LP2951ACM-3.0

Current - Output:	100mA
Base Part Number:	LP2951
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	--
Current - Supply (Max):	14mA
Current - Quiescent (Iq):	120µA
Series:	--
Voltage Dropout (Max):	0.6V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Adjustable (Fixed)
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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LP2951ACM-3.0 Application Field and Working PrincipleThe LP2951ACM-3.0 is a low-voltage, precision, low-power, low-dropout linear voltage regulator used for applications such as telecommunications, laptop computers, notebook computers, PDA’s, server power supplies, and other equipment requiring low voltage regulation.The LP2951ACM-3.0 features an adjustable (1.24V to 3.30V) output voltage, tight output voltage accuracy of ±2% over line and load conditions, low quiescent current (14mA at full load) and low dropout voltage (0.5V @ 100mA). The LP2951ACM-3.0 also offers excellent noise rejection and line regulation (0.05%/V) over a wide input voltage range (1.8V to 5.5V). The device is available in the tiny 5-pin SOT-23-5 package for low profile and higher density board applications.MechanismThe LP2951ACM-3.0 is a low-dropout (LDO) liner voltage regulator. The device produces a regulated output voltage of 1.24-3.30V, adjustable by varying the external resistor, connected between the ADJ and GND pins. The output voltage is regulated by adjusting the internal NPN-transistor towards a reference. During operation, the voltage on the ADJ pin is compared to the reference voltage and the internal transistor drives the output, adjusting it until the ADJ voltage is equal to the reference.The device needs a minimum operating current of 10µA (typical) independent of the output voltage. This makes the LP2951ACM-3.0 suitable for battery operated applications. The LP2951ACM-3.0 is designed so that the output current can be increased or decreased, while still providing the required output voltage. This adjustable current limiting feature allows the user to customize the device output voltage in order to optimize power efficiency and/or maximize output power when used in battery operated systems.ProtectionThe LP2951ACM-3.0 has a number of protection features to ensure safe operation. The device is equipped with thermal protection to protect against overheating by limiting the output current if the temperature exceeds the maximum rating. In addition, the device has an over-current protection circuit that limits the output current in case of a short circuit. The over-voltage protection circuit is used to protect the device from excessive output voltage and provide a safe operation.Features and BenefitsThe LP2951ACM-3.0 is a low voltage, precision, low power, low dropout linear voltage regulator, used in applications such as telecommunications, laptop computers, notebook computers, PDA’s, server power supplies, and other equipment requiring low voltage regulation. The LP2951ACM-3.0 has an adjustable 1.24V to 3.30V output voltage, tight output voltage accuracy of ±2% over line and load conditions, low quiescent current (14mA at full load) and low dropout voltage (0.5V @ 100mA). In addition, the device has an adjustable current limiting feature that allows the user to customize the device output voltage in order to achieve optimum power efficiency and/or maximize output power. The device also offers excellent noise rejection and line regulation (0.05%/V) over a wide input voltage range (1.8V to 5.5V). The protection features provides safe operation, while the small 5-pin SOT-23-5 package provides low profile and higher density board applications.

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