REG102GA-AG4

Current - Output:	250mA
Base Part Number:	REG102-A
Supplier Device Package:	SOT-223-6
Package / Case:	SOT-223-6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	65dB (120Hz)
Current - Supply (Max):	800µA
Current - Quiescent (Iq):	500µA
Series:	--
Voltage Dropout (Max):	0.27V @ 250mA
Voltage - Output (Max):	5.5V
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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REG102GA-AG4 application field and working principlePower Management Integrated Circuits (PMICs) are important components in electronic systems and play a key role in improving the performance of modern products. Since the demands of the electronic products are ever increasing, the power supply and power management integrated circuits continue to develop, PMICs have become more versatile and smarter, and their application fields have been further expanded. The REG102GA-AG4 voltage regulator is a linear type PMIC specially developed by RICOH, which is widely used in various fields such as automotive, industrial, computer and communication (IaC), and medical equipment.The REG102GA-AG4 is a positive voltage regulator, which can achieve ±2.0% accuracy of output voltage. Its combination of low dropout voltage, fast response and good accuracy makes it ideal for applications requiring stable and precise voltage regulation. Its power supply range is from 1.2V to 18V, the output current can reach up to 500mA, and the operating temperature range is from -40℃ to +125℃. In addition, the quiescent current is only 10uA, which can achieve lower standby current, further increasing system power efficiency.The working principle of the REG102GA-AG4 PMIC is quite simple. It consists of a voltage divider and a series of transistors and resistors. When the input voltage is applied, the voltage divider will divide the input voltage into a certain reference voltage and an error voltage. The error voltage is then sent to the non-inverting input of the comparator. The inverting input of the comparator is connected to an integrated reference voltage, and the output of the comparator is connected to the base of an emitter follower transistor. So when the error voltage is greater than the reference voltage, the base voltage of the transistor will increase, so that the transistor will conduct and the output voltage will drop, which the circuit will recognize as a higher output voltage. The effect of this feedback loop will automatically adjust the output voltage to maintain a constant voltage. The power fet transistor can shoulder large current, which has strong over current protection ability.In addition, the REG102GA-AG4 PMIC also provides excellent transient protection performance. Its transient response can be fast enough to suppress high input voltage transients quickly and accurately, with minimal overshoot and undershoot. Its high power supply rejection (PSR) can also improve regulation accuracy, which ensures stable current and voltage output. In addition, its load regulation and line regulation are also significantly improved compared to traditional regulators, which can meet the demand of very strict voltage accuracy.Overall, the REG102GA-AG4 voltage regulator is a reliable and efficient PMIC, which can be widely used in automotive, industrial, computer and communication (IaC), and medical equipment. With its high accuracy and fast response, it can meet the needs of various voltage-regulated applications, providing high efficiency and stability.

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