LD2981ABM25TR

Current - Output:	100mA
Base Part Number:	LD2981AB
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	63dB (1kHz)
Current - Supply (Max):	2.6mA
Current - Quiescent (Iq):	150µA
Series:	--
Voltage Dropout (Max):	0.375V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LD2981ABM25TR Application Field and Working Principle

LD2981ABM25TR is an adjustable linear voltage regulator of the PMIC series - Voltage Regulators - Linear. Its purpose is to regulate voltage by maintaining a stable output voltage over a range of capability levels and load conditions. In order to understand its working principle, it is necessary to understand what it does and its key features.The LD2981ABM25TR is a voltage-regulated linear voltage regulator which is housed in a small SO-8 package. It has a wide input voltage range up to 25-V, allowing it to maintain a stable supply voltage while dealing with varying input voltage levels and load requirements. Its output voltage is adjustable between 1.25V and 14V, making it well suited for low-power, low-voltage applications. Additionally, the LD2981ABM25TR offers low noise performance, which is ideal for applications requiring accuracy and vibrancy, like signal conditioning and test equipment.To understand the LD2981ABM25TR’s working principle, it is important to understand the underlying components and their operation. The voltage regulator is composed of three main components: a voltage reference (VREF), an error amplifier, and an internal power transistor. The VREF is used to set the output voltage, while the error amplifier is used to compare the voltage being supplied to the amount being requested by the load. Depending on the difference, it will then adjust the duty cycle of the internal power transistor, thus regulating the output voltage.The LD2981ABM25TR is primarily used in applications requiring low input voltage, low power applications, as well as applications requiring high accuracy and vibrancy. To list a few, it is widely used in the cellular base-stations, battery charger applications, and various instrumentation or measurement devices. It is also often used in low voltage operations, such as powering CPUs, RAM, and other components in a computer system.In conclusion, the LD2981ABM25TR is a versatile and adjustable linear voltage regulator of the PMIC series. Its wide input voltage range, adjustable output voltage, and low noise performance make it suitable for a wide variety of applications including battery charger, computer system, and low-power applications. It operates by maintaining a stable output voltage over a range of capability levels and load conditions, utilizing a voltage reference, error amplifier, and an internal power transistor to compare and adjust the duty cycle.

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