LT1139ACSW#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, low power consumption
• Package: Surface Mount
• Essence: Voltage Regulator
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Output Current: Up to 1A
• Dropout Voltage: 300mV at 1A
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LT1139ACSW#TRPBF has a total of 16 pins. The pin configuration is as follows:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. FB: Feedback pin
5. VOUT: Output voltage pin
6. COMP: Compensation pin
7. SS: Soft-start pin
8. PGND: Power ground pin
9. PGND: Power ground pin
10. PGND: Power ground pin
11. PGND: Power ground pin
12. PGND: Power ground pin
13. PGND: Power ground pin
14. PGND: Power ground pin
15. PGND: Power ground pin
16. PGND: Power ground pin

Functional Features

• High efficiency voltage regulation
• Low dropout voltage
• Overcurrent protection
• Thermal shutdown protection
• Soft-start function for smooth power-up

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption - Wide input voltage range allows for versatile applications - Compact surface mount package saves board space - Overcurrent and thermal protection ensure device safety

Disadvantages: - Limited output current capacity (up to 1A) - Dropout voltage may affect performance in low input voltage scenarios

Working Principles

The LT1139ACSW#TRPBF is a voltage regulator IC that maintains a stable output voltage regardless of fluctuations in the input voltage. It achieves this by using an internal feedback mechanism to adjust the output voltage based on the reference voltage and the feedback voltage from the FB pin. The enable pin (EN) controls the operation of the regulator, allowing it to be turned on or off as needed. The soft-start pin (SS) gradually ramps up the output voltage during power-up to prevent sudden voltage spikes.

Detailed Application Field Plans

The LT1139ACSW#TRPBF is commonly used in various applications where efficient voltage regulation is required. Some of the typical application fields include:

1. Battery-powered devices: Portable electronics such as smartphones, tablets, and wearable devices benefit from the LT1139ACSW#TRPBF's low power consumption and wide input voltage range.
2. Industrial equipment: The voltage regulator is suitable for powering control systems, sensors, and other components in industrial machinery.
3. Automotive electronics: The IC can be utilized in automotive applications like infotainment systems, lighting modules, and engine control units.
4. IoT devices: Internet of Things (IoT) devices often operate on low power and require stable voltage regulation, making the LT1139ACSW#TRPBF a suitable choice.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. LT1763-3.3: Offers higher output current capability while maintaining low dropout voltage.
3. TPS7A4700: Provides ultra-low noise performance in addition to voltage regulation.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

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