| Vin (Min) (V) | 1.8 |
| Vin (Max) (V) | 28 |
| Vout (Min) (V) | 0.76 |
| Vout (Max) (V) | 5.5 |
| Iout (Max) (A) | 10 |
| Iq (Typ) (uA) | 400 |
| Switching frequency (Min) (kHz) | 100 |
| Switching frequency (Max) (kHz) | 550 |
| Features | Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification |
| Regulated outputs (#) | 1 |
| Number of phases | 1 |
| Rating | Catalog |
- High Efficiency, Low Power Consumption, 4.5-μA
Typical Shutdown Current - Fixed Frequency Emulated On-Time Control,
Adjustable from 100 kHz to 550 kHz - D-CAP? Mode With 100-ns Load Step Response
- < 1% Initial Reference Accuracy
- Output Voltage Range: 0.75 V to 5.5 V
- Wide Input Voltage Range: 1.8 V to 28 V
- Selectable Auto-Skip/PWM-Only Operation
- Temperature Compensated (4500 ppm/°C)
Low-Side RDS(on) Overcurrent Sensing - Negative Overcurrent Limit
- Integrated Boost Diode
- Integrated OVP/UVP and Thermal Shutdown
- Powergood Signal
- Internal 1.2-ms Voltage Soft-Start
- Integrated Output Discharge (Soft-Stop)
- APPLICATIONS
- Notebook Computers
- I/O Supplies
- System Power Supplies
All other trademarks are the property of their respective owners
The TPS51117 device is a cost-effective, synchronous buck controller for POL voltage regulation in notebook PC applications. The controller is dedicated for the operation of the Adaptive On-Time D-CAP mode. This mode provides ease-of-use, low external component count, and fast transient response. Auto-skip mode for high efficiency down to the milliampere load range, or PWM-only mode for low-noise operation is selectable.
The current-sensing scheme for positive overcurrent and negative overcurrent protection is loss-less low-side RDS(on) sensing plus temperature compensation. The device receives a 5-V (4.5 V to 5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.
The TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified from ?40°C to 85°C.
