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TPS54331DR Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS54331DR Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 36 page 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 I -LoadCurrent- A L V =3.3V O V =12V I V =18V I V =24V I V =28V I V =5V I PH VIN GND BOOT VSENSE COMP SS C SS D1 VIN EN C I C BOOT L O C O Ren1 R O2 C 1 C 2 R 3 Ren2 R O1 TPS54331D V OUT Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS54331 SLVS839F – JULY 2008 – REVISED OCTOBER 2014 TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode™ 1 Features 3 Description The TPS54331 device is a 28-V, 3-A non- 1 • 3.5 to 28-V Input Voltage Range synchronous buck converter that integrates a low • Adjustable Output Voltage Down to 0.8 V RDS(on) high-side MOSFET. To increase efficiency at • Integrated 80-m Ω High-Side MOSFET Supports light loads, a pulse skipping Eco-mode feature is up to 3-A Continuous Output Current automatically activated. Furthermore, the 1- μA shutdown supply-current allows the device to be used • High Efficiency at Light Loads With a Pulse in battery-powered applications. Current mode control Skipping Eco-mode™ with internal slope compensation simplifies the • Fixed 570 kHz Switching Frequency external compensation calculations and reduces • Typical 1- μA Shutdown Quiescent Current component count while allowing the use of ceramic output capacitors. A resistor divider programs the • Adjustable Slow-Start Limits Inrush Currents hysteresis of the input undervoltage lockout. An • Programmable UVLO Threshold overvoltage transient protection circuit limits voltage • Overvoltage Transient Protection overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency • Cycle-by-Cycle Current Limit, Frequency Fold foldback and thermal shutdown protect the device Back, and Thermal Shutdown Protection and the load in the event of an overload condition. • Available in Easy-to-Use SOIC8 Package or The TPS54331 device is available in an 8-pin SOIC Thermally Enhanced SOIC8 PowerPAD™ package and 8-pin SO PowerPAD package that have Package been internally optimized to improve thermal • Supported by WEBENCH® Software Tool performance. (www.TI.com/WEBENCH) Device Information(1) 2 Applications PART NUMBER PACKAGE BODY SIZE (NOM) SOIC (8) • Consumer Applications such as Set-Top Boxes, TPS54331 4.90 mm × 3.90 mm SO PowerPAD (8) CPE Equipment, LCD Displays, Peripherals, and Battery Chargers (1) For all available packages, see the orderable addendum at the end of the datasheet. • Industrial and Car-Audio Power Supplies • 5-V, 12-V, and 24-V Distributed Power Systems 4 Simplified Schematic TPS54331 (D Package) Efficiency 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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