PQ05RD21

Voltage Dropout (Max):	0.5V @ 2A
Supplier Device Package:	TO-220-4
Package / Case:	TO-220-4
Mounting Type:	Through Hole
Operating Temperature:	-20°C ~ 80°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	55dB (120Hz)
Current - Quiescent (Iq):	10mA
Current - Output:	2A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction:The PQ05RD21 is a linear voltage regulator that provides a stable fixed output voltage while regulating power supply voltage inputs. It is a cost-effective and reliable choice for most applications where fixed output voltage regulation is required. The device has low power consumption and can provide either a fixed 3.3V output or an adjustable output between 1.8V and 5V, allowing it to be tailored to specific power supply design requirements. The device also features current and thermal protection, short circuit protection, an enable/disable feature, two output enable pins, and a low-current enable/disable control scheme.Device Features & Benefits : The PQ05RD21 Voltage Regulator has several features and benefits which make it an ideal choice for a wide range of applications requiring fixed voltage regulation. The device has a low operating current of 10mA, an adjustable output voltage range of 1.8V to 5V, a low dropout voltage of 1.35V for 0.2A load current, and both current and thermal protection. Additionally, the device has two output enable pins, allowing it to be enabled/disabled using a low-current control circuit. It also provides short circuit protection and a soft-start feature.Application Field : The PQ05RD21 voltage regulator can be used in a variety of applications, including general-purpose systems, portable electronics, and telecommunications systems. In addition, it is suitable for use in automotive, industrial, and medical systems that require a fixed output voltage. Examples of applications where the device could provide benefit include powering radio receivers and transceivers, providing a regulated 5V supply to a microcontroller, and providing a regulated voltage to voltage level translators. Working Principle : The PQ05RD21 operates according to the well-known linear-voltage regulating principle. The input voltage is applied to the device and then passed through a series of resistors and diodes. This voltage is then compared to a reference voltage to determine the output voltage. When the voltage supplied equals the reference voltage, the output voltage remains stable. If the input voltage rises, the output voltage is reduced. If the input voltage drops, the output voltage is increased. This process provides an adjustable, stable output voltage that is independent of the input voltage fluctuations.Package and Pin Details : The PQ05RD21 is available in a SOP-8 package, with a pin-out layout as shown below. The package size allows for easier mounting and routing in end-product designs. PIN#1 - GroundPIN#2 - Enable 1PIN#3 - Output VoltagePIN#4 - Input VoltagePIN#5 - Enable LowPIN#6 - GroundPIN#7 - Output VoltagePIN#8 - Input VoltageConclusion : The PQ05RD21 is a linear voltage regulator that can be used to provide a stable fixed output voltage, while regulating power supply voltage inputs. The device has low power consumption, adjustable output voltage range, current and thermal protection, two output enable pins, and a low-current enable/disable control scheme. The device is available in a SOP-8 package and can be used in a variety of applications, including general purpose systems, portable electronics, and telecommunications systems.

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