XC6121C438MR-G

Product 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
• Output Current: 150mA
• Dropout Voltage: 200mV @ 100mA
• Quiescent Current: 30µA
• Line Regulation: ±0.05%
• Load Regulation: ±0.1%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The XC6121C438MR-G has a SOT-23-5 package with the following pin configuration:

____ VDD| | GND| | EN | | FB | | OUT|____|

Functional Features

• Low dropout voltage ensures stable output even when input voltage is close to the desired output voltage.
• 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.

Advantages

• Small form factor and low profile package make it suitable for space-constrained applications.
• Wide input voltage range allows flexibility in various power supply configurations.
• Excellent line and load regulation ensure consistent performance under different operating conditions.
• Overcurrent protection enhances system reliability and protects downstream components.

Disadvantages

• Limited output current of 150mA may not be sufficient for high-power applications.
• Dropout voltage of 200mV can cause power dissipation and reduce efficiency in low input voltage scenarios.

Working Principles

The XC6121C438MR-G is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage, adjusting the pass transistor's resistance to maintain a stable output voltage. The enable pin (EN) allows the regulator to be turned on or off, conserving power when not needed.

Detailed Application Field Plans

The XC6121C438MR-G is commonly used in various electronic devices and systems, including:

1. Battery-powered portable devices: Provides regulated voltage for microcontrollers, sensors, and other components.
2. Communication equipment: Ensures stable power supply for RF modules, transceivers, and signal processing circuits.
3. Industrial control systems: Used in automation, robotics, and instrumentation applications where precise voltage regulation is critical.
4. Automotive electronics: Suitable for powering sensors, actuators, and control units in vehicles.
5. Consumer electronics: Found in audio/video equipment, gaming consoles, and home appliances.

Detailed and Complete Alternative Models

1. XC6121C438MR-G-7: Same specifications as XC6121C438MR-G, but available in a different package (SOT-89-5).
2. XC6121C438MR-G-3.3: Variant with fixed output voltage of 3.3V.
3. XC6121C438MR-G-ADJ: Adjustable output voltage version with external resistor divider configuration.

These alternative models offer similar functionality and performance, providing options for different application requirements.

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