LDF33DT-TR

Current - Output:	1A
Base Part Number:	LDF33
Supplier Device Package:	DPAK
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Control Features:	Enable, Power Good
PSRR:	60dB ~ 45dB (120Hz ~ 100kHz)
Current - Quiescent (Iq):	800µA
Series:	--
Voltage Dropout (Max):	0.5V @ 1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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IntroductionThe LDF33DT-TR is an integrated medium voltage linear regulator and controller, an ideal choice for voltage regulator applications requiring precision accuracy and exceptional temperature stability. It offers unsurpassed flexibility and performance for medium voltage applications with a wide input voltage range of 4.5 V to 24 V and output voltage up to 20 V. The LDF33DT-TR provides complete protection for applications that require extreme temperatures, high-intensity currents and high EMI levels, making it suitable for aerospace, automotive and industrial applications.Application FieldThe LDF33DT-TR is a high-performance linear regulator and controller suitable for medium-voltage applications ranging from 4.5 V to 24 V. It is particularly suitable for driving high-voltage motors, including power management applications in automotive, aerospace and industrial applications. This can be used to supply a wide range of loads, such as stepper motors, dc motors, alternators, AC motors and DC-DC converters. Additionally, the LDF33DT-TR includes built-in features such as internal thermal protection, programmable overvoltage protection, programmable soft start and others, which make it also suitable for applications in harsh environments, where protection from high temperatures, currents and EMI may be needed.Working PrincipleThe LDF33DT-TR is an integrated linear voltage regulator and controller. It employs a voltage-mode control topology, which means that the output voltage is directly monitored and adjusted whenever necessary. The device is made up of two main parts: the voltage regulators and the built-in control logic. The voltage regulators are responsible for providing the precise output voltage by adjusting the power supply-load , while the built-in control logic ensures precise and precise regulation.The LDF33DT-TR utilizes a pulse width modulation (PWM) technique to adjust the output voltage. This is done by comparing the output voltage with a predetermined reference voltage and modulating the output voltage by varying the duty cycle of the pulse width. The control logic also regulates the current flow and adjusts the output voltage to its set point automatically by adjusting the PWM duty cycle when necessary. Additionally, the device includes features such as under-voltage lockout, over-voltage protection, thermal overload protection and automatic shut down, which make it very reliable.ConclusionThe LDF33DT-TR is a high performance linear voltage regulator and controller. Its wide input voltage range of 4.5 V to 24 V and output voltage range up to 20 V makes it an ideal choice for medium voltage applications. It is further equipped with outstanding features such as internal thermal protection, programmable overvoltage protection, programmable soft start, and others. The LDF33DT-TR is particularly suitable for applications in harsh environments, where additional protection from high temperatures, currents and EMI may be needed.

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