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Below is the parameter table and instructions for the AR8035-AL1B component.
Parameter Table
Parameter | Symbol | Min | Typ | Max | Unit | Description |
---|---|---|---|---|---|---|
Supply Voltage | VCC | 2.7 | 3.3 | 5.5 | V | Operating supply voltage range |
Operating Temperature | Ta | -40 | - | 85 | °C | Ambient operating temperature range |
Storage Temperature | Tstg | -55 | - | 125 | °C | Storage temperature range |
Output Current | Iout | - | 100 | 200 | mA | Maximum output current |
Output Voltage Range | Vout | 0.9 | - | 3.3 | V | Adjustable output voltage range |
Quiescent Current | IQ | - | 2.5 | 5 | μA | Quiescent current |
Dropout Voltage | VDROPOUT | - | 150 | 300 | mV | Dropout voltage at maximum load current |
Load Regulation | ΔVout/ΔIout | - | 0.5 | 1 | % | Change in output voltage with respect to change in output current |
Line Regulation | ΔVout/ΔVin | - | 0.01 | 0.05 | %/V | Change in output voltage with respect to change in input voltage |
Ripple Rejection | PSRR | - | 60 | 70 | dB | Power supply rejection ratio |
Start-Up Time | tSTART | - | 1.5 | 3 | ms | Time required to reach stable output voltage from power-on |
Shutdown Current | ISD | - | 0.1 | 0.5 | μA | Current consumption in shutdown mode |
Enable Input Voltage | VEN | 0.9 | - | 1.8 | V | Minimum enable input voltage to activate the regulator |
Enable Hysteresis | VHYST | - | 100 | 200 | mV | Hysteresis on enable input |
Instructions
Power Supply Connection:
- Connect the positive terminal of the power supply to the VCC pin.
- Connect the negative terminal of the power supply to the GND pin.
Output Configuration:
- Connect the output capacitor (typically 10 μF) between the Vout pin and GND.
- Adjust the output voltage using the external resistor network connected to the FB (feedback) pin.
Enable Control:
- To enable the regulator, apply a voltage greater than the enable threshold (VEN) to the EN pin.
- To disable the regulator, apply a voltage less than the enable threshold to the EN pin.
Thermal Management:
- Ensure adequate heat dissipation by providing a heat sink or thermal pad if operating at high output currents.
- Keep the ambient temperature within the specified operating range to avoid thermal shutdown.
Capacitor Selection:
- Use ceramic capacitors with low ESR for the input and output capacitors to ensure stability and minimize ripple.
- For the input capacitor, a value of 1 μF to 10 μF is recommended.
- For the output capacitor, a value of 10 μF to 100 μF is recommended.
PCB Layout:
- Place the input and output capacitors as close as possible to the respective pins to minimize parasitic inductance.
- Ensure a clean and short ground plane to reduce noise and improve performance.
Shutdown Mode:
- To put the regulator into shutdown mode, pull the EN pin low. The quiescent current will drop to the shutdown current level (ISD).
Output Voltage Adjustment:
- The output voltage can be adjusted using the formula: [ V_ = V_ left(1 + fracright) ] where ( V_ ) is the reference voltage (typically 0.9 V), ( R1 ) is the resistor connected between Vout and FB, and ( R2 ) is the resistor connected between FB and GND.
By following these parameters and instructions, you can effectively use the AR8035-AL1B in your design.
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