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TPS54140QDGQRQ1 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54140QDGQRQ1 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 52 page  PH VIN GND BOOT VSENSE COMP TPS54140 EN RT /CLK SS /TR PWRGD EFFICIENCY vs LOADCURRENT 50 55 60 65 70 75 80 85 90 0 0.25 0.50 0.75 1 1.25 1.50 1.75 2 LoadCurrent- A V =12V, V =3.3V, f =1200kHz I O sw TPS54140-Q1 www.ti.com SLVSA24C – OCTOBER 2009 – REVISED AUGUST 2012 1.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-mode™ CONTROL Check for Samples: TPS54140-Q1 1 FEATURES • Adjustable Undervoltage Lockout Voltage and Hysteresis 2 • Qualified for Automotive Applications • 0.8-V Internal Voltage Reference • 3.5-V to 42-V Input Voltage Range • Supported by SwitcherPro™ Software Tool • 200-m Ω High-Side MOSFET (http://focus.ti.com/docs/toolsw/folders/print/s • High Efficiency at Light Loads With Pulse- witcherpro.html) Skipping Eco-mode™ Control Scheme • For SWIFT™ Documentation, See the TI • 116- μA Operating Quiescent Current Website at http://www.ti.com/swift • 1.3- μA Shutdown Current • 100-kHz to 2.5-MHz Switching Frequency APPLICATIONS • Synchronizes to External Clock • 12-V and 24-V Industrial and Commercial Low • Adjustable Slow Start/Sequencing Power Systems • Undervoltage and Overvoltage Power-good • Aftermarket Automotive Accessories: Video, Output GPS, Entertainment DESCRIPTION The TPS54140-Q1 device is a 42-V 1.5-A step-down regulator with an integrated high-side MOSFET. Current- mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load, input supply current to 116 μA. Using the enable pin, shutdown supply current is reduced to 1.3 μA. Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing or tracking. An open- drain power good signal indicates the output is within 92% to 109% of its nominal voltage. A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition. The TPS54140-Q1 is available in a 10-pin thermally enhanced MSOP PowerPAD™ package (DGQ) and a 10- pin SON package (DRC). SIMPLIFIED SCHEMATIC 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 Eco-mode, SwitcherPro, SWIFT, PowerPAD are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2009–2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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