S-1312C21-A4T2U3

Basic Information Overview

Category: Electronic Component
Use: Voltage Regulator
Characteristics: High Efficiency, Low Dropout, Low Quiescent Current
Package: SOT-23-5
Essence: Linear Voltage Regulator
Packaging/Quantity: Tape and Reel / 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Range: 1.2V to 5.5V
• Maximum Output Current: 150mA
• Dropout Voltage: 160mV (typical) at 100mA
• Quiescent Current: 30μA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.2% (typical)
• Ripple Rejection Ratio: 70dB (typical) at 1kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The S-1312C21-A4T2U3 voltage regulator is a five-pin device with the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. CE: Enable Control
4. VOUT: Output Voltage
5. NC: No Connection

Functional Features

• High efficiency with low dropout voltage ensures minimal power dissipation.
• Low quiescent current allows for extended battery life in portable applications.
• Excellent line and load regulation provide stable output voltage under varying conditions.
• Built-in overcurrent protection safeguards the device and connected circuitry.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption. - Low dropout voltage enables operation with low input voltages. - Compact SOT-23-5 package allows for space-saving designs. - Wide operating temperature range suits various environmental conditions.

Disadvantages: - Limited maximum output current may restrict usage in high-power applications. - Not suitable for applications requiring adjustable output voltage.

Working Principles

The S-1312C21-A4T2U3 is a linear voltage regulator that maintains a stable output voltage regardless of variations in the input voltage or load conditions. It achieves this by using a pass transistor to regulate the voltage drop across it. The enable control pin (CE) allows for easy on/off control of the regulator, conserving power when not needed.

Detailed Application Field Plans

The S-1312C21-A4T2U3 is commonly used in battery-powered devices, such as portable electronics, IoT devices, and wireless sensors. Its low quiescent current and high efficiency make it ideal for applications where power consumption is critical. Some specific application areas include:

1. Wearable Devices: Powering small sensors, displays, and microcontrollers in smartwatches, fitness trackers, etc.
2. Mobile Devices: Regulating voltage for audio amplifiers, camera modules, and other components in smartphones and tablets.
3. IoT Applications: Providing stable voltage for sensors, actuators, and communication modules in connected devices.
4. Industrial Equipment: Powering control circuits, sensors, and communication interfaces in automation systems.

Detailed and Complete Alternative Models

1. S-1312B18-A4T2U3: Similar specifications but with a lower dropout voltage.
2. S-1312D33-A4T2U3: Higher maximum output current and wider input voltage range.
3. S-1312E28-A4T2U3: Adjustable output voltage version with similar characteristics.

These alternative models offer flexibility in choosing the most suitable voltage regulator based on specific application requirements.

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