LT3050IDDB#TRMPBF

Current - Output:	100mA
Base Part Number:	LT3050
Supplier Device Package:	12-DFN (3x2)
Package / Case:	12-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Current Limit, Enable, Soft Start
PSRR:	85dB (120Hz)
Current - Supply (Max):	5.2mA
Current - Quiescent (Iq):	90µA
Series:	--
Voltage Dropout (Max):	0.55V @ 100mA
Voltage - Output (Max):	44.5V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Input (Max):	45V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Linear voltage regulator is a kind of chip used in electronic circuits. It acts as an electronic component by maintaining a constant voltage, providing a steady and reliable voltage supply for devices. LT3050IDDB#TRMPBF is a linear voltage regulator which is dedicated for switching power supply applications.

Description

The LT3050IDDB#TRMPBF is an input feedback error amplifier with a wide input range, adjustable output voltage and low quiescent current. It has an input voltage range of 3V to 40V, making it suitable for 12V and 24V nominal input applications. The maximum output current level is 150mA, with a gain of 25V/V. The quiescent current of this chip is 1μA typical and the switching frequency can be adjusted between 150kHz and 500kHz. It also has an power-on reset (POR) circuit and outputs a regulated voltage that is independent to the switching frequency.

Application

The LT3050IDDB#TRMPBF has various applications in the field of switching power supply. It can be used in automotive applications such as electric power steering and infotainment systems, and medical applications like blood pressure meters and pulse oximeters, due to its wide input voltage range. It is also used in industrial power supply, mobile phone charger and battery charging systems.

Working Principle

The LT3050IDDB#TRMPBF regulator works by using a feedback loop circuit to maintain a fixed output voltage. It works by comparing the input voltage (Vin) and the output voltage (Vout) and then adjusting the amount of current, also known as duty cycle, flowing through the switch to maintain a constant output voltage. The feedback loop circuit comprises of a pair of resistors, R1 and R2, and an error amplifier, which amplifies the difference between the two voltages. The duty cycle can be adjusted by changing the value of the feedback resistors. The error amplifier controls the switching frequency of the switching power supply. When the input voltage is lower than the output voltage, the error amplifier prepares a duty cycle, thus turning the switch on. When the input voltage is higher than the output voltage, the error amplifier stops the duty cycle, thus turning the switch off. This is known as the Pulse Width Modulation (PWM) control of the switching power supply.

Protection Features

The LT3050IDDB#TRMPBF provides protection features such as over current protection, over voltage protection and thermal protection. The over current protection feature helps to prevent the chip from damage caused by excessive current flow during heavy load switching. The over voltage protection feature prevents the chip from damage caused by excessive input voltage. And the thermal protection feature helps to protect the chip from excessive temperature, allowing the chip to work under extreme conditions.In conclusion, the LT3050IDDB#TRMPBF is a linear voltage regulator dedicated for switching power supply applications. It has a wide input voltage range, controllable output voltage and various protection features. It is widely used in various application fields such as automotive, medical and industrial power supplies.

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