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TPS54040ADRC Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54040ADRC Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 48 page  PH VIN GND BOOT VSENSE COMP TPS54040A EN RT /CLK SS /TR PWRGD V IN VIN V OUT EFFICIENCY vs LOADCURRENT 0 10 20 30 40 50 60 70 80 0 0.1 0.2 0.3 0.4 LoadCurrent- A 100 90 0.5 V =12V, V =5.0V, f =700kHz I O sw TPS54040A www.ti.com SLVSB58 – MARCH 2012 0.5 A, 42 V Step Down SWIFT™ DC/DC Converter with ECO-MODE™ Check for Samples: TPS54040A 1 FEATURES 23 • 3.5 V to 42 V Input Voltage Range • 0.8-V Internal Voltage Reference • 200-m Ω High-Side MOSFET • Available in MSOP-10 and VSON-10 Packages • High Efficiency at Light Loads with a Pulse • Supported by WEBENCH® and SwitcherPro™ Skipping Eco-Mode™ Software Tool • Tighter Enable Threshold than TPS54040 • For SWIFT™ Documentation, See the TI for More Accurate UVLO Voltage Website at http://www.ti.com/swift • Adjustable UVLO Voltage and Hysteresis APPLICATIONS • 116 μA Operating Quiescent Current • 12-V and 24-V Industrial and Commercial Low • 1.3 μA Shutdown Current Power Systems • 100 kHz to 2.5 MHz Switching Frequency • Aftermarket Auto Accessories: Video, GPS, • Synchronizes to External Clock Entertainment • Adjustable Slow Start/Sequencing • UV and OV Power Good Output DESCRIPTION The TPS54040A device is a 42 V, 0.5 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 input supply current to 116 μA. Using the enable pin, shutdown supply current is nominally 1.3 μA when the enable pin is low. 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 or tracking. An open drain power good signal indicates when 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. SPACER 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 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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