and consumer electronics. It is also suitable for low power regulated supplies, DC/DC board power supplies, voltage preregulators, battery-backed supplies and supply sequencing/monitoring applications.The device is also ideal for applications needing precise accuracy such as load drivers, battery chargers, and DC/DC converters. The device can also be used in switching applications such as motor drivers, power supplies, and in current mode applications such as INTEL and AMD processor supplies.

Conclusion

The MC33163DWG voltage regulator is an efficient, reliable, and low-cost DC-DC switching regulator with a wide range of input and output voltages. It is capable of supporting a variety of applications in the computer, communication, automobile, industrial, and consumer electronics industries. The device features an internal current-mode PWM control circuit and a range of protection features such as over-voltage, over-temperature, and under-voltage lock-out protection. The device is well-suited for applications needing precise accuracy and is capable of delivering low output voltage ripple and low quiescent current.

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