LM2937ES-15

Current - Output:	500mA
Base Part Number:	LM2937
Supplier Device Package:	DDPAK/TO-263-3
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	--
Current - Supply (Max):	20mA
Current - Quiescent (Iq):	2mA
Series:	--
Voltage Dropout (Max):	1V @ 50mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	15V
Voltage - Input (Max):	26V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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LM2937ES-15 Application Field and Working Principle

PMIC (Power Management Integrated Circuits) devices are essential for electronic designs and widely used in consumer, communications, computing, industrial, and automotive applications. They are used to convert, regulate, control, and distribute power. Voltage regulators are the most widely used PMIC devices. They ensure that a voltage level is accurate and consistent, by either increasing or decreasing the supply voltage. Among the various types of voltage regulators, linear regulators are the most commonly used.The LM2937ES-15 is a step-down voltage regulator with an active-dropout scheme suitable for a wide range of applications. Its use as a switch-mode power supply, combined with the high input voltage and high output current capabilities, makes this regulator an ideal choice in many applications.The LM2937ES-15 is an adjustable voltage regulator capable of providing an output voltage of 1.2 V to 33.3 V and an output current of up to 15 A. The device\'s high efficiency and low noise operation make it suitable for use in noise-sensitive applications. To ensure accuracy, the output voltage is trimmed to within ±2% max. The LM2937ES-15 also provides short circuit and overtemperature protection to ensure a reliable and safe operation.The LM2937ES-15 consumes very low power and operates over an extended temperature range of -40°C to +125°C. The device is offered in an adjustable case with exposed thermal pad, eliminating the need for a heatsink. The device also provides excellent load and line regulation, as well as an integrated current-limited circuit to protect against accidental overloads.The main working principle of the LM2937ES-15 is that its output voltage is maintained regardless of load current, input voltage, and ambient temperature. This is achieved by using a series of voltage-based feedback mechanisms and a current-sensing resistor. The device responds to changes in the input voltage or load current by adjusting its transconductance and output power level.The LM2937ES-15 has its own built-in current limitation circuitry, which reduces its power consumption and protects the device from accidental overloads. When the device is used as a switching power supply, the output current is limited by its internal current-limiting circuit. The current-limit level is programmable, depending on the specific application.The LM2937ES-15 also has a soft start circuit, which limits the inrush current and helps ensure smooth start-up. It also minimizes output voltage over-regulation during light load conditions. This feature further improves the overall efficiency of the device and keeps power consumption low.In summary, the LM2937ES-15 is an adjustable voltage regulator sharing features like voltage accuracy, current limiter, and thermal protection. Its wide input and output voltage range, excellent load regulation, and low noise performance make it an ideal choice for many applications. The device\'s ability to supply a high current with low power consumption and extended temperature ratings make it a good choice for automotive and other demanding applications.

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