Infineon TLD1121EL: A High-Performance Dual-Channel Linear Regulator for Automotive and Industrial Applications
The demand for robust, efficient, and compact power management solutions is paramount in modern automotive and industrial electronics. Addressing this need, Infineon Technologies introduces the TLD1121EL, a highly advanced dual-channel linear voltage regulator engineered to set a new benchmark for performance and reliability in harsh operating environments.
This integrated circuit (IC) consolidates two independent linear regulators into a single, space-saving PG-DSO-14 package, making it an ideal choice for applications where board space is at a premium. Each channel is capable of delivering a continuous output current of up to 150 mA, providing ample power for a wide range of subsystems, including sensors, microcontrollers (MCUs), and CAN transceivers.
A key strength of the TLD1121EL lies in its exceptional input voltage range from 3.0 V to 40 V. This wide operating range allows it to withstand demanding conditions such as automotive load-dump events, making it perfectly suited for 12 V and 24 V battery systems. Furthermore, its very low dropout voltage ensures high efficiency even when the input voltage is only marginally higher than the output, preserving battery life and reducing heat dissipation.
Comprehensive protection features are integral to its design, guaranteeing safe operation under fault conditions. The device includes built-in over-current protection (OCP), thermal shutdown (TSD), and over-voltage protection (OVP) on the input side. Each channel can be individually enabled or disabled via separate control pins, offering flexible power sequencing management. A dedicated error flag pin for each regulator provides immediate diagnostic feedback to the host MCU, signaling events like output short-circuits or thermal warnings, which is critical for functional safety applications.
The high accuracy of the output voltage (±2%) ensures stable and precise power delivery, which is crucial for sensitive analog and digital components. Its excellent load and line transient response maintain stability across various operating conditions. Designed to meet the stringent requirements of the automotive industry, the TLD1121EL is AEC-Q100 qualified and operates reliably over a wide junction temperature range of -40 °C to 150 °C.
Typical applications span a broad spectrum, from body control modules, instrument clusters, and advanced driver-assistance systems (ADAS) in vehicles to programmable logic controllers (PLCs), industrial automation, and smart sensors in industrial settings.
ICGOODFIND: The Infineon TLD1121EL emerges as a superior power management solution, masterfully combining dual-channel integration, ruggedness for harsh environments, and comprehensive diagnostic capabilities. Its robust design, meeting automotive-grade standards, makes it an exceptionally reliable and versatile choice for engineers designing next-generation automotive and industrial systems.
Keywords: Dual-Channel Linear Regulator, Automotive-Grade, AEC-Q100, Wide Input Voltage, Over-Current Protection
