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Specifications
SKU: 817084
Quad bus buffers 3-state
| Parameter | Symbol | Min | Typical | Max | Unit | Description |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | 4.5 | 40 | V | Operating input voltage range | |
| Output Voltage Range | VOUT | V | Adjustable from 1.23V to VIN - 2V | |||
| Quiescent Current | IQ | 1.2 | mA | Current consumption at no load | ||
| Load Regulation | 0.1 | %/A | Change in output voltage with load current | |||
| Line Regulation | 0.01 | %/V | Change in output voltage with input voltage | |||
| Dropout Voltage | VDROPOUT | 1.2 | V | Voltage difference between VIN and VOUT at full load | ||
| Reference Voltage | VREF | 1.2 | 1.23 | 1.26 | V | Internal reference voltage |
| Maximum Output Current | IOUT | 1.5 | 3 | A | Maximum continuous output current | |
| Thermal Shutdown Temperature | TSD | 160 | °C | Temperature at which the device shuts down | ||
| Operating Temperature | TOPR | -40 | 125 | °C | Operating temperature range | |
| Storage Temperature | TSTG | -65 | 150 | °C | Storage temperature range |
Instructions for Using UC3901DW
Input Voltage (VIN):
- Ensure the input voltage is within the specified range (4.5V to 40V) to avoid damage or improper operation.
Output Voltage (VOUT):
- The output voltage can be adjusted using external resistors. Use the formula: [ V_ = V_ left(1 + fracright) ]
- Where ( V_ ) is the internal reference voltage (1.23V), and ( R_1 ) and ( R_2 ) are the resistors connected to the feedback pin.
Quiescent Current (IQ):
- The quiescent current is typically 1.2mA. This is the current consumed by the regulator when there is no load.
Load Regulation:
- The load regulation is 0.1% per ampere. This means the output voltage will change by 0.1% for each additional ampere of load current.
Line Regulation:
- The line regulation is 0.01% per volt. This means the output voltage will change by 0.01% for each additional volt of input voltage.
Dropout Voltage (VDROPOUT):
- The dropout voltage is 1.2V. Ensure that the input voltage is at least 1.2V higher than the desired output voltage to maintain regulation.
Thermal Shutdown:
- The device will shut down if the temperature exceeds 160°C to prevent damage. Ensure proper heat dissipation.
Operating and Storage Temperature:
- The operating temperature range is -40°C to 125°C, and the storage temperature range is -65°C to 150°C.
Maximum Output Current (IOUT):
- The maximum continuous output current is 3A, but it can typically provide up to 1.5A without overheating under normal conditions.
Circuit Design:
- Use appropriate capacitors for input and output filtering to stabilize the voltage and reduce ripple.
- Place the input capacitor close to the VIN and GND pins to minimize noise.
- Use a low-ESR (Equivalent Series Resistance) capacitor for the output to improve transient response and stability.
Protection Circuits:
- Implement overvoltage and overcurrent protection circuits to safeguard the device and connected components.
PCB Layout:
- Follow good PCB layout practices to ensure optimal performance and reliability. Keep traces short and wide, especially for high-current paths.
Inquiry - UC3901DW
