ADP221ACBZ2828-R7

Current - Output:	200mA, 200mA
Base Part Number:	ADP221
Supplier Device Package:	6-WLCSP (1.45x0.95)
Package / Case:	6-WFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	68dB ~ 40dB (100Hz ~ 1MHz), 68dB ~ 40dB (100Hz ~ 1MHz)
Current - Supply (Max):	220µA
Current - Quiescent (Iq):	120µA
Series:	--
Voltage Dropout (Max):	0.23V @ 200mA, 0.23V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V, 2.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	2
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

ADP221ACBZ2828-R7 is a Linear Voltage Regulator (LVR). This LVR is from Analog Device\'s Power Management Integrated Circuits (PMIC) family of products. It provides regulated voltages specifically designed for automotive applications. The ADP221ACBZ2828-R7 is a 3.3 V low-dropout (LDO) regulator that provides a regulated voltage within a ±1.5 % accuracy over temperature.

Application field and working principle

ADP221ACBZ2828-R7 is a low dropout linear voltage regulator with a wide temperature range operational and a low quiescent current of 28 uA. It is designed to deliver up to 150 mA of regulated current with a very low output noise and a low input-output voltage difference of just 100 mV at the maximum load. This makes the ADP221ACBZ2828-R7 an ideal solution for automotive applications where regulators are typically required to deliver high current from a single battery line, while maintaining a low standby current and a wide input voltage range.The LVR utilises a system of three feedback loops – an overall error amplifier/regulator loop, a current-limiting loop, and an ambient temperature compensation loop. The overall system relies on a voltage reference generated by a Zener diode, which:* comparisons the voltage output of the LVR to the reference voltage generated by the Zener diode and;* adjusts the gate voltage of the pass transistor (MOSFET) in order to maintain the output voltage setpointThe current-limiting loop works to adjust the magnitude of the pass transistor’s gate voltage in order to ensure that the ADP221ACBZ2828-R7 maintains a low output resistance and a very predictable load regulation. This is done to protect the device from damage should a short circuit occur during operation.Finally, the ADP221ACBZ2828-R7 also features an ambient temperature compensation loop which allows it to regulate the output voltage across a wide range* of conditions. This is done by using an external temperature sensor and an additional compensation resistor to adjust the output voltage.

Conclusion

The ADP221ACBZ2828-R7 Linear Voltage Regulator is an ideal solution for automotive applications where reliable and efficient regulation is required. It utilises a system of three feedback loops to adjust its output voltage to match the input voltage, limit the current output, and compensate for ambient temperature changes. The LVR\'s low-dropout properties, wide temperature range operation, and low quiescent current also makes it attractive for use in multiple battery-powered applications.

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