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TPS54328 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS54328 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 21 page V = 50 mV / div (-950 mV dc offset) O I = 1 A / div (0.75 to 2.25 A load step, slew rate = 1 A / µsec) O Time = 50 µsec / div TPS54328 www.ti.com SLVSAN2 – NOVEMBER 2010 4.5V to 18V Input, 3-A Synchronous Step-Down SWIFT™ Converter with Eco-Mode™ Check for Samples: TPS54328 1 FEATURES DESCRIPTION 23 • D-CAP2™ Mode Enables Fast Transient Response The TPS54328 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54328 • Low Output Ripple and Allows Ceramic Output enables system designers to complete the suite of Capacitor various end-equipment power bus regulators with a • Wide VIN Input Voltage Range: 4.5 V to 18 V cost effective, low component count, low standby • Output Voltage Range: 0.76 V to 7.0 V current solution. The main control loop for the TPS54328 uses the D-CAP2™ mode control that • Highly Efficient Integrated FETs Optimized provides a fast transient response with no external for Lower Duty Cycle Applications compensation components. The adaptive on-time – 100 m Ω (High Side) and 70 mΩ (Low Side) control supports seamless transition between PWM • High Efficiency, less than 10 mA at shutdown mode at higher load conditions and Eco-mode™ • High Initial Bandgap Reference Accuracy operation at light loads. Eco-mode™ allows the TPS54328 to maintain high efficiency during lighter • Adjustable Soft Start load conditions. The TPS54328 also has a proprietary • Pre-Biased Soft Start circuit that enables the device to adopt to both low • 700-kHz Switching Frequency (fSW) equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR • Cycle By Cycle Over Current Limit ceramic capacitors. The device operates from 4.5-V • Auto-Skip Eco-mode™ for High Efficiency at to 18-V VIN input. The output voltage can be Light Load programmed between 0.76 V and 7.0 V. The device also features an adjustable soft start time. The APPLICATIONS TPS54328 is available in the 8-pin DDA package, • Wide Range of Applications for Low Voltage and designed to operate from –40°C to 85°C. System – Digital TV Power Supply – High Definition Blu-ray Disc™ Players – Networking Home Terminal – Digital Set Top Box (STB) 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 D-CAP2, Eco-mode are trademarks of Texas Instruments. 3 Blu-ray Disc is a trademark of Blu-ray Disc Association. PRODUCTION DATA information is current as of publication date. Copyright © 2010, 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. |
Numéro de pièce similaire - TPS54328 |
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Description similaire - TPS54328 |
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