LT1781IN#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance, low-power voltage regulator
• Package: DIP-8 (Dual In-line Package with 8 pins)
• Essence: Regulates and stabilizes voltage in electronic circuits
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 2.7V to 36V
• Output Voltage Range: 1.25V to 34V
• Output Current: Up to 100mA
• Quiescent Current: 75µA (typical)
• Dropout Voltage: 300mV (typical)
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1781IN#PBF IC has the following pin configuration:

1. VOUT: Output Voltage
2. VIN: Input Voltage
3. GND: Ground
4. NC: No Connection
5. NC: No Connection
6. NC: No Connection
7. NC: No Connection
8. ADJ: Adjustable Pin

Functional Features

• High accuracy and stability in regulating output voltage
• Low dropout voltage for efficient power management
• Low quiescent current for reduced power consumption
• Thermal shutdown and current limit protection mechanisms
• Adjustable output voltage using external resistors

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications - Excellent line and load regulation characteristics - Compact package size for space-constrained designs - Low power consumption extends battery life - Robust protection features ensure device longevity

Disadvantages: - Limited output current may not be suitable for high-power applications - Non-adjustable output voltage limits flexibility in certain designs

Working Principles

The LT1781IN#PBF is a linear voltage regulator that operates by comparing the output voltage to an internal reference. It adjusts the pass transistor's resistance to maintain a stable output voltage, compensating for changes in input voltage and load conditions. The adjustable pin (ADJ) allows users to set the desired output voltage using external resistors.

Detailed Application Field Plans

The LT1781IN#PBF finds applications in various fields, including:

1. Battery-powered devices: Provides regulated power supply for portable electronics, such as smartphones, tablets, and wearable devices.
2. Automotive electronics: Ensures stable voltage for automotive systems, including infotainment systems, sensors, and control modules.
3. Industrial automation: Used in control circuits, motor drives, and sensor interfaces to maintain consistent power supply.
4. Telecommunications: Regulates voltage in communication equipment, routers, switches, and base stations.
5. Medical devices: Provides reliable power for medical instruments, patient monitoring systems, and diagnostic equipment.

Detailed and Complete Alternative Models

1. LM317: Adjustable Linear Voltage Regulator with higher output current capability.
2. LT1763: Low Dropout Linear Regulator with ultra-low quiescent current.
3. LM7805: Fixed Output Linear Voltage Regulator with 5V output.
4. LT3080: Programmable Linear Regulator with high output current and adjustable voltage.

These alternative models offer different features and specifications, allowing designers to choose the most suitable option for their specific requirements.

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