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TPS54040DGQ

製品説明
仕様・特性

TPS54040A www.ti.com SLVSB58A – MARCH 2012 – REVISED JANUARY 2014 0.5 A, 42 V Step Down DC/DC Converter with Eco-mode™ Check for Samples: TPS54040A FEATURES 1 • • • 23 • • • • • • • 3.5 V to 42 V Input Voltage Range 200-mΩ High-Side MOSFET High Efficiency at Light Loads with a Pulse Skipping Eco-mode™ Tighter Enable Threshold than TPS54040 for More Accurate UVLO Voltage Adjustable UVLO Voltage and Hysteresis 116 μA Operating Quiescent Current 1.3 μA Shutdown Current 100 kHz to 2.5 MHz Switching Frequency Synchronizes to External Clock Adjustable Slow Start/Sequencing • • • • UV and OV Power Good Output 0.8-V Internal Voltage Reference Available in MSOP-10 and VSON-10 Packages Supported by WEBENCH® and SwitcherPro™ Software Tool APPLICATIONS • • 12-V and 24-V Industrial and Commercial Low Power Systems Aftermarket Auto Accessories: Video, GPS, Entertainment 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 VIN EFFICIENCY vs LOAD CURRENT PWRGD VIN TPS54040A EN 100 90 BOOT 80 PH RT /CLK COMP VSENSE V OUT Efficiency - % SS /TR 70 60 50 40 30 GND VI = 12 V, VO = 5.0 V, fsw = 700 kHz 20 10 0 0 0.1 0.2 0.3 Load Current - A 0.4 0.5 1 2 3 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. Eco-mode, SwitcherPro are trademarks of Texas Instruments. WEBENCH is a registered trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2012–2014, Texas Instruments Incorporated

ブランド

TI

会社名

Texas Instruments Incorporated

本社国名

U.S.A

事業概要

世界25ヶ国以上に製造・販売拠点を有する国際的な半導体企業であり、デジタル情報家電、ワイヤレス、ブロードバンド市場に欠かせないデジタル信号処理を行うDSPと、それに関連するアナログIC、マイクロコントローラを主力製品としている。

供給状況

 
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