AP139-33WG-7

Current - Output:	300mA
Base Part Number:	AP139
Supplier Device Package:	SOT-25
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	75dB ~ 30dB (1KHz ~ 100KHz)
Current - Quiescent (Iq):	60µA
Series:	--
Voltage Dropout (Max):	0.45V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The AP139-33WG-7 is a linear voltage regulator designed and produced by Protek Electronics Co., Ltd. The device is a 6-pin regulator that can be used in a variety of applications. This article will provide information on the applications of the AP139-33WG-7 and the working principle behind its operation.

Applications

The AP139-33WG-7 can be used in automotive, marine and other industrial applications. At just 7.2mm x 5.1mm, it is suitable for applications with limited space. It is also suitable for applications requiring voltage stabilization due to its low output noise, low drop out voltage and fast transient response. The AP139-33WG-7 can operate from a wide input voltage range of 3.0 - 36V and can provide an output voltage of 3.3V.

Working Principle

The AP139-33WG-7 consists of an input pin, an output pin, three control pins and a ground pin. The input pin is used to supply the input voltage to the regulator and the output pin is used to supply the output voltage. The three control pins are connected to the comparator, which is used to set the output voltage.The AP139-33WG-7 uses a three-terminal feedback voltage regulator with a bandgap reference to provide the output voltage. The bandgap reference provides a stable reference voltage that is proportional to the absolute temperature. The output voltage is determined by the voltage difference between the reference voltage and the external feedback voltage.A PWM circuit is used to control the current going to the transistor. The PWM circuit modulates the current to maintain a constant output voltage. The transistor then controls the voltage at the output pin by adjusting the amount of current flowing through it.

Conclusion

The AP139-33WG-7 is a linear voltage regulator designed and produced by Protek Electronics Co., Ltd. It is suitable for a variety of applications, including automotive, marine, and other industrial applications. The device uses a three-terminal feedback voltage regulator with a bandgap reference to provide the output voltage. It is also equipped with a PWM circuit to control the current going to the transistor, allowing precise voltage regulation.

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