The "ADP1763ACPZ-R7" is part of Analog Devices. This specific part is a Low Dropout (LDO) Linear Regulator. The device is typically used for providing a stable voltage supply to Power sensitive circuits. It operates with high efficiency, low noise, and low dropout voltage.
Pin Function Specifications and Circuit Principle:
The ADP1763ACPZ-R7 comes in a 3mm x 3mm LFCSP (Lead Frame Chip Scale Package), with 12 pins. Below is a detailed explanation of the pin functions for the package.
Pin Number Pin Name Pin Function 1 IN Input Voltage: This is where the unregulated voltage input is applied. It typically ranges from 2.3V to 5.5V. 2 GND Ground Pin: Common reference ground for the IC. All circuit ground connections should be connected to this pin. 3 FB Feedback Pin: Connects to an external resistor divider to set the output voltage. 4 EN Enable Pin: A logic high (typically > 1.2V) enables the regulator, and a logic low disables it. 5 OUT Output Voltage: Provides the regulated output voltage. 6 NC No Connect: This pin is not connected internally. It's typically used for mechanical purposes only. 7 PG Power Good: This is an open-drain output that indicates when the output voltage is within regulation. 8 NC No Connect: Similar to pin 6, not connected internally. 9 NC No Connect: No internal connection. 10 NC No Connect: No internal connection. 11 NC No Connect: No internal connection. 12 NC No Connect: No internal connection.Detailed Explanation of Pin Functions:
Pin 1: IN (Input Voltage) This pin is where the unregulated input voltage is supplied to the regulator. It should be connected to the source voltage and should fall within the specified input voltage range for the device to operate correctly (2.3V to 5.5V). The maximum input voltage limit for the ADP1763 is 5.5V.
Pin 2: GND (Ground) This pin serves as the ground for the ADP1763 regulator. All external circuitry that needs to share a common ground with the IC must connect to this pin.
Pin 3: FB (Feedback) This pin is used to set the output voltage. It connects to an external resistive divider network that determines the output voltage. The voltage at this pin should match the internal reference voltage to maintain the correct output voltage. This pin is vital in adjusting the regulator’s output.
Pin 4: EN (Enable) The enable pin is used to turn the regulator on or off. When a high logic level (> 1.2V) is applied to this pin, the regulator will operate normally. If this pin is pulled low (< 0.4V), the regulator is disabled, and the output will be turned off.
Pin 5: OUT (Output Voltage) This is the regulated output of the ADP1763. The voltage at this pin is set by the feedback network (Pin 3). The output voltage is stable and can be used to power other sensitive devices.
Pins 6-12: NC (No Connect) These pins do not have any internal electrical connection in the IC. They may be used for mechanical purposes or for additional grounding and should not be used in the circuit.
FAQ (Frequently Asked Questions):
Q: What is the typical input voltage range for the ADP1763ACPZ-R7? A: The typical input voltage range is from 2.3V to 5.5V.
Q: How does the feedback mechanism work in the ADP1763ACPZ-R7? A: The feedback mechanism allows an external resistor divider to set the output voltage. The voltage at the feedback pin must match the internal reference voltage for regulation.
Q: What should be the logic level to enable the ADP1763ACPZ-R7? A: The enable pin should be pulled high (typically > 1.2V) to enable the regulator.
Q: Can the output voltage of the ADP1763ACPZ-R7 be adjusted? A: Yes, the output voltage can be adjusted using an external resistor divider connected to the feedback pin.
Q: Is there an overcurrent protection in the ADP1763ACPZ-R7? A: Yes, the ADP1763 includes overcurrent protection to protect against excessive current conditions.
Q: How do I disable the ADP1763ACPZ-R7 regulator? A: To disable the regulator, pull the enable pin low (typically < 0.4V).
Q: What is the maximum output current of the ADP1763ACPZ-R7? A: The ADP1763ACPZ-R7 can provide a maximum output current of 600mA.
Q: What is the quiescent current for the ADP1763ACPZ-R7? A: The typical quiescent current is about 35µA in a no-load condition.
Q: What happens if the input voltage exceeds the maximum rating of 5.5V? A: Exceeding the maximum input voltage can damage the internal circuitry and lead to failure.
Q: Is thermal protection implemented in the ADP1763ACPZ-R7? A: Yes, thermal protection is built-in to prevent overheating and damage to the IC.
Q: What is the output voltage tolerance of the ADP1763ACPZ-R7? A: The output voltage tolerance is typically ±2% over the specified temperature range.
Q: How do I ensure stable output voltage under varying load conditions? A: To ensure stable output, use appropriate external capacitor s as recommended in the datasheet.
Q: Can the ADP1763ACPZ-R7 be used for automotive applications? A: Yes, the ADP1763 is suitable for automotive applications where low dropout and stable regulation are required.
Q: What kind of package does the ADP1763ACPZ-R7 come in? A: The ADP1763ACPZ-R7 comes in a 12-lead LFCSP (Lead Frame Chip Scale Package).
Q: What is the power good pin used for? A: The power good pin provides an indication that the output voltage is within regulation.
Q: Can the ADP1763ACPZ-R7 operate with a low dropout voltage? A: Yes, it has a very low dropout voltage, typically 40mV at 600mA output current.
Q: What happens if I leave the NC pins unconnected? A: The NC pins do not affect the performance of the device, so they can be left unconnected.
Q: Is there any external circuitry required to use the ADP1763ACPZ-R7? A: Yes, external capacitors are required for stable operation, as specified in the datasheet.
Q: How do I calculate the output voltage for the ADP1763ACPZ-R7? A: The output voltage is calculated using the resistor divider connected to the feedback pin, following the formula: (V{out} = V{ref} \times (1 + R2 / R1)).
Q: Can the ADP1763ACPZ-R7 be used for powering processors or FPGA s? A: Yes, the ADP1763 is suitable for powering low voltage processors and FPGAs requiring a stable and low-noise voltage source.
This completes the full explanation and FAQ for the ADP1763ACPZ-R7, including all pin functions and circuit principles.
