L4940V12

Current - Output:	1.5A
Base Part Number:	L4940
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C
Protection Features:	Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	61dB (120Hz)
Current - Supply (Max):	50mA
Current - Quiescent (Iq):	8mA
Series:	--
Voltage Dropout (Max):	0.9V @ 1.5A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	17V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The L4940V12 is a linear voltage regulator designed by STMicroelectronics. It is a 3-pin, adjustable, low-dropout (LDO) regulator with a wide input voltage range of 1.5 to 6 V and a low dropout of only 0.35 V per output voltage step. This makes it perfect for a variety of low-power applications, such as providing power to microcontrollers, FPGAs, digital signal processors, and memory devices. The L4940V12 is available in two options: the “L4940V12” and the “L4940V12A.” The former is a fixed voltage regulator, with a single output voltage of 5 V, while the latter is adjustable, with an output voltage range of 1.8 to 4.85 V. With a supply current of only 2.4 mA and a low dropout voltage of only 0.2 V, the L4940V12 is well-suited for powering low-power circuits. The built-in protection features keep your circuit safe and sound, with current and thermal protection. Additionally, it features low output noise, low temperature drift, and fast transient response. The L4940V12 can be used in a variety of applications, including handheld medical devices, consumer electronics, and embedded systems. It is a perfect choice for powering gate arrays, microcontrollers, LED lighting, memory chips, ASICs, and more.The working principle of the L4940V12 is simple. The input voltage is applied to the base of an NPN bipolar transistor, which is connected to the output via a series pass regulator. The input current is amplified by the transistor and current-limited by the series resistor. This causes a voltage drop across the output resistor, which sets the output voltage of the regulator. As load current changes, the output voltage is adjusted to keep the load supplied with the correct voltage. The L4940V12 also features a power saving standby mode. When the output voltage is below the set threshold, the regulator shuts off the circuit and stops drawing power. This protects the circuit from unnecessary power consumption when it’s not needed. When the output voltage is increased, the circuit is automatically enabled again. The L4940V12 offers a variety of features that make it the perfect choice for low power applications. With its wide input voltage range, low dropout voltage, current and thermal protection, low noise, and fast transient response, it is one of the most versatile voltage regulators available. Combined with its small size and lightweight package, it’s easy to see why the L4940V12 is a popular choice for embedded applications.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description