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TPS40009DGQ Datasheet(PDF) 1 Page - Texas Instruments |
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TPS40009DGQ Datasheet(HTML) 1 Page - Texas Instruments |
1 / 28 page TPS40007 TPS40009 SLUS589B− NOVEMBER 2003 − REVISED FEBRUARY 2005 LOW INPUT HIGHEFFICIENCY SYNCHRONOUS BUCK CONTROLLER 1 www.ti.com FEATURES D Operating Input Voltage 2.25 V to 5.5 V D Output Voltage as Low as 0.7 V D 1% Internal 0.7 V Reference D Predictive Gate Drivet N-Channel MOSFET Drivers for Higher Efficiency D Externally Adjustable Soft-Start and Overcurrent Limit D Fixed-Frequency Voltage-Mode Control − TPS40007, 300 kHz − TPS40009, 600 kHz D Source/Sink with VOUT Prebias D 10-Lead MSOP PowerPadt Package for Higher Performance D Thermal Shutdown D Internal Boostrap Diode SIMPLIFIED APPLICATION DIAGRAM APPLICATIONS D Networking Equipment D Telecom Equipment D Base Stations D Servers D DSP Power D Power Modules DESCRIPTION The TPS4000x are controllers for low-voltage, non-isolated synchronous buck regulators. These controllers drive an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the device controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI’s proprietary Predictive Gate Drive t technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated. UDG−03161 VIN VOUT 1 ILIM 10 BOOT 2FB 9 HDRV 3 COMP 8 SW 4 SS/SD 7 VDD 5 GND 6 LDRV TPS40007 TPS40009 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2003, 2004 Texas Instruments Incorporated PowerPAD t and Predictive Gate Drivet are trademarks of Texas Instruments Incorporated. |
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