S-1312A21-A4T1U3

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, High Accuracy, Low Quiescent Current
• Package: SOT-23-5
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV @ 100mA
• Output Current: 150mA
• Quiescent Current: 30µA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The S-1312A21-A4T1U3 has a total of five pins arranged as follows: 1. VIN: Input voltage pin 2. GND: Ground pin 3. CE: Chip enable pin 4. VOUT: Output voltage pin 5. NC: No connection pin

Functional Features

• Low dropout voltage ensures stable output even with small input-output voltage differentials.
• High accuracy provides precise output voltage regulation.
• Low quiescent current minimizes power consumption in standby mode.
• Built-in overcurrent protection safeguards the circuit from excessive current flow.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages

• Compact SOT-23-5 package allows for space-efficient designs.
• Wide input voltage range enables versatile applications.
• Excellent line and load regulation ensure stable performance under varying conditions.
• Low quiescent current extends battery life in portable devices.
• Overcurrent and thermal shutdown protection enhance system reliability.

Disadvantages

• Limited output current of 150mA may not be sufficient for high-power applications.
• Dropout voltage of 200mV may cause a slight voltage drop across the regulator.

Working Principles

The S-1312A21-A4T1U3 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage from the output, adjusting the pass transistor's resistance to maintain a stable output voltage. The dropout voltage is the minimum voltage difference required between the input and output for the regulator to function correctly.

Detailed Application Field Plans

The S-1312A21-A4T1U3 is commonly used in various electronic devices, including: - Battery-powered devices such as smartphones, tablets, and portable media players. - IoT (Internet of Things) devices requiring low power consumption. - Automotive electronics for voltage regulation in vehicle systems. - Industrial equipment and control systems. - Consumer electronics like digital cameras, audio players, and handheld gaming consoles.

Detailed and Complete Alternative Models

1. S-1312B21-A4T1U3: Similar specifications but with an adjustable output voltage feature.
2. S-1312C21-A4T1U3: Higher output current capability of 300mA.
3. S-1312D21-A4T1U3: Lower quiescent current of 10µA for ultra-low power applications.

These alternative models provide options based on specific requirements and design considerations.

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