说明

The TPS51113 and TPS51163 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 R_DS(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/TPS51163 also supports output pre-biased startup.

特性

• 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 R_DS(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