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TPS56428DDAR Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS56428DDAR Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 22 page Vout( 50mV/div) Iout( 2A/div) 100us/div TPS56428 TPS56428 www.ti.com SLVSBV4A – APRIL 2013 – REVISED APRIL 2013 4.5V to 18 V Input, 4-A Synchronous Step-Down Converter with Advanced Eco-mode™ Check for Samples: TPS56428 1 FEATURES DESCRIPTION The TPS56428 is an adaptive on-time D-CAP2™ 23 • D-CAP2™ Mode Enables Fast Transient mode synchronous buck converter. Response The TPS56428 enables system designers to • Low Output Ripple and Allows Ceramic Output complete the suite of various end-equipment power Capacitor bus regulators with a cost effective, low component • Wide VIN Input Voltage Range: 4.5 V to 18 V count, low standby current solution. • Output Voltage Range: 0.6 V to 7.0 V The main control loop for the TPS56428 uses the D- • Highly Efficient Integrated FETs Optimized CAP2™ mode control that provides a fast transient for Lower Duty Cycle Applications response with no external compensation – 68 m Ω (High Side) and 37 mΩ (Low Side) components. • High Efficiency, Less Than 10 μA at Shutdown The adaptive on-time control supports seamless • High Initial Bandgap Reference Accuracy transition between PWM mode at higher load conditions and advanced Eco-mode™ operation at • Pre-Biased Soft Start light loads. • 650-kHz Switching Frequency (fSW) Advanced Eco-mode™ allows the TPS56428 to • Cycle By Cycle Over Current Limit maintain high efficiency during lighter load conditions. • Advanced Auto-Skip Eco-mode™ for High The TPS56428 also has a proprietary circuit that Efficiency at Light Load enables the device to adopt to both low equivalent • Power Good output series resistance (ESR) output capacitors, such as • Fixed Soft Start : 1.0ms POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18 V APPLICATIONS VIN input. • Wide Range of Applications for Low Voltage The output voltage can be programmed between System 0.6V and 7.0V. – Digital TV Power Supply The device also features a fixed 1 msec soft start – High Definition Blu-ray Disc™ Players time. – Networking Home Terminal The TPS56428 is available in 8-pin DDA package and is designed to operate over the ambient – Digital Set Top Box (STB) temperature range of –40°C to 85°C. 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 © 2013, 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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Description similaire - TPS56428DDAR |
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