LP3921SQ/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, low power consumption
• Package: 16-pin QFN
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to 3.6V
• Maximum Output Current: 1.5A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LP3921SQ/NOPB has a 16-pin QFN package with the following pin configuration:

1. VIN: Input voltage
2. EN: Enable pin
3. FB: Feedback pin
4. GND: Ground
5. PGND: Power ground
6. SW: Switching node
7. SW: Switching node
8. SW: Switching node
9. SW: Switching node
10. VOUT: Output voltage
11. VOUT: Output voltage
12. VOUT: Output voltage
13. VOUT: Output voltage
14. VOUT: Output voltage
15. VOUT: Output voltage
16. VOUT: Output voltage

Functional Features

• High efficiency voltage regulation
• Low dropout voltage
• Overcurrent protection
• Thermal shutdown protection
• Soft start functionality
• Adjustable output voltage

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption
• Wide input voltage range allows for versatile applications
• Compact package size saves board space
• Overcurrent and thermal protection ensure device safety
• Soft start feature prevents inrush current

Disadvantages

• Limited maximum output current of 1.5A
• Operating temperature range may not be suitable for extreme environments

Working Principles

The LP3921SQ/NOPB is a voltage regulator IC that converts an input voltage within the range of 2.7V to 5.5V to a regulated output voltage between 0.6V and 3.6V. It achieves this by utilizing a switching regulator topology, which provides high efficiency power conversion. The device incorporates various protection features such as overcurrent and thermal shutdown to ensure safe operation.

Detailed Application Field Plans

The LP3921SQ/NOPB is commonly used in applications where efficient power management is required. Some typical application fields include:

1. Portable electronic devices: Smartphones, tablets, portable media players
2. Wearable devices: Smartwatches, fitness trackers
3. IoT devices: Sensors, smart home devices
4. Battery-powered systems: Wireless communication modules, handheld instruments

Detailed and Complete Alternative Models

1. LM317T: Adjustable voltage regulator with higher maximum output current (up to 1.5A)
2. LT1084CP-5: Fixed output voltage regulator with higher maximum output current (up to 5A)
3. TPS54332: Synchronous buck converter with adjustable output voltage and higher efficiency

Note: This is not an exhaustive list, and there are several alternative models available in the market.

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