L4949ED-E

Current - Output:	100mA
Base Part Number:	L4949
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	Reset
PSRR:	--
Current - Supply (Max):	5mA
Current - Quiescent (Iq):	300µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	0.5V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	28V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Tube

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L4949ED-E Application Field and Working Principle

PMIC: Voltage Regulators - Linear

The L4949ED-E is a low-dropout (LDO) voltage regulator designed to work with a variety of input/output voltages. Developed by STMicroelectronics, this regulator is designed for low power and low noise applications. It works in a wide range of voltage requirements from 2.2 V to 6.0 V and is rated for a maximum current of up to 500 mA. The L4949ED-E was designed for a variety of applications, including consumer electronics, desktop computers, automotive, industrial and medical devices, power management and telecommunications. More specifically, it can be used in a variety of areas, such as: audio/visual, embedded systems, automotive/transport, consumer electronics, consumer appliances, computer/peripheral, handheld devices, industrial, medical equipment, telecom and telecom infrastructure.This regulator was designed to work within a "droop" range - the input voltage must be higher than the output voltage by a predetermined amount (a droop), or the L4949ED-E will be unable to provide the desired voltage output. The output voltage can be adjusted to provide a range of different output voltages, making it ideal for a variety of applications.The L4949ED-E also features a fast transient response and a thermal shutdown protection feature, which helps protect from overheating and/or overloading. By preventing overheating, this device helps ensure that the output voltage remains constant (and does not decrease due to overloading).In terms of its working principle, the L4949ED-E has an on-chip regulator, using a proprietary power and bias management algorithm. The integrated regulator is designed to minimize power dissipation, keeping the unit cool while providing reliable performance. The L4949ED-E contains a high-performance voltage detector coupled with an error amplifier and adjustable voltage range resistors. This detector detects the input voltage and adjusts the internal voltage to achieve the required output. The resistors adjust the range of output voltages, enabling the regulator to operate in a wide range of voltages. The built-in error amplifier helps to ensure stability. The L4949ED-E also contains a power-good indicator that displays the actual output voltage. This indicator is useful in helping the user to determine if the regulator is working correctly. The integrated enable/disable pin allows for manual enable/disable functions, making the use of this device even more convenient.The L4949ED-E also features low noise operation, which makes it suitable for sensitive applications. This device is also designed for efficient operation and low quiescent current, making it a great choice for portable and low power applications. Overall, STMicroelectronics\' L4949ED-E is a reliable and effective low-dropout voltage regulator designed to work with a variety of input/output voltages. Its wide range of applications, fast transient response, thermal shutdown protection and low noise operation, make the device an excellent choice for a wide variety of applications.

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