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TPS40000

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

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

TPS40000

ACTIVE
Data sheet Order now

Product details

Parameters

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 open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

HVSSOP (DGQ) 10 15 mm² 3 x 4.9 open-in-new Find other Buck controllers (external switch)

Features

  • 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.

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

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SCHEMATIC Download
SLVR289.PDF (46 KB)
SCHEMATIC Download
SLVR293.PDF (46 KB)
BILL OF MATERIALS (BOM) Download
SLVR290.PDF (22 KB)
BILL OF MATERIALS (BOM) Download
SLVR294.PDF (24 KB)

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