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TPS40005

NO RECOMENDADO PARA NUEVOS DISEÑOS

Controlador reductor síncrono con entrada baja (2.25 V-5.5 V), frecuencia de 600 kHz, fuente/disipad

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Hoja de datos

TPS40005

NO RECOMENDADO PARA NUEVOS DISEÑOS
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Detalles del producto

Rating Catalog Iout (max) (A) 15 Vin (max) (V) 5.5 Vin (min) (V) 2.25 Vout (max) (V) 4 Vout (min) (V) 0.7 Control mode Voltage mode Duty cycle (max) (%) 83 Iq (typ) (A) 0.0015 Number of phases 1 Operating temperature range (°C) -40 to 85
Rating Catalog Iout (max) (A) 15 Vin (max) (V) 5.5 Vin (min) (V) 2.25 Vout (max) (V) 4 Vout (min) (V) 0.7 Control mode Voltage mode Duty cycle (max) (%) 83 Iq (typ) (A) 0.0015 Number of phases 1 Operating temperature range (°C) -40 to 85
HVSSOP (DGQ) 10 14.7 mm² (3 mm × 4.9 mm)
  • Operating Input Voltage 2.25 V to 5.5 V
  • Output Voltage as Low as 0.7 V
  • 1% Internal 0.7 V Reference
  • Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
  • Externally Adjustable Soft-Start and Overcurrent Limit
  • Source-Only Current or Source/Sink Current
  • Versions for Starting into VOUT Pre-Bias
  • 10-Lead MSOP PowerPad™ Package for Higher Performance
  • Thermal Shutdown
  • Internal Boostrap Diode
  • Fixed-Frequency, Voltage-Mode Control
    • TPS40000/1/4 300-kHz
    • TPS40002/3/5 600-kHz
  • APPLICATIONS
    • Networking Equipment
    • Telecom Equipment
    • Base Stations
    • Servers
    • DSP Power
    • Power Modules

PowerPAD™ and Predictive Gate Drive™ are trademarks of Texas Instruments Incorporated.
  • Operating Input Voltage 2.25 V to 5.5 V
  • Output Voltage as Low as 0.7 V
  • 1% Internal 0.7 V Reference
  • Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
  • Externally Adjustable Soft-Start and Overcurrent Limit
  • Source-Only Current or Source/Sink Current
  • Versions for Starting into VOUT Pre-Bias
  • 10-Lead MSOP PowerPad™ Package for Higher Performance
  • Thermal Shutdown
  • Internal Boostrap Diode
  • Fixed-Frequency, Voltage-Mode Control
    • TPS40000/1/4 300-kHz
    • TPS40002/3/5 600-kHz
  • APPLICATIONS
    • Networking Equipment
    • Telecom Equipment
    • Base Stations
    • Servers
    • DSP Power
    • Power Modules

PowerPAD™ and Predictive Gate Drive™ are trademarks of Texas Instruments Incorporated.

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™ 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. The SS/SD pin is also used for shutdown.

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™ 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. The SS/SD pin is also used for shutdown.
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* Hoja de datos TPS40000 Synchronous Buck Controller datasheet (Rev. D) 14/11/2005

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