ADP172ACBZ-1.8-R7

Current - Output:	300mA
Base Part Number:	ADP172
Supplier Device Package:	4-WLCSP (0.95x1.03)
Package / Case:	4-UFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	73dB ~ 47dB (1kHz ~ 100kHz)
Current - Supply (Max):	260nA
Current - Quiescent (Iq):	60µA
Series:	--
Voltage Dropout (Max):	0.1V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	3.6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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ADP172ACBZ-1.8-R7 Application Field and Working Principle

ADP172ACBZ-1.8-R7 is an integrated circuit sold by Analog Devices, Inc. ADP172ACBZ-1.8-R7 is categorized as PMIC - Voltage Regulators - Linear. It is a low drop out linear regulator, which provides low noise and logic controlled shutdown. The output current capability is up to 600mA and output voltage can be adjusted from1.8 V down to 0V.

Application Field

ADP172ACBZ-1.8-R7 can be used in a variety of applications ranging from communications to industrial, from consumer electronics to automotive, and more. It is mainly used as a voltage regulator and DC/DC converter in devices that require low power and low current noise. It is also used to power static RAMs, FPGAs, ASICs, and embedded microcontrollers.

Working Principle

ADP172ACBZ-1.8-R7 consists of an operational amplifier, a feedback network, and additional components including an N-MOSFET switch. The operational amplifier amplifies the error between the output voltage and a reference voltage. The P-MOSFET switch is on when the error is greater than a certain threshold. The feedback network applied all source voltage minus the fed back voltage from the output, giving the output voltage a certain regulation ability.The output voltage is controlled by the loop gain of the operational amplifier. When the output voltage drops, the operational amplifier increases the current to the N-MOSFET switch, switching the P-MOSFET on. Thus, the output current is increased until the output voltage reaches the setpoint. The output voltage will remain stable.The shutdown controls enable the user to make the circuit shut off the voltage by applying logic low to the enable pin. This prevents the IC from over-powering the external components. With low standby current consumption of less than 0.1uA, the device can be used in battery powered devices.

Conclusion

ADP172ACBZ-1.8-R7 is an integrated circuit sold by Analog Devices, Inc., categorized as PMIC - Voltage Regulators - Linear. Its low drop out linear regulator have low noise and logic controlled shutdown, which can be used in a variety of applications. Its working principle includes an operational amplifier, feedback network, and additional components. With low standby current consumption of less than 0.1uA, the device can be used for battery powered devices.

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