LT1761ES5-2#TRPBF

Voltage Dropout (Max):	0.45V @ 100mA
Base Part Number:	LT1761
Supplier Device Package:	TSOT-23-5
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	65dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT1761ES5-2#TRPBF Application Field and Working Principle

LT1761ES5-2#TRPBF is a current mode step-down switching regulator in the form of a 5-lead, thermally enhanced, plastic Power package. This regulator is made by Linear Technology Corporation, a major semiconductor company based in Milpitas, California.The LT1761ES5-2#TRPBF is designed for applications like portable computers, cellular telephones, calculators, battery-powered systems and other systems with low noise and high efficiency demands. It operates a wide input voltage range from 1.2V to 35V and offers an adjustable output from 0.765V to 30V, which can be set with two external resistors. The device is capable of delivering output currents from 50 mA to 600 mA.The LT1761ES5-2#TRPBF provides several features for enhanced system performance. It has adjustable switching frequency from 200KHz to 2MHz and precision reference voltage of 1.223V and ±0.5% accuracy. It also offers shutdown pin that reduces the quiescent current to 1µA and a synchronizable operating frequency with external clock input.The LT1761ES5-2#TRPBF regulator has a current mode peak-current-bandwidth (PCB) architecture with high efficiency at full load. It also uses a minimum number of external components and features programmable switching frequency and soft-start. Additionally, the device features a power Good indicator, which indicates when the output is within ±6% of its set voltage.The LT1761ES5-2#TRPBF works by converting an input voltage higher than the output voltage into a fixed output voltage. This process begins with a switching regulator controlling the amount of input voltage needed to be converted into the output voltage. The switching regulator accepts the input voltage, which is filtered by an input capacitance and passed through an inductor. This inductor creates a converter that determines a set magnitude or frequency (depending on the input voltage) for a certain amount of output voltage.The output voltage is then determined by a programmable reference voltage, which is adjusted by two external resistors. Finally, the output voltage is then sent to the load in a regulated manner.In conclusion, the LT1761ES5-2#TRPBF is an adjustable, low-noise current mode step-down switching regulator with programmable frequency and synchronizable operating frequency with external clock input. It is designed for use in portable computers, cellular telephones, calculators, battery-powered systems, and other systems with low noise and high efficiency demands. Its peak-current-bandwidth architecture ensures efficient operation at full load, and its adjustable switching frequency from 200KHz to 2MHz provides increased flexibility. Finally, the device’s Power Good indicator provides an efficient way to monitor the output of the regulator.

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