Low Input (2.25V-5.5V) 300 kHz Frequency, Synchronous Buck Controller, Source Only
Product details
Parameters
Package | Pins | Size
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.
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 TIs 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.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HVSSOP (DGQ) | 10 | View options |
Ordering & quality
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Support & training
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