| Vin (Min) (V) | 3 |
| Vin (Max) (V) | 28 |
| Vout (Min) (V) | 0.7 |
| Vout (Max) (V) | 2.6 |
| Iout (Max) (A) | 20 |
| Iq (Typ) (uA) | 320 |
| Switching frequency (Min) (kHz) | 266 |
| Switching frequency (Max) (kHz) | 465 |
| Features | Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification |
| Regulated outputs (#) | 1 |
| Number of phases | 1 |
| Rating | Catalog |
- Wide Input Voltage Range: 3 V to 28 V
- Output Voltage Range: 0.7 V to 2.6 V
- Wide Output Load Range: 0 to 20A+
- Built-in 0.5% 0.7 V Reference
- D-CAP? Mode with 100-ns Load Step Response
- Adaptive On Time Control Architecture With 4 Selectable
Frequency Setting - 4700 ppm/°C RDS(on) Current Sensing
- Internal 1-ms Voltage Servo Softstart
- Pre-Charged Start-up Capability
- Built in Output Discharge
- Power Good Output
- Integrated Boost Switch
- Built-in OVP/UVP/OCP
- Thermal Shutdown (Non-latch)
- SON-10 (DSC) Package
The TPS51218 is a small-sized single buck controller with adaptive on-time D-CAP? mode. The device is suitable for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supply in digital consumer products. A small package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency selections minimize design effort required for new designs. The skip-mode at light load condition, strong gate drivers and low-side FET RDS(on) current sensing supports low-loss and high efficiency, over a broad load range. The conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.7 V to 2.6 V. The device requires an external 5-V supply. The TPS51218 is available in a 10-pin SON package specified from –40°C to 85°C.
