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TPS54227 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54227 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 19 page TPS54227DDA 100 s/div m Vout (50 mV/div) Iout (1 A/div) TPS54227 www.ti.com SLVSAU2 – MAY 2011 4.5V to 18V Input, 2-A SYNCHRONOUS STEP DOWN (SWIFTTM ) CONVERTER Check for Samples: TPS54227 1 FEATURES DESCRIPTION The TPS54227 is an adaptive on-time D-CAP2 ™ 23 • D-CAP2 ™ Mode Enables Fast Transient mode synchronous buck converter. TheTPS54227 Response enables system designers to complete the suite of • Low Output Ripple and Allows Ceramic Output various end equipment ’s power bus regulators with a Capacitor cost effective, low component count, low standby current solution. The main control loop for the • Wide VIN Input Voltage Range: 4.5 V to 18 V TPS54227 uses the D-CAP2 ™ mode control which • Output Voltage Range: 0.76 V to 7.0 V provides a fast transient response with no external • Highly Efficient Integrated FETs Optimized compensation components. The TPS54227 also has for Lower Duty Cycle Applications a proprietary circuit that enables the device to adopt – 155 mΩ (High Side) and 108 mΩ (Low Side) to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and • High Efficiency, Less Than 10 μA at Shutdown ultra-low ESR ceramic capacitors. The device • High Initial Bandgap Reference Accuracy operates from 4.5-V to 18-V VIN input. The output • Adjustable Soft Start voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. • Pre-Biased Soft Start The TPS54227 is available in the 8-pin DDA • 700-kHz Switching Frequency (fSW) package, and designed to operate from –40°C to • Cycle By Cycle Over Current Limit 85 °C. APPLICATIONS • Wide Range of Applications for Low Voltage 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 is a trademark 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 © 2011, 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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