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 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/TPS51163 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.
| Vin (min) (V) | 4.5 |
| Vin (max) (V) | 13.2 |
| Vout (min) (V) | 0.8 |
| Vout (max) (V) | 8 |
| Iout (max) (A) | 20 |
| Iq (typ) (mA) | 6 |
| Switching frequency (min) (kHz) | 300 |
| Switching frequency (max) (kHz) | 300 |
| Features | Enable, Power good, Pre-Bias Start-Up |
| Operating temperature range (°C) | -40 to 85 |
| Regulated outputs (#) | 1 |
| Number of phases | 1 |
| Rating | Catalog |
| Control mode | Voltage mode |
| Type | Controller |
| VSON (DRC) | 10 | 9 mm² 3 x 3 |
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