LD1085CDT-R Integrated Circuits (ICs)

Current - Output:	3A
Base Part Number:	LD1085
Supplier Device Package:	DPAK
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	75dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.5V @ 3A
Voltage - Output (Max):	28.5V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LD1085CDT-R application field and working principle

LD1085CDT-R is a Fixed Output Low Dropout (LDO) one-channel voltage regulator, from the family of PMIC - Voltage Regulators - Linear. It offers an efficient way to provide a stabilized output voltage from a limited input voltage range, thanks to its low-dropout voltage characteristics and circuit design.

Application

LD1085CDT-R is typically used as a power source for low power systems, ranging from small consumer devices like digital cameras, PDAs and portable audio players, to larger embedded systems with multiple power supplies. It is also used to power devices that require a steady output voltage, such as embedded microcontrollers and digital signal processors.

Commercial and Industrial Applications

Due to its low dropout characteristics and high reliability, the LD1085CDT-R is also used in commercial and industrial applications. In commercial applications, it can be used to provide stable power supply in products such as point-of-sale (POS) terminals and electronic devices like LCD displays, cash registers and payment terminals. In the industrial sector, LD1085CDT-R is frequently used in automation, energy and telecommunication systems, enabling them to operate reliably in various conditions.

Features and Benefits

The LD1085CDT-R linear voltage regulator includes several features that make it attractive for various applications. It has a low quiescent current which makes it suitable for battery-powered systems. Its wide input voltage range allows it to operate between 2.5V to 15V, and its flexible design enables it to be customized in a variety of ways. It is also capable of providing up to an output current of 1.3A continuous, with a maximum output voltage of 5V.

Design Considerations

When evaluating and selecting a power regulator, designers should consider several key factors, such as output current capacity, input and output voltage ranges, dropout voltage, quiescent current, temperature range, efficiency, and package size. The LD1085CDT-R has good performance in all of these areas, making it an ideal choice for low-power applications.

Working Principle

The working principle of the LD1085CDT-R linear voltage regulator is based on the well-known process of "feedback control". The regulator includes an error amplifier whose output is compared to a reference voltage. If the output voltage is too low, the error amplifier increases the base current of the pass transistor, in order to increase the load current. If the output voltage is too high, the error amplifier decreases the base current of the pass transistor, in order to decrease the load current. The error amplifier thus operates to keep the output voltage at a constant value by adjusting the pass transistor\'s base current. This process is repeated continuously, and the output voltage is kept constant regardless of the input voltage, load current, or temperature.

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