UC2708NE

Product Overview

Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: High precision, low dropout voltage, adjustable output voltage
Package: DIP-8 (Dual In-line Package with 8 pins)
Essence: The UC2708NE is a voltage regulator IC that provides a stable output voltage regardless of input voltage fluctuations.
Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.

Specifications

Input Voltage Range: 2.7V to 18V
Output Voltage Range: 1.25V to 16V
Dropout Voltage: 0.5V (typical)
Output Current: Up to 500mA
Line Regulation: ±0.05% (typical)
Load Regulation: ±0.1% (typical)
Quiescent Current: 75µA (typical)

Detailed Pin Configuration

The UC2708NE has the following pin configuration:

Vout (Output Voltage)
GND (Ground)
Vin (Input Voltage)
Adj (Adjustment Pin)
NC (No Connection)
NC (No Connection)
NC (No Connection)
NC (No Connection)

Functional Features

High Precision: The UC2708NE offers excellent voltage regulation accuracy, ensuring a stable output voltage even under varying load conditions.
Low Dropout Voltage: With a dropout voltage as low as 0.5V, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
Adjustable Output Voltage: The output voltage can be easily adjusted using an external resistor connected to the adjustment pin (Adj).
Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the circuit from excessive current flow.

Advantages and Disadvantages

Advantages

High precision voltage regulation
Low dropout voltage
Adjustable output voltage
Overcurrent protection

Disadvantages

Limited maximum output current (up to 500mA)
Requires an external resistor for voltage adjustment

Working Principles

The UC2708NE is based on a linear voltage regulator architecture. It utilizes a feedback mechanism to compare the output voltage with a reference voltage, continuously adjusting the internal circuitry to maintain a stable output voltage. The dropout voltage is minimized by employing low resistance pass elements.

Detailed Application Field Plans

The UC2708NE finds applications in various electronic devices and systems, including:

Battery-powered devices: Provides regulated voltage for portable electronics such as smartphones, tablets, and portable audio players.
Automotive electronics: Ensures stable voltage supply for automotive systems, including infotainment systems, lighting controls, and sensors.
Industrial equipment: Used in power supplies for industrial machinery, control systems, and instrumentation.
Communication systems: Provides voltage regulation for routers, switches, and other network equipment.
Medical devices: Used in medical equipment that requires precise and stable voltage supply.

Detailed and Complete Alternative Models

LM317: A popular adjustable voltage regulator IC with similar characteristics.
LT1083: Offers higher output current capability compared to the UC2708NE.
LM7805: Fixed output voltage regulator with a 5V output.

These alternative models provide similar functionality and can be considered as substitutes depending on specific requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací UC2708NE v technických řešeních

Sure! Here are 10 common questions and answers related to the application of UC2708NE in technical solutions:

Q: What is UC2708NE? A: UC2708NE is a voltage mode PWM controller IC used in various power supply applications.
Q: What are the key features of UC2708NE? A: The key features of UC2708NE include adjustable frequency, soft-start capability, current limiting, and under-voltage lockout.
Q: What is the typical input voltage range for UC2708NE? A: The typical input voltage range for UC2708NE is between 7V and 40V.
Q: How does UC2708NE regulate the output voltage? A: UC2708NE regulates the output voltage by adjusting the duty cycle of the PWM signal based on the feedback received from the output voltage sensing circuit.
Q: Can UC2708NE be used in both step-up (boost) and step-down (buck) configurations? A: Yes, UC2708NE can be used in both step-up and step-down configurations, making it versatile for various power supply designs.
Q: What is the maximum switching frequency supported by UC2708NE? A: The maximum switching frequency supported by UC2708NE is typically around 500kHz.
Q: Does UC2708NE have built-in protection features? A: Yes, UC2708NE has built-in protection features such as over-current protection and thermal shutdown.
Q: Can UC2708NE operate in a wide temperature range? A: Yes, UC2708NE can operate in a wide temperature range, typically from -40°C to 85°C.
Q: Is UC2708NE suitable for battery-powered applications? A: Yes, UC2708NE is suitable for battery-powered applications as it has low quiescent current and can operate with a wide input voltage range.
Q: Are there any application notes or reference designs available for UC2708NE? A: Yes, the manufacturer of UC2708NE provides application notes and reference designs that can help in implementing the IC in various technical solutions.

Please note that the answers provided here are general and may vary depending on specific design requirements and application scenarios. It's always recommended to refer to the datasheet and consult the manufacturer for detailed information.