LF120CDT-TR

Current - Output:	500mA
Base Part Number:	LF120
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
Control Features:	--
PSRR:	69dB ~ 54dB (120Hz ~ 10kHz)
Current - Supply (Max):	12mA
Current - Quiescent (Iq):	1.5mA
Series:	--
Voltage Dropout (Max):	0.7V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
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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LF120CDT-TR Application Field and Working Principle
The LF120CDT-TR is a type of Linear Voltage Regulator in the Power Management IC (PMIC Linear Voltage Regulators) category offered by Littelfuse. It is specifically used for low power consumer and industrial applications. The LF120CDT-TR features an internal short circuit current-limiting, over-temperature protection, reverse-battery protection, output overload protection, and serves as a voltage reference for power-on reset circuitry, reset sequencing and timing. This regulator has a wide input voltage range of 4.5V to 20V and output voltage range of 1.23V to 15V. It has an internal thermal shut-down to prevent damage from above-normal operating temperature, and the current-limiting design helps to protect the device from over-current conditions.

Working Principle
The LF120CDT-TR utilizes a linear regulator to maintain an output voltage. It works by taking in an input voltage and comparing it to a reference voltage. A linear regulator compares these two voltages, and via an error amplifier, adjusts the output voltage accordingly. The output voltage is then regulated by an output voltage transistor, ensuring that the output voltage remains constant. The output current is limited internally to protect the device and provide stability. The output voltage range of the LF120CDT-TR is from 1.23V to 15V at a temperature range between -40°C and 125°C.

Applications
The LF120CDT-TR can be used in many low power applications such as handheld electronic devices, medical electronics, power systems, personal computer systems, audio, manufacturing and automotive. It is ideal for applications where a low dropout voltage is necessary, such as microprocessors, radios, and instrumentation, as well as applications requiring a wide input voltage range. As a cost-effective linear regulator, the LF120CDT-TR also helps to reduce the number of discrete components in your design by integrating the regulator, reset and protection circuitry into a single package.

The LF120CDT-TR linear regulator from Littelfuse has been designed for low power consumer and industrial applications such as handheld electronic devices, medical electronics, power systems, personal computer systems, audio, manufacturing and automotive. It has an internal short circuit current-limiting, over-temperature protection, reverse-battery protection and output overload protection, and can be used to reduce the number of discrete components in your design. With a wide input voltage and output voltage range as well as higher temperature ratings, the LF120CDT-TR is the ideal choice for low power applications.

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