TPS40009DGQ
TEXAS INSTRUMENTS TPS40009DGQ 直流/直流控制器, 高效, 2.25V至5.5V, 1路输出, 同步降压, 700kHz, MSOP-10
The is a Buck Controller for low-voltage non-isolated synchronous buck regulators. It drives 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 "s proprietary Predictive Gate Drive™ 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. The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor connected to the SS/SD pin.
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- 1% Internal 0.7V reference
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- Predictive Gate Drive™ N-channel MOSFET drivers for higher efficiency
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- Externally adjustable soft-start and overcurrent limit
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- Fixed-frequency voltage-mode control
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- Source/sink with VOUT pre-bias
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- Internal bootstrap diode the SS/SD pin is also used for shutdown
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- Green product and no Sb/Br
