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.
FEATURES
Operating Input Voltage 2.25 V to 5.5 VOutput 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
(Picture:Pinout / Diagram)
