LT1764AET#31PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Output Configuration:	Positive
Output Type:	Adjustable
Number of Regulators:	1
Voltage - Input (Max):	20V
Voltage - Output (Min/Fixed):	1.21V
Voltage - Output (Max):	20V
Voltage Dropout (Max):	0.66V @ 3A
Current - Output:	3A
Current - Quiescent (Iq):	1.5mA
Current - Supply (Max):	200mA
PSRR:	63dB (120Hz)
Control Features:	Enable
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-220-5 Formed Leads
Supplier Device Package:	TO-220-5 Flow 31
Base Part Number:	LT1764

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Introduction to the LT1764AET#31PBF

The LT1764AET#31PBF is an adjustable precision low dropout linear regulator from the LT1764 series of power management integrated circuits (PMICs). It is available in the MSOP-10 package from Linear Technology, and is a linear voltage regulator, specifically a precision low dropout regulator.

Applications of the LT1764AET#31PBF

The LT1764AET#31PBF is a voltage regulator suitable for many different applications. It is designed for use in applications requiring accurate low dropout voltage regulation, such as in high power, sensitive electronic systems. The device can be used in a wide range of battery operated systems including laptops, PDAs, mobile phones, and digital cameras. The device is also suitable for derived supply systems with high ripple rejection and fast response times.

Features of the LT1764AET#31PBF

The LT1764AET#31PBF features an output voltage range of 0.88V to 13V, and an adjustable input voltage range from 2V to 16V. The device also has a low output noise of 200μV, ripple rejection of 85dB, output current limit of 0.5A, and thermal shutdown at 160°C. It has low quiescent current drawing (5μA) and is SOT-23 compatible.

Working Principle of the LT1764AET#31PBF

The LT1764AET#31PBF is a low dropout voltage regulator, which means that it has the ability to reduce the power consumed from the input source. The input voltage is compared to an internal reference voltage and the error voltage is used to control the following series of transistors that makes up the linear regulator.The device has an on-chip error amplifier, which sets the output voltage, and a P-type pass transistor in series between the input voltage and the output voltage. The P-type pass transistor acts as a voltage follower; it receives its voltage from the output of the error amplifier, which reduces the output voltage from the input voltage by a predetermined amount according to the equation:Vout = Vin-k (Vout-Vref)Where k is an adjustment coefficient, Vout is the output voltage, and Vref is the reference voltage. At low input voltages, the voltage drop is reduced, resulting in lower power consumed from the input source. This is the low dropout effect that the LT1764AET#31PBF provides. The LT1764AET#31PBF also features a host of protection features, including short-circuit, thermal shutdown, and over voltage protection. These features protect the device and the downstream components in case of abnormal or over voltage input or output conditions.

Conclusion

The LT1764AET#31PBF is an adjustable precision low dropout linear regulator from the LT1764 series of power management integrated circuits. It is suitable for use in high power and sensitive electronics systems, as well being suitable for derived supply systems. It has an output voltage range of 0.88V-13V and an adjustable input voltage range of 2V-16V, and low quiescent current of 5uA. The device also features a host of protection features, and can be used in a wide range of battery operated systems. The LT1764AET#31PBF operates on the principle of low dropout voltage regulation, and is an ideal solution for voltage regulation and power management application.

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