ADP2138ACBZ-2.5-R7

Overview

Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: Low Dropout, High Efficiency
Package: SOT-23-6
Essence: Step-Down DC-DC Converter
Packaging/Quantity: Tape & Reel / 3000 units per reel

Specifications

• Input Voltage Range: 2.3V to 5.5V
• Output Voltage: 2.5V
• Output Current: Up to 600mA
• Dropout Voltage: 200mV at 600mA
• Quiescent Current: 45µA
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ADP2138ACBZ-2.5-R7 has a total of six pins arranged as follows:

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

Functional Features

1. Low Dropout Voltage: The ADP2138ACBZ-2.5-R7 exhibits a low dropout voltage of only 200mV at a maximum output current of 600mA, ensuring efficient power conversion.
2. High Efficiency: With a switching frequency of 1.2MHz, this voltage regulator achieves high efficiency, minimizing power losses and maximizing battery life in portable devices.
3. Wide Input Voltage Range: The IC accepts input voltages ranging from 2.3V to 5.5V, making it suitable for various applications.
4. Quiescent Current: The quiescent current of 45µA ensures minimal power consumption during standby or low-load conditions.
5. Thermal Shutdown and Current Limit Protection: The ADP2138ACBZ-2.5-R7 incorporates built-in thermal shutdown and current limit protection mechanisms, safeguarding the IC and connected devices from potential damage.

Advantages

• Small form factor and lightweight package (SOT-23-6) make it suitable for space-constrained applications.
• High efficiency results in reduced power dissipation and longer battery life.
• Wide input voltage range allows compatibility with different power sources.
• Low dropout voltage ensures stable output even under varying load conditions.
• Integrated protection features enhance reliability and prevent damage to the IC and connected components.

Disadvantages

• Limited output current of up to 600mA may not be sufficient for high-power applications.
• SOT-23-6 package may require additional heat sinking for improved thermal performance in certain scenarios.

Working Principles

The ADP2138ACBZ-2.5-R7 is a step-down DC-DC converter that utilizes a synchronous buck topology. It converts a higher input voltage into a regulated lower output voltage by controlling the duty cycle of an internal switch. The integrated control circuitry adjusts the switch's on/off time to maintain a constant output voltage of 2.5V, regardless of input voltage fluctuations or load variations. This regulation is achieved through feedback provided by the FB pin, which compares the actual output voltage with a reference voltage.

Detailed Application Field Plans

The ADP2138ACBZ-2.5-R7 is widely used in various portable and battery-powered applications, including but not limited to: - Mobile phones and smartphones - Tablets and laptops - Portable media players - Digital cameras - Wireless communication devices - Wearable electronics - IoT devices

Alternative Models

1. ADP2138ACPZ-2.5-R7: Similar to ADP2138ACBZ-2.5-R7, but in a different package (LFCSP-8).
2. ADP2138ACBZ-3.3-R7: Provides an output voltage of 3.3V instead of 2.5V.
3. ADP2138ACPZ-1.8-R7: Offers an output voltage of 1.8V for specific low-power applications.

These alternative models provide similar functionality and characteristics, allowing designers to choose the most suitable option based on their specific requirements.

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