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Specifications
SKU: 11190692
| Parameter | Symbol | Min | Typ | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | 2.95 | - | 5.5 | V | Operating range |
| Output Voltage | VOUT | 0.8 | - | 3.3 | V | Adjustable |
| Output Current | IOUT | - | 3 | 3.5 | A | Maximum continuous output |
| Switching Frequency | fSW | - | 1.5 | - | MHz | Fixed switching frequency |
| Efficiency (Typical) | η | - | 94 | - | % | At 3.3V input, 1.8V output, 1A load |
| Quiescent Current | IQ | - | 1.5 | - | mA | In active mode |
| Shutdown Current | ISD | - | 0.1 | - | μA | In shutdown mode |
| Enable Input Threshold | VEN | 0.9 | 1.1 | 1.3 | V | Low to high threshold |
| Soft-Start Time | tSS | - | 1.5 | - | ms | Typical soft-start duration |
| Thermal Shutdown Threshold | TSD | - | 160 | - | °C | Typical thermal shutdown |
| Operating Temperature | TOPR | -40 | - | 125 | °C | Junction temperature range |
| Storage Temperature | TSTG | -65 | - | 150 | °C | Storage temperature range |
Instructions for Using TPS51116RGET
Power Supply Connection:
- Connect the input voltage (VIN) to the power supply within the specified range of 2.95V to 5.5V.
- Ensure proper decoupling capacitors are placed close to the VIN pin to filter out noise and stabilize the input voltage.
Output Configuration:
- Set the desired output voltage (VOUT) using external resistors connected to the FB (feedback) pin. The formula for calculating the resistor values is: [ V_ = V_ left(1 + fracright) ] where ( V_ ) is typically 0.8V.
- Use the recommended inductor and output capacitor values to ensure stable operation and good transient response.
Enable Control:
- The EN (enable) pin can be used to control the on/off state of the regulator. Apply a voltage greater than 1.1V to enable the device and less than 0.9V to disable it.
- For automatic startup, connect the EN pin directly to VIN.
Thermal Management:
- Ensure adequate heat dissipation by mounting the device on a suitable heatsink or PCB with sufficient copper area.
- Monitor the junction temperature to avoid exceeding the maximum operating temperature of 125°C.
Soft-Start:
- The soft-start feature helps reduce inrush current during startup. The typical soft-start time is 1.5ms, but this can be adjusted using an external capacitor if needed.
Protection Features:
- The device includes overcurrent protection, thermal shutdown, and undervoltage lockout (UVLO) to protect against various fault conditions.
- Verify that the input voltage is above the UVLO threshold (typically 2.95V) before enabling the device.
Layout Considerations:
- Place the input and output capacitors as close as possible to the respective pins to minimize parasitic inductance.
- Route the ground connections to form a star ground to minimize noise and improve stability.
By following these instructions, you can ensure reliable and efficient operation of the TPS51116RGET buck converter.
(For reference only)Inquiry - TPS51116RGET
