TPS7B4261-Q1

The TPS7B4261-Q1 is a high-performance, low-dropout (LDO) voltage regulator designed for automotive applications, offering exceptional stability and efficiency under demanding conditions. It delivers a fixed output voltage of 3.3 V with a maximum output current of 600 mA, making it suitable for powering sensitive analog and digital circuits in modern vehicle systems. This device features a very low quiescent current of just 55 µA, which significantly improves system power efficiency—especially important in always-on automotive electronics where minimizing battery drain is critical. The regulator operates over a wide input voltage range from 4.5 V to 18 V, allowing compatibility with various automotive power sources including 12 V and 24 V systems. Its ultra-low dropout voltage of only 180 mV at full load ensures reliable operation even during transient voltage drops or under high-load conditions. The TPS7B4261-Q1 incorporates advanced protection mechanisms such as thermal shutdown, current limit, and reverse battery protection, enhancing system reliability in harsh automotive environments. It also includes an enable pin for remote control and a soft-start feature that minimizes inrush current during startup, reducing stress on the power supply and connected components. Designed to meet AEC-Q100 Grade 1 qualification standards, this LDO is built for operation across an extended temperature range from -40°C to +125°C, ensuring robust performance in extreme ambient conditions commonly found in automotive settings. It supports stable operation with ceramic output capacitors as small as 1 µF, simplifying PCB layout and reducing overall solution size. The device is ideal for use in infotainment systems, ADAS (Advanced Driver Assistance Systems), telematics modules, and body control units where clean, stable power is essential for microcontrollers, sensors, and communication interfaces. Its combination of low noise, high PSRR (Power Supply Rejection Ratio) up to 60 dB at 1 kHz, and fast transient response makes it particularly effective in filtering out switching noise from other power rails within complex automotive platforms. With its compact 3-pin SOT-23 package, the TPS7B4261-Q1 provides a space-efficient solution for designers seeking reliable, high-quality regulation in safety-critical and mission-critical automotive applications.