UCC3921D/81143

Product Overview

Category

UCC3921D/81143 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in electronic devices for voltage regulation and power management.

Characteristics

• Integrated circuit
• Voltage regulation and power management capabilities
• Compact package size
• High efficiency
• Low power consumption

Package

UCC3921D/81143 is available in a small outline package (SOP) or dual in-line package (DIP), depending on the manufacturer's specifications.

Essence

The essence of UCC3921D/81143 lies in its ability to regulate voltage and manage power efficiently, making it an essential component in various electronic devices.

Packaging/Quantity

The product is typically packaged in reels or tubes, with quantities varying based on customer requirements. Common packaging options include 1000 units per reel or tube.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.8V to 3.6V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOP-8/DIP-8

Detailed Pin Configuration

The UCC3921D/81143 IC has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for voltage regulation
4. EN: Enable pin for turning the IC on/off
5. COMP: Compensation pin for stability control
6. SS: Soft-start pin for gradual power-up
7. PGND: Power ground reference
8. SW: Switching node for power regulation

Functional Features

• Voltage regulation: The UCC3921D/81143 ensures a stable output voltage within the specified range, even with varying input voltages.
• Power management: It efficiently manages power consumption, optimizing energy usage in electronic devices.
• Soft-start function: The soft-start pin allows for a gradual increase in power to prevent sudden surges or voltage spikes.
• Enable/disable control: The EN pin enables or disables the IC, providing flexibility in power management.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption.
• Compact package size allows for easy integration into various electronic devices.
• Wide input and output voltage ranges provide versatility in applications.
• Soft-start feature prevents voltage spikes during power-up.

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power applications.
• Temperature range limited to -40°C to +85°C, which may restrict usage in extreme environments.

Working Principles

The UCC3921D/81143 operates based on a switching regulator principle. It uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the switching frequency accordingly to maintain a stable output voltage. The integrated circuit controls the power flow by switching the power transistor on and off rapidly.

Detailed Application Field Plans

The UCC3921D/81143 finds applications in various electronic devices, including but not limited to: - Mobile phones - Tablets - Portable gaming consoles - Battery-powered devices - IoT devices - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to UCC3921D/81143 are: - LM2576-ADJ - LT1084CP-5 - TPS5430DDAR - MAX5033DASA

These alternative models can be considered based on specific requirements and compatibility with the target application.

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