S-1009C21I-I4T1U

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management IC
• Characteristics: Low Dropout Regulator (LDO)
• Package: SOT-23-5
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.0V to 6.0V
• Output Voltage Range: 1.2V to 5.5V
• Maximum Output Current: 100mA
• Dropout Voltage: 150mV (typical) at 100mA
• Quiescent Current: 30μA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.3% (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The S-1009C21I-I4T1U has a total of five pins arranged in the following configuration:

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

Functional Features

• Low dropout voltage ensures stable output even with low input voltage.
• Excellent line and load regulation for precise voltage control.
• Ultra-low quiescent current prolongs battery life in portable devices.
• Built-in overcurrent protection safeguards the circuit from damage.
• Thermal shutdown feature prevents overheating.

Advantages

• Wide input voltage range allows compatibility with various power sources.
• Small package size enables space-saving designs.
• Low dropout voltage minimizes power dissipation.
• High accuracy and stability ensure reliable performance.
• Low quiescent current extends battery life.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• No adjustable output voltage option available.
• NC pin may require additional attention during PCB layout.

Working Principles

The S-1009C21I-I4T1U is a low dropout voltage regulator that maintains a stable output voltage despite fluctuations in the input voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor to regulate the output voltage within the specified range. The enable control pin allows the device to be turned on or off as required.

Detailed Application Field Plans

The S-1009C21I-I4T1U is commonly used in various battery-powered applications, such as: - Mobile phones - Portable media players - Digital cameras - Wireless headsets - Handheld gaming devices

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the S-1009C21I-I4T1U include: - S-1009C21I-M5T1U - S-1009C21I-I6T1U - S-1009C21I-I3T1U - S-1009C21I-I2T1U

These models have comparable specifications and pin configurations, providing flexibility in design choices.

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