LT1431MJ8

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	LT1431
Supplier Device Package:	8-CERDIP
Package / Case:	8-CDIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 125°C (TA)
Current - Cathode:	1mA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	50ppm/°C Typical
Tolerance:	±0.4%
Current - Output:	100mA
Voltage - Output (Max):	36V
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The LT1431MJ8 is a single-channel power management integrated circuit (PMIC) from Texas Instruments, designed to control voltage levels within an electrical system. It is typically used in automotive applications and can serve both as a voltage reference and a step-down converter. This device works in conjunction with other components to provide a stable and regulated power supply.

Application Field

On-board automotive electrical systems require accurate and reliable power management components to ensure that the system is functioning as intended and operating safely. The LT1431MJ8 is designed to be used as a voltage reference and step-down converter in these types of systems, providing a steady and reliable power supply.The LT1431MJ8 is well-suited for the automotive industry due to its robust and reliable performance characteristics. It can handle a wide range of input voltages, from 4V to 26V, making it suitable for a variety of applications. It can also provide an output current of up to 3A, which is ideal for powering electronic components and/or sensors within automotive systems.

Working Principle

The LT1431MJ8 operates as both a voltage reference and step-down converter. It features a number of protection features which ensure that the device is protected from over-current, over-voltage, and under-voltage conditions. When operating as a voltage reference, the LT1431MJ8 will regulate the output voltage to a specific value. This is typically set by a voltage divider circuit, which can be adjusted depending on the desired output voltage level. This is useful for ensuring that electronic components are not overexposed to higher voltages.When operating as a step-down converter, the LT1431MJ8 will reduce the input voltage to a lower level. This is achieved by a pulse width modulation (PWM) process, where the output voltage is generated by switching the input voltage on and off at a particular frequency. The output voltage can be adjusted by changing the frequency, allowing for customization and fine-tuning of the output.

Conclusion

The LT1431MJ8 is a powerful and reliable PMIC device, capable of providing voltage references and step-down into the automotive field. It is designed to provide accurate and reliable power management to mobile systems and achieves this by regulating the output voltage to specific levels and using a PWM process to reduce the input voltage to the desired level. As such, it is becoming an increasingly popular choice for automotive applications.

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