LMR51430YFDDCR

LMR51430 is an easy-to-use wide VIN SIMPLE SWITCHER synchronous buck converter capable of driving load currents up to 3A. The device features a wide input range of 4.5V to 36V, making it suitable for a variety of industrial applications requiring power regulation from unregulated sources. The LMR51430 operates at switching frequencies of 500kHz and 1.1MHz, supporting the use of relatively small inductors for improved solution size. The device is available in a PFM version for high efficiency at light loads and an FPWM version for constant-frequency operation with low output voltage ripple across the full load range. Soft-start and compensation circuits are implemented internally, minimizing the number of external components required. The device incorporates built-in protection features such as cycle-by-cycle current limiting, discontinuous mode short-circuit protection, and thermal shutdown under excessive power dissipation conditions. The LMR51430 is available in a 6-pin SOT-23 package.

Applications

• Electrical
• Building automation
• Motor drives
• General-purpose wide input voltage power supplies

Key features

• Functional Safety documentation supporting functional safety system design, dedicated to harsh industrial applications
• 4.5V to 36V input voltage range
• 3A continuous output current
• Minimum on-time: 70 ns
• Fixed switching frequency options: 500kHz and 1.1MHz
• Junction temperature range: -40°C to 150°C
• 98% maximum duty cycle
• Startup with pre-biased output
• Internal short-circuit protection with hiccup mode
• ±1.5% tolerance voltage reference
• Precision enable
• Compact and easy-to-use solution
• Integrated synchronous rectification
• Built-in compensation for ease of use
• SOT-23 package
• Pin-to-pin compatible with TPS54202 and TPS54302
• PFM and forced PWM (FPWM) options available
• Create custom designs using LMR51430 with WEBENCH PowerDesigner