LM3478MA/NOPB

Frequency - Switching:	100kHz ~ 1MHz
Base Part Number:	LM3478
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	2.97 V ~ 40 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, SEPIC
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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LM3478MA/NOPB Application Field and Working Principle

PMIC (Power Management ICs) voltage regulators are specially designed ICs used in providing regulated voltage or current levels for various electronic products. DC DC switching controllers are a type of PMICs which are used in controlling the output current or output voltage of an electronic device. The LM3478MA/NOPB is one such type of DC DC switching controller IC which can be used for various applications.The LM3478MA/NOPB is a high frequency DC-to-DC controller that can be used in boost, flyback, and SEPIC configurations. It operates in fixed frequency up to 1.5 MHz and provides high efficiency and low quiescent current. It has an integrated high-side and low-side power MOSFET, which makes it suitable for low-power applications. It also features current-limit protection and temperature-compensated current limit functions.The main application of the LM3478MA/NOPB is in low-voltage, high-efficiency DC-to-DC conversion. The LM3478MA/NOPB regulation and protection features make it suitable for wide input ranges and varying output current applications. It is used for powering a wide range of peripherals such as memory and processor cores on laptops and microcontrollers.The LM3478MA/NOPB includes various protection features such as short-circuit protection, overcurrent protection, and thermal shutdown. It also has a precision voltage reference with a tight voltage tolerance of ±1.% It is available in a SOIC-16 package and is heavily utilized in consumer electronics, medical, industrial and automotive applications.In terms of performance, the LM3478MA/NOPB can provide output voltage up to 6V with a peak efficiency of 95%. The output current can be dynamically adjusted with the aid of an external PWM signal. This makes it suitable for DC-to-DC system designs that require high-performance and low power consumption.The working principle of the LM3478MA/NOPB is simple. It uses a voltage reference to compare the feedback voltage to the output voltage. The output is then adjusted according to the difference between the two. The output voltage can be regulated by either turning the power MOSFET switch on for a fixed duration or--with the aid of a PWM signal--turning it on for a varying duration. It is this control technique that provides the current-limit and temperature-compensated current-limit functions.In summary, the LM3478MA/NOPB is a high-performance DC-to-DC switching regulator with a variety of protection and regulation features. It is suitable for low voltage and high-efficiency DC-to-DC conversion applications. It has a wide input voltage range, tight voltage tolerance, and dynamic current control. The LM3478MA/NOPB is available in a SOIC-16 package, making it an attractive choice for use in consumer electronics, medical, industrial and automotive applications.

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