TLS850B0TEV50ATMA1

The TLS850B0TEV50ATMA1 is a linear voltage regulator integrated circuit (IC) specifically designed for automotive applications. The device is a low-dropout (LDO) regulator, meaning it maintains low voltage dropout even when operating at low currents. The device features two independent linear regulators and enables both series and parallel configurations.

The TLS850B0TEV50ATMA1 is a versatile LDO regulator that provides up to 3 A of output current, with a voltage range from 1.2 V to 13.2 V. It is designed to deliver exceptional current limiting and low output voltage noise in compact automotive circuits. Its rich features include adjustable current limits, high efficiency protection, shutdown, load detect and output reset functions, enabling it to be used in a variety of automotive applications.

Working principle

The TLS850B0TEV50ATMA1 operates using a voltage divider technique, and includes an adjustable reference voltage between 0.9 V to 1.7V. The reference voltage is set by connecting an external resistor to the pin configured as the reference voltage source. The output voltage is then regulated by controlling an internal P-channel MOSFET such that the output voltage equals the reference voltage. When the output voltage is lower than the reference voltage, the internal transistor is driven by an error amplifier, pulling the gate voltage up to increase the drain voltage.

The device also includes a current limit feature, which allows the device to safely handle larger current loads than would be possible with a resistor-based regulator. This is done by sensing the current drain on the output terminal and comparing it to an adjustable limit threshold. When the current exceeds the limit threshold, the device shuts down and enters a safe mode, which limits the current and protects against damage.

Application fields

The TLS850B0TEV50ATMA1 is well suited for automotive applications, due to its low-dropout and high-efficiency characteristics. It can be used to supply reliable and clean power to various automotive subsystems such as lighting, audio, and navigation systems. It is also suitable for industrial, medical, and instrumentation systems.

The device is a good choice for automotive applications that suffer from high thermal dissipation, high EMC interference, or high noise requirements. Its adjustable current limit feature is ideal for providing power in situations where mechanical sensors or electrical relays may be prone to failure. In addition, its low output noise makes it great for powering audio or other sensitive digital circuits.