LM3503ITL-25/NOPB

Product Overview

Category

The LM3503ITL-25/NOPB belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Maximum Output Current: 500mA
• Dropout Voltage: 200mV at 100mA
• Low Quiescent Current: 45µA (typical)
• Package Type: SOT-23-5
• Operating Temperature Range: -40°C to +85°C

Packaging/Quantity

The LM3503ITL-25/NOPB is available in a SOT-23-5 package. It is typically sold in reels containing a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Maximum Output Current: 500mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 45µA (typical)
• Shutdown Current: 0.1µA (typical)
• Line Regulation: ±0.5% (typical)
• Load Regulation: ±0.5% (typical)
• Ripple Rejection: 70dB (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM3503ITL-25/NOPB has a total of five pins:

1. VIN: Input voltage pin.
2. GND: Ground reference pin.
3. EN: Enable pin for turning the regulator on/off.
4. FB: Feedback pin for setting the output voltage.
5. VOUT: Output voltage pin.

Functional Features

• Low dropout voltage ensures efficient regulation even with low input voltages.
• Wide input voltage range allows compatibility with various power sources.
• High output current capability enables driving power-hungry loads.
• Low quiescent current minimizes power consumption during standby or idle modes.
• Excellent line and load regulation provide stable output voltage under varying conditions.
• Good ripple rejection reduces noise in the output voltage.

Advantages

• Compact SOT-23-5 package offers space-saving benefits.
• Wide input voltage range makes it suitable for a wide range of applications.
• Low dropout voltage ensures efficient operation even with low input voltages.
• High output current capability allows for driving power-hungry loads.
• Low quiescent current minimizes power consumption during standby or idle modes.

Disadvantages

• Limited maximum output current compared to higher-rated regulators.
• SOT-23-5 package may require additional thermal considerations for high-power applications.

Working Principles

The LM3503ITL-25/NOPB 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. When the output voltage drops below the desired level, the regulator increases the pass transistor's conduction to maintain the set output voltage.

Detailed Application Field Plans

The LM3503ITL-25/NOPB can be used in various applications, including but not limited to:

1. Battery-powered devices: Portable electronics, handheld instruments, etc.
2. IoT devices: Sensors, wearable devices, etc.
3. Automotive electronics: Infotainment systems, lighting controls, etc.
4. Industrial equipment: Control systems, measurement devices, etc.

Detailed and Complete Alternative Models

1. LM317: A popular general-purpose linear voltage regulator with adjustable output voltage.
2. LM1117: Low dropout voltage regulator available in various fixed output voltage options.
3. LT1086: High current, low dropout linear regulator with adjustable output voltage.

These alternative models offer similar functionality and can be considered as substitutes for the LM3503ITL-25/NOPB depending on specific requirements.

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