LMR66430-Q1

The LMR66430-Q1 is a high-efficiency, 3.5A synchronous buck converter designed for automotive and industrial applications, manufactured by Texas Instruments. It operates over an input voltage range of 4.5V to 36V, making it suitable for a wide variety of power supply scenarios including battery-powered systems and 12V/24V automotive networks. The device integrates a high-side N-channel MOSFET with low RDS(on) to minimize conduction losses and improve efficiency across varying load conditions. This converter features a fixed-frequency PWM architecture operating at 600kHz, enabling the use of small external components such as inductors and capacitors while maintaining excellent transient response and output regulation. It supports both forced continuous conduction mode (CCM) and pulse-skipping mode (PSM) operation to optimize efficiency across light and heavy loads—critical for extending battery life in portable or remote systems. The LMR66430-Q1 includes comprehensive protection features such as over-current protection (OCP), thermal shutdown, under-voltage lockout (UVLO), and over-voltage protection (OVP), ensuring safe operation in demanding environments. Its enable pin allows for system-level control, while the soft-start function limits inrush current during startup, reducing stress on the input source and downstream circuitry. Designed for robust performance in harsh environments, the LMR66430-Q1 meets AEC-Q100 Grade 1 qualification, making it ideal for automotive applications requiring long-term reliability and stability under temperature extremes (-40°C to +125°C). The device also offers a compact 8-pin SOIC package, facilitating easy integration into space-constrained designs. Its high integration level reduces the need for external components, simplifying PCB layout and lowering overall system cost. The converter’s ability to deliver up to 3.5A of continuous output current makes it well-suited for powering microprocessors, sensors, and peripherals in automotive infotainment systems, ADAS modules, and industrial control units. Additionally, its wide input range and efficient operation support applications like telematics, ECU power management, and factory automation equipment.