TPS54340BDDAR

TPS54340B is a 42V, 3.5A step-down regulator with an integrated high-side MOSFET. It uses current-mode control for simple external compensation and flexible component selection. Low-ripple pulse-skip mode reduces no-load supply current to 146μA. When the enable pin is pulled low, shutdown supply current is reduced to 2μA. The UVLO is internally set at 4.3V but can be increased using the enable pin. The device internally controls the output voltage startup ramp to manage the startup process and eliminate overshoot. The wide switching frequency range enables optimization for either efficiency or external component size. Frequency foldback and thermal shutdown protect internal and external components from damage under overload conditions. The TPS54340B is available in an 8-pin thermally enhanced HSOIC PowerPAD package.

Applications

• 12V and 24V industrial and communication power systems

Key features

• Input voltage range 4.5V to 42V (absolute maximum 45V)
• 3.5A continuous current, 4.5A minimum peak inductor current limit
• Current mode control DC/DC converter
• 92mΩ high-side MOSFET
• High-efficiency Eco-mode with pulse skipping under light load conditions
• Low dropout under light load conditions using integrated bootstrap (BOOT) recharge FET
• 146μA quiescent operating current
• 2μA shutdown current
• 100kHz to 2.5MHz fixed switching frequency synchronized to external clock
• Adjustable UVLO voltage and hysteresis
• Internal soft-start
• Accurate cycle-by-cycle current limit
• Over-temperature, overvoltage, and frequency foldback protection
• 0.8V ±% internal voltage reference
• 8-pin HSOIC PowerPAD package
• -40°C to 150°C TJ operating range
• Create custom designs using TPS54340B with WEBENCH Power Designer