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Buck controllers (external switch)

TPS40000

ACTIVE

Low Input (2.25V-5.5V) 300 kHz Frequency, Synchronous Buck Controller, Source Only

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Data sheet

TPS40000

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 2.25 Vin (Max) (V) 5.5 Vout (Min) (V) 0.7 Vout (Max) (V) 4 Iout (Max) (A) 15 Iq (Typ) (uA) 1500 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 2.25 Vin (Max) (V) 5.5 Vout (Min) (V) 0.7 Vout (Max) (V) 4 Iout (Max) (A) 15 Iq (Typ) (uA) 1500 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
HVSSOP (DGQ) 10 9 mm² 3 x 3
  • 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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Technical documentation

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Type Title Date
* Data sheet TPS40000 Synchronous Buck Controller datasheet (Rev. D) 14 Nov 2005
More literature Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) 29 Oct 2018
Application note PowerPAD™ Thermally Enhanced Package (Rev. H) 06 Jul 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Automated Frequency Response Analyzer 09 Oct 2013
User guide TPS40000/1 Controller Enables High Power Sync Step-Down Converter for Low-Logic (Rev. B) 08 Jul 2005
User guide TPS40002/3 Controllers Enable BUCK Converter Operating From 2.5-V Supply (Rev. B) 08 Jul 2005
User guide Ultra-High Efficiency Buck Converter Using TPS40000/1 Controller Keeps Costs Low (Rev. B) 08 Jul 2005
User guide TPS40000/1 Controller Enables High Power Synchronous Step-Down Converter for Low (Rev. A) 27 Jan 2003
EVM User's guide TPS40001EVM (Rev. A) 27 Jan 2003
User guide TPS40002/3 Controllers Enable BUCK Converter Operating From 2.5-V Supply (Rev. A) 27 Jan 2003
User guide TPS40002/3 Controllers Enable Miniature Synchronous Step-Down Converter for Low (Rev. A) 27 Jan 2003
User guide Ultra-High Efficiency Buck Converter Using TPS40000/1 Controller Keeps Power Sys (Rev. A) 27 Jan 2003
Application note Predictive Gate Drive Boosts Converter Efficiency 18 Dec 2002
More literature Seminar 1400 Topic 7 The Implication of Synchronous Rectifiers to the Design of 22 Apr 2002

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