LA5774-E

Voltage - Output (Min/Fixed):	1.26V
Base Part Number:	LA5774
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	160kHz
Current - Output:	3.1A (Switch)
Voltage - Output (Max):	28V
Series:	--
Voltage - Input (Max):	28V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LA5774-E Application Field and Working Principle

The LA5774-E is a high-performance DC/DC switching regulator from Panasonic and belongs to a class of PMIC (Power Management Integrated Circuit) Voltage Regulators, specifically the DC/DC Switching Regulators. As one of the most reliable and efficient switching regulators on the market, the LA5774-E is gaining widespread popularity in applications that require high-performance and efficient power supplies. In this article, we will look at the application field and working principle of the LA5774-E DC/DC switching regulator.The LA5774-E is a high-voltage, high-current, low-dissipation DC/DC switching regulator optimized for high-current applications, such as data centers, server farms, and other industries that require reliable and efficient power supplies. It can provide power up to 60V and can provide up to 10A of current. It has a maximum duty cycle of 65%, and its switching frequency ranges from 300kHz to 1MHz. The device also has a wide input voltage range from 9V to 60V.The working principle of the LA5774-E is based on the PWM (Pulse Width Modulation) technique, which is used for regulating the output voltage to a desired level. The PWM technique works by generating a pulse-width modulated signal with a duty cycle that is proportional to the input voltage. The duty cycle is then used to control the output voltage of the LA5774-E device. The LA5774-E uses a combination of a voltage-regulating loop and a switching transistors to achieve the precise voltage control.First, a voltage regulating loop is used to compare the output voltage with an internal reference voltage. This comparison results in an error voltage which is then amplified by a low-power transistor. A negative feedback loop is used to ensure that the output voltage stays within the predetermined limits. The error voltage is then used to adjust the conduction period (and thus the duty cycle) of the switching transistor according to feedback control.By adjusting the duty cycle of the switching transistor, the output voltage can be regulated. The output voltage of the switching regulator is then smoothed and filtered from the output of the switching transistors. This smoothing and filtering process eliminates the switching noise that is generated by the switching transistors.The LA5774-E is the perfect choice for applications that require high current and precise voltage control and regulation. Its wide input voltage range and adjustable duty cycle make it a reliable and efficient power source for a variety of applications. Additionally, its PWM based control method gives it the ability to maintain precise voltage levels regardless of variations in the input voltage. With these features, the LA5774-E is an ideal choice for large data centers, server farms, and other industries that require efficient and reliable power supplies.

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