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IC REG CTRLR
• 4.5-V to 42-V (45-V Abs Max) Input Range
• 3.5-A Continuous Current, 4.5-A Minimum Peak Inductor Current Limit
• Current Mode Control DC/DC Converter
• 92-mΩ High-Side MOSFET
• High Efficiency at Light Loads with Pulse Skipping Eco-mode™ • Low Dropout at Light Loads with Integrated BOOT Recharge FET
• 146-μA Operating Quiescent Current
• 2-μA Shutdown Current
• 100-kHz to 2.5-MHz Fixed Switching Frequency
• Synchronizes to External Clock
• Adjustable UVLO Voltage and Hysteresis
• Internal Soft Start
• Accurate Cycle-by-Cycle Current Limit
• Thermal, Overvoltage, and Frequency Foldback Protection
• 0.8 V 1% Internal Voltage Reference
• 8-Pin HSOIC with PowerPAD™ Package
• –40°C to 150°C TJ Operating Range
• Create a Custom Design using the TPS54340B with the WEBENCH® Power Designer
12-V and 24 V Industrial and Communications Power Systems
The TPS54340B is a 42-V,3.5-A.step-down requlator with an intearated high side MOSFET, Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no-load supply current to 146 uA. Shutdown supply current is reduced to 2 μA when the enable pin is pulled low. Underyoltage lockout is internally set at 4.3 Vbut can be increased using the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot. A wide switching-frequency range allows either efficiency or external component size to be optimized. Frequency foldback and thermal shutdown protect internal and external components during an overload condition. The TPS54340B is available in an 8-pin thermally enhanced HSOIC PowerPADT package.
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