LD1085V18

Current - Output:	3A
Base Part Number:	LD1085
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	72dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.5V @ 3A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The LD1085V18 is a linear voltage regulator, an advanced power management integrated circuit (PMIC) from Alphamosatek. LD 1085V18 is especially designed for battery-powered applications, providing a regulated 5V output for devices with low quiescent current and high power efficiency.

Application Field

The LD1085V18 is used as a linear voltage regulator in applications requiring a regulated 5V DC output. It is especially suitable for battery-powered applications such as low-power communication devices, wearable electronics, smart home appliances, and other portable devices. Due to its high efficiency, it is ideal for applications with a power output level of up to 2A.

Working Principle

The LD1085V18 uses an integrated low dropout (LDO) linear regulator circuit to provide a constant current to the output pin. The input voltage is controlled by an internal voltage divider network, which maintains a stable output voltage regardless of the input voltage changes.To ensure the accurate voltage, the LD1085V18 uses a low temperature coefficient and low-noise voltage reference, which is immune to noise and maintains stable output voltage over a wide temperature range.The power control of the device is also implemented by an independent power control circuit, which monitors and drops off the output voltage when the output current reaches a specific current level. The LD1085V18 also includes a voltage supervisor circuit which constantly monitors and adjusts the output voltage, ensuring that the connected device is always being supplied with a constant voltage for stable operation.Able to operate in a temperature range of -40°C to 85°C, the LD1085V18 ensures complete protection from overvoltage, overcurrent and overtemperature.

Conclusion

The LD1085V18 is an advanced PMIC designed for battery-powered applications. It provides stable 5V output voltage with high efficiency and low power consumption, through its integrated low dropout linear voltage regulator. The voltage supervisor circuit offers protection from overvoltage and overcurrent, as well as ensuring device stability specified by the manufacturer. All of these protect the device from operational failure and maximize the device’s battery life.

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