LT1370IR#TRPBF

Voltage - Output (Min/Fixed):	1.245V
Base Part Number:	LT1370
Supplier Device Package:	D2PAK-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	6A (Switch)
Voltage - Output (Max):	35V (Switch)
Series:	--
Voltage - Input (Max):	30V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Cuk, Flyback, Forward Converter, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT1370IR#TRPBF Application Field and Working Principle

LT1370IR#TRPBF is a three terminal, fixed frequency, pulse-width-modulated (PWM) current-mode switching regulator, one rating of the SWITCHMODETM family of DC/DC switching voltage regulators by Linear Technology. It operates as a step-up, step-down, or inverting regulator with a wide input voltage range. It is capable of producing output currents in excess of 1A and is fully protected with a Power Good voltage monitor, soft start time out and adjustable over-current protection.LT1370IR#TRPBF is intended to be used in applications requiring a regulated output voltage and varying input voltage, such as charging systems, portable devices, laptop adapters, and other switching power supplies. It is also well-suited for distributed power architectures, local setting points and power management systems due to its low cost, low profile and low noise operation.

Application Field

LT1370IR#TRPBF is suitable for use in many different levels of switching regulators and power supplies. It can be used in applications such as distributed power architectures, local setting points, and power management systems. Additionally, it can be used for a variety of other applications such as battery charging systems, portable devices, laptop adapters, and renewable energy inverters.

Working Principle

LT1370IR#TRPBF is a regulated switch-mode power supply (SMPS) circuit. It uses an integrated circuit (IC) whose primary purpose is to provide a regulated output voltage from an unregulated input voltage. It works on the principle of pulse width modulation to convert an input voltage of a varying magnitude and frequency into an output voltage of a fixed magnitude and frequency.The LT1370IR#TRPBF contains two main components: an integrated control circuit and a power switch. The control circuit continuously monitors input and output voltages and adjusts the output in response to changes in both of these. The power switch, which is usually a MOSFET, is activated and deactivated by the control circuit in response to input and output voltage values. When the power switch is activated, it will conduct and the output voltage rises proportional to the input voltage. When the power switch is deactivated, it will cease to conduct and the output voltage will fall. This switching action is done at a constant on-time frequency and the length of time that the power switch is activated is called the duty cycle. The duty cycle is varied in response to changes in input and output voltages.The LT1370IR#TRPBF also contains two other components: a feedback circuitry for output voltage regulation and a current sense resistor for over-current protection. The feedback keeps the output voltage at its set value regardless of any changes in input or load voltage. The current sense resistor senses the current flow through the power switch and activates a shutdown circuit if the current exceeds a predetermined level.In conclusion, LT1370IR#TRPBF is a three terminal, fixed frequency, pulse-width-modulated (PWM) current-mode switching regulator that can be used to provide a regulated output voltage from an unregulated input voltage. It utilizes an integrated control circuit, a power switch, a feedback circuit and a current sense resistor to ensure efficiency and safety while maintaining a constant output voltage.

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