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TPS54140ADGQR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54140ADGQR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 51 page  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 PH VIN GND BOOT VSENSE COMP TPS54140A EN RT /CLK SS /TR PWRGD V IN VIN V OUT TPS54140A www.ti.com SLVSB55A – MAY 2012 – REVISED JULY 2012 1.5-A, 42 V Step Down SWIFT™ DC/DC Converter with Eco-mode™ Check for Samples: TPS54140A 1 FEATURES 23 • 3.5 V to 42 V Input Voltage Range • 0.8-V Internal Voltage Reference • 200-m Ω High-Side MOSFET • MSOP10 and 3mm x 3mm VSON-10 Package With PowerPAD™ • High Efficiency at Light Loads with a Pulse Skipping Eco-mode™ • Supported by WEBENCH® and SwitcherPro™ Software Tool • Tighter Enable Threshold than TPS54140 for More Accurate UVLO Voltage • For SWIFT™ Documentation, See the TI Website at http://www.ti.com/swift • Adjustable UVLO Voltage and Hysteresis • 116 μA Operating Quiescent Current APPLICATIONS • 1.3 μA Shutdown Current • 12-V and 24-V Industrial and Commercial Low • 100 kHz to 2.5 MHz Switching Frequency Power Systems • Synchronizes to External Clock • Aftermarket Auto Accessories: Video, GPS, • Adjustable Slow Start/Sequencing Entertainment • UV and OV Power Good Output DESCRIPTION The TPS54140A 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, regulated output supply current to 116 μA. Using the enable pin, shutdown supply current is reduced to 1.3 μA. Under voltage 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/tracking. An open drain power good signal indicates the output is within 94% to 107% 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. 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, PowerPAD, SwitcherPro, SWIFT are trademarks of Texas Instruments. 3 WEBENCH is a registered trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 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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