ADP125ACPZ-R7

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - Low Quiescent Current - High PSRR (Power Supply Rejection Ratio) - Adjustable Output Voltage - Thermal Shutdown Protection

Package: 8-Lead LFCSP (Lead Frame Chip Scale Package)

Essence: The ADP125ACPZ-R7 is a voltage regulator IC designed to provide a stable output voltage for various electronic devices.

Packaging/Quantity: The ADP125ACPZ-R7 is available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 2.3V to 5.5V
• Output Voltage Range: 0.8V to VIN
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 20µA
• PSRR: 70dB at 1kHz
• Output Current: Up to 200mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ADP125ACPZ-R7 has the following pin configuration:

```

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| | --| VOUT | --| GND | --| FB | --| EN | --| VIN | --| BYPASS | --| NC | |___________| ```

Functional Features

1. Low Dropout Voltage: The ADP125ACPZ-R7 exhibits a low dropout voltage, ensuring efficient power conversion even when the input voltage is close to the desired output voltage.

2. Low Quiescent Current: With a quiescent current of only 20µA, the ADP125ACPZ-R7 minimizes power consumption in standby or idle modes, extending battery life.

3. High PSRR: The IC has a high Power Supply Rejection Ratio of 70dB at 1kHz, providing excellent noise rejection and ensuring a stable output voltage even in noisy environments.

4. Adjustable Output Voltage: The output voltage can be adjusted from 0.8V to the input voltage (VIN) using an external resistor divider network, allowing flexibility in various applications.

5. Thermal Shutdown Protection: The ADP125ACPZ-R7 incorporates thermal shutdown protection, which prevents the IC from overheating by disabling the output when the temperature exceeds a certain threshold.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion. - Low quiescent current extends battery life. - High PSRR provides excellent noise rejection. - Adjustable output voltage for flexibility. - Thermal shutdown protection prevents overheating.

Disadvantages: - Limited output current capacity (up to 200mA).

Working Principles

The ADP125ACPZ-R7 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage to control the pass transistor's conduction. By adjusting the resistance in the feedback network, the desired output voltage can be set.

When the input voltage (VIN) is higher than the desired output voltage, the pass transistor conducts, allowing current to flow from VIN to the output (VOUT). If the input voltage drops below the desired output voltage, the pass transistor reduces its conduction, maintaining a stable output voltage.

Detailed Application Field Plans

The ADP125ACPZ-R7 is suitable for a wide range of applications, including but not limited to: - Battery-powered devices - Portable consumer electronics - Industrial sensors - Medical devices - Automotive electronics

Detailed and Complete Alternative Models

1. ADP125ACPZ-R2: Similar to ADP125ACPZ-R7, but with a different package (10-Lead MSOP).
2. ADP125ACPZ-R8: Improved version with lower dropout voltage and higher PSRR.
3. ADP125ACPZ-R9: Higher output current capacity (up to 500mA) for demanding applications.

These alternative models offer similar functionality to the ADP125ACPZ-R7 but may have variations in package type, performance, or additional features.

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