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TPS5431 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS5431 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 36 page VIN NC NC ENA GND VSENSE BOOT PH TPS5430/31 VIN VOUT 95 60 70 80 90 100 0 0.5 1 1.5 2.5 3 3.5 I OutputCurrent A O - - EfficiencyvsOutputCurrent SimplifiedSchematic V I =12V V =5V f =500kHz T =25 C O s A o 2 50 55 65 75 85 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design TPS5430, TPS5431 SLVS632G – JANUARY 2006 – REVISED FEBRUARY 2015 TPS543x 3-A, Wide Input Range, Step-Down Converter 1 Features 3 Description The TPS543x is a high-output-current PWM converter 1 • Wide Input Voltage Range: that integrates a low-resistance, high-side N-channel – TPS5430: 5.5 V to 36 V MOSFET. Included on the substrate with the listed – TPS5431: 5.5 V to 23 V features are a high-performance voltage error amplifier that provides tight voltage regulation • Up to 3-A Continuous (4-A Peak) Output Current accuracy under transient conditions; an undervoltage- • High Efficiency up to 95% Enabled by 110-m Ω lockout circuit to prevent start-up until the input Integrated MOSFET Switch voltage reaches 5.5 V; an internally set slow-start • Wide Output Voltage Range: Adjustable Down to circuit to limit inrush currents; and a voltage feed- 1.22 V with 1.5% Initial Accuracy forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is • Internal Compensation Minimizes External Parts reduced to 18 μA typically. Other features include an Count active-high enable, overcurrent limiting, over-voltage • Fixed 500 kHz Switching Frequency for Small protection and thermal shutdown. To reduce design Filter Size complexity and external component count, the • Improved Line Regulation and Transient TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails Response by Input Voltage Feed Forward up to 23 V. The TPS5430 regulates a wide variety of • System Protected by Overcurrent Limiting, power sources including 24 V bus. Overvoltage Protection and Thermal Shutdown The TPS543x device is available in a thermally • –40°C to 125°C Operating Junction Temperature enhanced, easy to use 8-pin SOIC PowerPAD™ Range package. TI provides evaluation modules and the • Available in Small Thermally Enhanced 8-Pin SO Designer software tool to aid in quickly achieving PowerPAD™ Package high-performance power supply designs to meet aggressive equipment development cycles. 2 Applications Device Information(1) • Consumer: Set-top Box, DVD, LCD Displays PART NUMBER PACKAGE INPUT VOLTAGE • Industrial and Car Audio Power Supplies TPS5430 5.5 V to 36 V • Battery Chargers, High Power LED Supply HSOP (8) TPS5431 5.5 V to 23 V • 12-V/24-V Distributed Power Systems (1) For all available packages, see the orderable addendum at the end of the datasheet. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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