RN4905FE,LF(CB) Product Overview

Product Category and Basic Information

The RN4905FE,LF(CB) belongs to the category of voltage regulators. It is commonly used to regulate voltage in electronic circuits, ensuring a stable and consistent power supply. The characteristics of this product include its compact size, high efficiency, and low dropout voltage. It is typically packaged in a small outline integrated circuit (SOIC) package and is available in various quantities.

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage: Adjustable from 1.2V to 5.5V
• Maximum Output Current: 150mA
• Dropout Voltage: 300mV at 100mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The RN4905FE,LF(CB) features a standard 5-pin configuration: 1. VIN (Input Voltage) 2. GND (Ground) 3. VOUT (Output Voltage) 4. ADJ (Adjustment Pin) 5. BYP (Bypass Capacitor Pin)

Functional Features

• Low Dropout Voltage: Ensures efficient regulation even when the input voltage is only slightly higher than the output voltage.
• Adjustable Output: Allows for flexibility in setting the desired output voltage within the specified range.
• Low Quiescent Current: Minimizes power consumption in standby or idle modes.

Advantages and Disadvantages

Advantages

• Small form factor
• High efficiency
• Wide input voltage range

Disadvantages

• Limited maximum output current
• Sensitive to external noise and fluctuations

Working Principles

The RN4905FE,LF(CB) utilizes a feedback control mechanism to maintain a constant output voltage despite variations in the input voltage and load conditions. This is achieved through the use of internal circuitry that adjusts the pass transistor to regulate the output voltage.

Detailed Application Field Plans

The RN4905FE,LF(CB) is commonly used in portable electronic devices such as smartphones, tablets, and portable media players. It is also suitable for battery-powered applications where a stable voltage supply is essential for proper operation.

Detailed and Complete Alternative Models

• RN4905FE,LF: Similar specifications and features, but without the conformal coating option.
• LM2937ET-5.0/NOPB: Alternative voltage regulator with comparable performance and pin compatibility.

In conclusion, the RN4905FE,LF(CB) voltage regulator offers a compact and efficient solution for maintaining stable power supplies in various electronic applications, despite its limitations in maximum output current and sensitivity to external noise.

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