LM385Z-1.2/LFT3

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LM385Z-1.2/LFT3 is a voltage reference integrated circuit belonging to the Power Management IC (PMIC) family developed by Texas Instruments to provide a stable and accurate voltage reference for regulating power in a system. It is essentially a voltage regulator circuit designed to maintain a steady output voltage, regardless of variations in input voltage or load current.

Application Fields

The primary application field of LM385Z-1.2/LFT3 is monitoring and regulating voltage in power supply systems. It is used in power supplies, telecom applications, automotive systems, industrial systems, and consumer products. In particular, it is able to regulate lower currents of 100 mA to as much as 1 A and can also provide voltage regulation for higher currents of 10A to as much as 20A.

Working Principle

The basic working principle of LM385Z-1.2/LFT3 voltage reference is as follows. It first uses a voltage regulator to sense the reference voltage and provide a precise output voltage. This output voltage is then compared with the input voltage, and a control loop adjusts the output voltage to match the input voltage if a discrepancy is detected.

When the output voltage and input voltage are the same, the control loop is disabled, the output voltage remains the same and power is conserved. However, this power saving feature can be disabled if it is not required. LM385Z-1.2/LFT3 also uses a comparator circuit, which compares the reference voltage with the input voltage and provides an alert if the two voltages start to drift apart.

In addition, LM385Z-1.2/LFT3 is designed to provide a wide operating temperature range and can operate between -40°C to +85°C. It also features a low leakage current of less than 1 μA and low power consumption of 50 μA at 1V output voltage. This makes it suitable for use in battery-operated systems.

What’s more, LM385Z-1.2/LFT3 integrates several more useful features such as input/output protection, thermal shutdown, frequency compensation and a temperature sensitive output to ensure its power stability.

LM385Z-1.2/LFT3 is a reliable and cost-effective voltage reference solution that can provide consistent output performance over wide temperature ranges for power supply systems.

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