TPS54340BQDDARQ1

TPS54340B-Q1 is a 42V, 3.5A step-down regulator with an integrated high-side MOSFET. Per ISO 7637, the device withstands load dump pulses up to 45V. Current mode control provides 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 1μA. The UVLO is internally set at 4.3V but can be raised using an external resistor divider on 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 of either efficiency or external component size. Frequency foldback and thermal shutdown protect internal and external components under overload conditions. The TPS54340B-Q1 is available in an 8-pin thermally enhanced HSOP PowerPAD package.

Applications

• Vehicle accessories: GPS, infotainment systems, ADAS, eCall
• USB dedicated charging ports and battery chargers
• Industrial automation and motor control
• 12V and 24V industrial, automotive, and communication power systems

Key features

• Automotive electronics application certified with the following AEC-Q100 results
• Device temperature grade 1: ambient operating temperature range of -40°C to 125°C
• Device HBM ESD classification level H1C
• Device CDM ESD classification level C3B
• High efficiency at light load with pulse-skip Eco-mode™
• 92mΩ high-side MOSFET
• 146μA quiescent operating current and 2μA shutdown current
• 100kHz to 2.5MHz adjustable switching frequency, synchronizable to external clock
• Low dropout at light load using integrated BOOT recharge FET
• Adjustable UVLO voltage and hysteresis
• 0.8% internal voltage reference
• 8-pin HSOP package with PowerPAD™
• -40°C to 150°C TJ operating range
• Use TPS54340B-Q1 with WEBENCH Power Designer to create custom designs