LM3525M-H

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Short-circuit current limit

Package: SOT-23-5

Essence: The LM3525M-H is a voltage regulator IC designed to provide a stable output voltage for various electronic devices.

Packaging/Quantity: The LM3525M-H is available in a SOT-23-5 package. It is typically sold in reels of 3000 units.

Specifications

The LM3525M-H has the following specifications:

• Input Voltage Range: 2.5V to 6V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV at 150mA
• Output Current: Up to 500mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LM3525M-H has five pins arranged as follows:

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Pin 1: Enable (EN) Pin 2: Feedback (FB) Pin 3: Ground (GND) Pin 4: Output (OUT) Pin 5: Input (IN)

Functional Features

• Low Dropout Voltage: The LM3525M-H has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With a maximum output current of 500mA, the LM3525M-H can power a wide range of electronic devices.
• Adjustable Output Voltage: The output voltage can be adjusted using an external resistor divider connected to the FB pin.
• Thermal Shutdown Protection: The LM3525M-H includes thermal shutdown protection, which prevents the IC from overheating and damaging itself.
• Short-Circuit Current Limit: In the event of a short circuit, the LM3525M-H limits the output current to protect the device and prevent further damage.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation even with low input voltages. - High output current capability allows for powering various electronic devices. - Adjustable output voltage provides flexibility in different applications. - Thermal shutdown protection prevents damage due to excessive heat. - Short-circuit current limit protects the device and prevents further damage.

Disadvantages: - Limited input voltage range (2.5V to 6V). - Quiescent current of 75µA may not be suitable for ultra-low power applications.

Working Principles

The LM3525M-H is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It compares the feedback voltage at the FB pin with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

When the enable pin (EN) is high, the regulator is enabled, and the output voltage is regulated based on the feedback voltage. When the enable pin is low, the regulator is disabled, and the output voltage is disconnected from the input.

Detailed Application Field Plans

The LM3525M-H can be used in various applications, including but not limited to: 1. Battery-powered devices 2. Portable audio players 3. Mobile phones 4. Digital cameras 5. Wireless communication devices

Detailed and Complete Alternative Models

Some alternative models to the LM3525M-H include: 1. LM1117-ADJ: Adjustable voltage regulator with higher output current capability. 2. LM317T: Adjustable voltage regulator with a wider input voltage range. 3. LP2985-33DBVR: Low dropout voltage regulator with fixed 3.3V output voltage.

These alternative models offer different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

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