LM4128DQ1MFX3.3/NOPB

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The LM4128DQ1MFX3.3/NOPB is an integrated voltage reference, part of a power management integrated circuit (PMIC) family by Texas Instruments. It is designed to provide a highly accurate and stable reference voltage under varied power supply and temperature conditions. The device is specifically engineered to support automotive, motorsport, and other applications requiring reliable and long-term performance. This article will discuss the device’s application field, working principle, and features.

Application Field
The LM4128DQ1MFX3.3/NOPB is designed for automotive applications and motorsport providing a highaccuracy, 2.5V to 6.0V reference voltage over temperature. The device is ideal for voltage reference andregulation in power systems with high side and low side switches, providing an integrated over temperatureprotection. The LM4128 is optimized for linear voltage tracking with low dropouts performance and is suited forhigh accuracy automotive components such as fuel pumps, HVAC, climate control systems, ECUs, and othersafety-critical and general applications.

Working Principle
The LM4128DQ1MFX3.3/NOPB is designed to provide a high accuracy and low noise voltage reference over a -40°Cto +125°C temperature range, with peak-to-peak noise as low as 10µV over a 0.1Hz to 10 Hz bandwidth. The devicefeatures a low dropout voltage of 150mV at 1mA and a low output impedance of 10µΩ. The LM4128employed a proprietary voltage regulation loop architecture, with a cascode bipolar circuit in the referencepath, to provide high accuracy and low noise in the reference voltage, achieving an initial accuracy overtemperature of ±3.0mV for a 1.5V reference and ±4.0mV for a 2.5V reference. The device also offers a lowpower shutdown pin feature, allowing the system to be powered down when not active.

Features
The LM4128 provides several features which make it ideal for automotive and motorsport applications. It featuresan integrated ESD protection to up to 17kV, making it suitable for robust applications. In standby mode, itsquiescent current can be reduced to 25 μA, further improving the reference’s power consumption andoverall system performance. The device also features an over temperature protection feature, which shuts downthe system when an over temperature event occurs. This is ideal for motorsport and high efficiency applications.

The LM4128DQ1MFX3.3/NOPB is a highly accurate and stable voltage reference, making it ideal for automotive and motorsport applications. It offers a high accuracy and low noise reference voltage over the specified temperature range, with peak-to-peak noise levels as low as 10µV over a 0.1Hz to 10Hz bandwidth. The device is ESD protected up to 17kV, allows for low quiescent current in standby mode, and features an integrated over temperature protection feature. For these reasons, the LM4128 provides robust and reliable voltage reference solutions for automotive, motorsport, and other applications.

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