XC6221A2827R-G

Current - Output:	200mA
Base Part Number:	XC6221
Supplier Device Package:	4-USPN (0.90x1.2)
Package / Case:	4-UDFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Short Circuit
Control Features:	Enable
PSRR:	70dB (1kHz)
Current - Quiescent (Iq):	50µA
Series:	--
Voltage Dropout (Max):	0.17V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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XC6221A2827R-G is a low current, low dropout, and low noise voltage regulator. With its high stability and fast transient response capability, it is very suitable for use in various fields, especially in precision instruments, automotive products and industrial applications.The device is a positive step-down voltage regulator and can provide a constant output voltage with a wide range of adjustable current output levels. The device is designed to maintain a constant output voltage during input supply voltage changes, and can operate a wide range of input supply voltages. It contains an oscillator, a comparator, a power MOSFET, and a control logic circuit to regulate the output voltage.

Working principle

The output voltage of the XC6221A2827R-G is determined by the voltage value of the internal high reference voltage, which is compared by the comparator with the voltage of the FB pin. The output voltage is dependent on what is set on the SEL pin. The internal oscillator provides the switching frequency at 0.8MHz, and the high side power FET (PFET) is switched on according to the switching of the oscillator. When the device is first powered on, the PFET has a lower on-resistance than when the device is in working condition, allowing more current to flow from the Vin pin to the output pins of the XC6221A2827R-G. After the initialization process, the PFET slowly switches to its low on-resistance state, and the output voltage of the XC6221A2827R-G is then stabilized.To regulate the output voltage, the XC6221A2827R-G uses a Feedback Control Loop. The voltage feedback from the FB pin is compared with the high reference voltage, and if they are different, the control logic will generate an error signal that is amplified by an error amplifier which then controls the PFET accordingly. The error amplifier converts the voltage into a current, which causes the output voltage to change. The output voltage is regulated by the internal power MOSFET, and the output voltage is thereby adjusted to match what is set on the SEL pin. When the voltage at the VIN pin drops below the FB pin voltage, the output voltage also drops, causing the load current to be too large. The load current sensing on the SET pin detects the error, and sends an error signal to the error amplifier, which then turns the PFET to reduce the output voltage. It will continue to do this until the output voltage meets the required value. When the voltage at the VIN pin is higher than the FB pin voltage, the output voltage will also be higher than the set voltage. The load current sensing on the SET pin detects this error and sends a signal to the error amplifier, which will turn the PFET on to reduce the output voltage. The same process will continue until the output voltage is consistent with the setting on the SEL pin.

Application Field

The XC6221A2827R-G is a low noise, low dropout, low current voltage regulator suitable for a wide range of applications. Its ability to provide stable, low noise output and fast transient response makes it ideal for precision instruments, automotive products and industrial applications.The XC6221A2827R-G is also ideal for use in mobile phone designs, as it can be set to provide a low standby current. It is suitable for designs requiring high efficiency, such as in mobile phone chargers, where it can be used to ensure that the charger does not overheat.The XC6221A2827R-G can also be used in power management circuits for battery-powered products, such as in laptops and digital cameras. It is also suitable for other battery-powered devices, such as portable music players, where it can be used to maintain a constant output voltage and eliminate the need for a large, low-resistance battery.In addition, the XC6221A2827R-G can be used in applications with a wide input voltage range, such as solar charge controllers, in order to maintain the desired output voltage regardless of the input voltage. It is also suitable for applications requiring very accurate and stable output voltages, such as in precision measurement instruments and medical equipment. Overall, the XC6221A2827R-G is a versatile, low current, low noise, low dropout voltage regulator, suitable for a wide range of applications where stable, precise and good transient response is required.

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