LD1085V12

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:	66dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.5V @ 3A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction

LD1085V12 is an adjustable voltage regulator designed to provide a linear voltage regulation with a wide input and output voltage range. It is part of a family of ultra-low power, high performance, and low noise linear voltage regulator products, which are specifically designed for low power consumption applications such as mobile phones, digital cameras, PDAs, etc. Compared with other voltage regulators, the LD1085V12 has very low quiescent current and is capable of supplying ±2% in output voltage regulation.

Application Field

LD1085V12 is ideal for applications requiring low power dissipation, high efficiency, and wide input and output voltage. It is suitable to be used as a standby power source for mobile phone and laptop, stabilizing the voltage level during operation in order to preserve system integrity. It comes with very low quiescent current, which makes it an ideal choice for portable devices with low power consumption. In addition, LD1085V12 supports adjustable and fixed output voltage, which makes it extremely flexible for system design, and offers a stable voltage regulation even with an output current up to 500mA.Aside from its use in mobile phones and laptops, LD1085V12 can also be used in many other applications such as automotive electronics, hard disk drives, servers, low power audio amplifiers, GPS, and many other consumer electronic products. Furthermore, LD1085V12 is designed with a wide operating temperature range ranging from -40°C to +125°C, so it is suitable to be used in harsh environment as well.

Working Principle

LD1085V12 utilizes pulse-width modulation (PWM) control to regulate the output voltage from the input voltage source. This PWM control is based on a high performance error amplifier which is connected to an internal reference voltage of 1V. The reference voltage is compared to the output voltage and the internal loop keeps adjusting its duty cycle to keep the output voltage at the same level.In addition, the LD1085V12 also comes with an enable pin which can be used to shut down the regulator when it is not needed. When this pin is at 0V, the LD1085V12 will enter the shutdown mode, reducing the power dissipation of the entire system.

Conclusion

The LD1085V12 is an attractive choice of voltage regulator due to its many advantages over other regulators. It has very low quiescent current, wide input and output voltage range, excellent output regulation, and adjustable and fixed output voltage. Furthermore, it can be used in many applications ranging from mobile phones to automotive electronics. Its enable pin is also useful for reducing power dissipation when the device is not needed. All these make LD1085V12 an ideal choice for designing low power consumption system.

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