LTC1147LCS8

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low Voltage Step-Up DC/DC Converter
• Package: 8-Lead Plastic Small Outline (SOIC)
• Essence: Efficient voltage boost for low voltage applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 1.5V to 4.5V
• Output Voltage Range: 2.7V to 5.5V
• Switching Frequency: 1.2MHz
• Quiescent Current: 50µA
• Shutdown Current: 1µA
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC1147LCS8 has the following pin configuration:

```

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| | --| VIN GND |-- Pin 1: Input Voltage (VIN) and Ground (GND) --| SW FB |-- Pin 2: Switching Node (SW) and Feedback (FB) --| LX VOUT|-- Pin 3: Inductor Connection (LX) and Output Voltage (VOUT) --| SHDN PG |-- Pin 4: Shutdown (SHDN) and Power Good (PG) |___________| ```

Functional Features

• Low Voltage Boost: The LTC1147LCS8 is designed to efficiently boost low input voltages to higher output voltages.
• High Efficiency: It achieves high efficiency through its internal synchronous rectification and low quiescent current.
• Wide Input and Output Voltage Range: The IC can accept input voltages ranging from 1.5V to 4.5V and provide output voltages from 2.7V to 5.5V.
• Internal Compensation: The device incorporates internal compensation, simplifying the design process.

Advantages and Disadvantages

Advantages

• Efficient voltage boost for low voltage applications
• High efficiency through synchronous rectification
• Wide input and output voltage range
• Internal compensation simplifies design process

Disadvantages

• Limited to step-up voltage conversion only
• Requires external components for proper operation

Working Principles

The LTC1147LCS8 is a step-up DC/DC converter that utilizes a switching regulator topology. It operates by converting a low input voltage into a higher output voltage using an inductor and a capacitor. The IC controls the switching of the inductor to store energy during the on-time and release it to the output during the off-time. This process efficiently boosts the voltage while maintaining high efficiency.

Detailed Application Field Plans

The LTC1147LCS8 finds applications in various fields, including:

1. Battery-Powered Devices: It can be used to boost the voltage from a low battery voltage to power other components or subsystems.
2. Portable Electronics: The IC enables efficient voltage conversion for portable electronic devices with low input voltages.
3. IoT Devices: It can be utilized in IoT devices that require a higher voltage level for certain components or wireless communication modules.
4. Wearable Technology: The LTC1147LCS8 can be employed in wearable devices to increase the voltage for driving sensors, displays, or wireless connectivity.

Detailed and Complete Alternative Models

Some alternative models to the LTC1147LCS8 include:

1. LT1307: Similar low voltage step-up DC/DC converter with adjustable output voltage.
2. MAX1726: Integrated step-up DC/DC converter with higher input voltage range and adjustable output voltage.
3. TPS61220: Ultra-low power boost converter with a wide input voltage range and adjustable output voltage.

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

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