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Specifications
SKU: 105856
Video DAC with Color Palette RAMDAC
| Parameter | Symbol | Min | Typ | Max | Unit | Description |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | 2.5 | - | 5.5 | V | Operating input voltage range |
| Output Voltage | VOUT | - | 3.3 | - | V | Fixed output voltage |
| Output Current | IOUT | - | - | 800 | mA | Maximum continuous output current |
| Quiescent Current | IQ | - | 1.5 | - | μA | Quiescent current at no load |
| Dropout Voltage | VDROPOUT | - | 200 | - | mV | Typical dropout voltage at full load |
| Load Regulation | - | - | 1 | - | % | Load regulation from 10% to 100% load |
| Line Regulation | - | - | 0.2 | - | %/V | Line regulation over the entire input voltage range |
| Ripple Rejection | - | - | 60 | - | dB | Power supply rejection ratio at 1 kHz |
| Operating Temperature | TOPR | -40 | - | 125 | °C | Operating junction temperature range |
| Storage Temperature | TSTG | -65 | - | 150 | °C | Storage temperature range |
| Package Type | - | - | - | - | SOT-23-5 | Surface mount package type |
Instructions for Using BT478KPJ80
Input Voltage:
- Ensure the input voltage is within the specified range (2.5V to 5.5V). Exceeding this range can damage the device.
Output Voltage:
- The output voltage is fixed at 3.3V. No external components are required to set the output voltage.
Output Current:
- The maximum continuous output current is 800mA. Avoid exceeding this limit to prevent overheating or damage.
Quiescent Current:
- The quiescent current is typically 1.5μA. This low current consumption makes the device suitable for battery-powered applications.
Dropout Voltage:
- The typical dropout voltage is 200mV. This means the input voltage should be at least 3.5V (3.3V + 200mV) to ensure stable operation.
Load Regulation:
- The load regulation is 1%, meaning the output voltage will vary by no more than 1% over the load range from 10% to 100%.
Line Regulation:
- The line regulation is 0.2%/V, indicating that the output voltage will change by 0.2% for every volt change in the input voltage.
Ripple Rejection:
- The power supply rejection ratio (PSRR) is 60dB at 1kHz, which helps in filtering out input voltage ripple.
Operating Temperature:
- The operating junction temperature range is -40°C to 125°C. Ensure the device does not exceed these limits to avoid thermal shutdown or damage.
Storage Temperature:
- Store the device in a temperature range of -65°C to 150°C to maintain its performance and reliability.
Package Type:
- The device is available in a SOT-23-5 surface mount package. Follow standard surface mount soldering procedures for assembly.
Handling:
- Handle the device with care to avoid static discharge and physical damage. Use appropriate ESD protection measures during handling and installation.
Circuit Design:
- For optimal performance, place bypass capacitors close to the input and output pins. A 10μF ceramic capacitor on the input and a 10μF ceramic capacitor on the output are recommended.
Thermal Management:
- If the device is expected to operate near its maximum output current, consider adding a heatsink or ensuring adequate airflow to dissipate heat.
Testing:
- Before finalizing the design, test the circuit under various conditions to ensure it meets the required specifications and performance criteria.
Inquiry - BT478KPJ80
