The TPS51113 and TPS51163DRCR are cost-optimized, feature rich, single-channel synchronous-buck controllers that operates from a single 4.5-V to 13.2-V supply and can convert an input voltage as low as 1.5 V.
The controller implements voltage mode control with a fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) switching frequency. The overcurrent (OC) protection employs the low-side RDS(on) current sensing and has user-programmable threshold.The OC threshold is set by the resistor from LDRV_OC pin to GND. The resistor value is read when the over-current programming circuit applies 10 μA of current to the LDRV_OC pin during the calibration phase of the start-up sequence.
The TPS51113/TPS51163DRCR also supports output pre-biased startup.
The strong gate drivers with low deadtime allow for the utilization of larger MOSFETs to achieve higher efficiency. An adaptive anti-cross conduction scheme is used to prevent shoot-through between the power FETs.
Feature
- Flexible Power Rails: 5 V to 12 V
- Reference: 800 mV ± 0.8%
- Voltage Mode Control
- Support Pre-biased Startup
- Programmable Overcurrent Protection with Low-Side RDS(on) Current Sensing
- Fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) Switching Frequency
- UV/OV Protections and Power Good Indicator
- Internal Soft-start
- Integrated High-Current Drivers Powered by VDD
- 10-Pin 3 × 3 SON Package
- APPLICATIONS
- Server and Desktop Computer Subsystem Power Supplies (MCH, IOCH, PCI, Termination)
- Distributed Power Supplies
- General DC-DC Converters
