LT1963AMPQ#PBF

Current - Output:	1.5A
Base Part Number:	LT1963
Supplier Device Package:	5-DDPAK
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	63dB (120Hz)
Current - Supply (Max):	120mA
Current - Quiescent (Iq):	1.5mA
Series:	--
Voltage Dropout (Max):	0.55V @ 1.5A
Voltage - Output (Max):	20V
Voltage - Output (Min/Fixed):	1.21V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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LT1963AMPQ#PBF Application Field and Working Principle

LT1963AMPQ#PBF is a 2.5A, low dropout, ultra-low noise linear regulator, which features a wide input voltage range and low output noise. It also has high PSRR and low quiescent current, making it ideal for use in sensitive applications, especially in mobile devices. This article will discuss the applicationfield and working principle ofLT1963AMPQ#PBF.

Application Field

LT1963AMPQ#PBF is most commonly used in personal computers, mobile phones, and hand-held devices. It is preferred for these devices due to its low quiescent current and high PSRR performance. This ensures that the voltage regulator is able to maintain stability and accuracy, even in the presence of noisy and fluctuating power conditions. It is also suitable for automotive and industrial applications, especially with its wide input voltage range and low output noise.

Working Principle

LT1963AMPQ#PBF is a low dropout, ultra-low noise linear regulator that works based on the principle of linear regulation. It consists of an error amplifier, a reference voltage, an internal pass transistor, and an output stage. To understand its working principle, let us consider a typical application circuit. In this circuit, the input voltage is applied to the regulator through filter capacitors, and the feedback voltage is taken from the output of the external load.The error amplifier monitors the input voltage and the feedback voltage and compares them to a reference voltage. If the two are not equal, an error signal is generated and sent to the internal pass transistor. The pass transistor then amplifies the error signal and regulates the output voltage by controlling the current to the load. Finally, the output stage takes the regulated voltage and passes it out of the regulator.The output voltage regulation is based on the error amplifier voltage and the reference voltage. These two control the amplitude of the error signal, which determines the output voltage. The output voltage is then compensated with external components as necessary to ensure that it remains stable and accurate.In sum, LT1963AMPQ#PBF is an ideal device for use in sensitive applications, especially in mobile devices. It features a wide input voltage range, low output noise, high PSRR, and low quiescent current, making it a great choice for various applications. Its working principle is based on the principle of linear regulation, in which the output voltage is regulated by an error amplifier, a reference voltage, an internal pass transistor, and an output stage.

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