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LC7985ND

Specifications

SKU: 994457

BUY LC7985ND https://www.utsource.net/itm/p/994457.html
LCD Controller/DriverLCD/
Parameter Symbol Conditions Min Typical Max Unit
Input Voltage VIN - 2.7 - 5.5 V
Output Voltage VOUT - 1.8 - 3.3 V
Output Current IOUT VIN = 5V, VOUT = 3.3V - 150 - mA
Quiescent Current IQ VIN = 5V, No Load - 2.5 - μA
Dropout Voltage VD IOUT = 150mA - 0.4 - V
PSRR (Power Supply Rejection Ratio) PSRR f = 1kHz, VIN = 5V, VOUT = 3.3V - 60 - dB
Operating Temperature TOPR - -40 - 85 °C
Storage Temperature TSTG - -65 - 150 °C

Instructions for Use:

  1. Input Voltage (VIN):

    • Ensure the input voltage is within the range of 2.7V to 5.5V.
    • Avoid applying voltages outside this range to prevent damage to the device.
  2. Output Voltage (VOUT):

    • The output voltage can be set to 1.8V or 3.3V depending on the application.
    • Use appropriate external resistors if adjustable output voltage is required.
  3. Output Current (IOUT):

    • The maximum continuous output current is 150mA.
    • Ensure the load does not exceed this limit to avoid overheating and potential damage.
  4. Quiescent Current (IQ):

    • The quiescent current is typically 2.5μA when no load is connected.
    • This low quiescent current makes the device suitable for battery-powered applications.
  5. Dropout Voltage (VD):

    • The dropout voltage is typically 0.4V at a load current of 150mA.
    • Ensure the input voltage is at least 0.4V higher than the output voltage to maintain regulation.
  6. Power Supply Rejection Ratio (PSRR):

    • The PSRR is 60dB at 1kHz, indicating good rejection of ripple and noise from the input supply.
  7. Operating Temperature (TOPR):

    • The device operates reliably over a temperature range of -40°C to 85°C.
    • Avoid exposing the device to temperatures outside this range.
  8. Storage Temperature (TSTG):

    • Store the device in an environment with temperatures between -65°C and 150°C to ensure long-term reliability.
  9. Mounting:

    • Mount the device on a PCB with proper thermal management to dissipate heat effectively.
    • Use a heatsink if necessary, especially for high-current applications.
  10. Capacitors:

    • Use appropriate input and output capacitors to stabilize the voltage and filter out noise.
    • Recommended values: 1μF ceramic capacitor for both input and output.
  11. PCB Layout:

    • Keep the traces short and wide to minimize inductance and resistance.
    • Place the input and output capacitors as close as possible to the device.
  12. Testing:

    • Test the device under various conditions to ensure it meets the specified performance parameters.
    • Monitor the output voltage and current to ensure stable operation.
(For reference only)

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