LTC3459EDC#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency step-up DC/DC converter - Operates from a single Li-Ion cell, USB or 5V supply - Provides a regulated output voltage up to 5.25V - Adjustable output voltage with ±1% accuracy - Low quiescent current - Small package size for space-constrained applications

Package: DFN-10 (3mm x 3mm)

Essence: The LTC3459EDC#TRPBF is a high-efficiency step-up DC/DC converter designed for various portable electronic devices. It provides a regulated output voltage up to 5.25V from a single Li-Ion cell, USB, or 5V supply.

Packaging/Quantity: The LTC3459EDC#TRPBF is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 2.7V to 5.25V
• Maximum Output Current: 600mA
• Quiescent Current: 30µA
• Efficiency: Up to 95%
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC3459EDC#TRPBF has the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node
3. GND: Ground
4. FB: Feedback Voltage
5. EN: Enable Pin
6. SS: Soft-Start Capacitor
7. VOUT: Output Voltage
8. PGND: Power Ground
9. LX: Inductor Connection
10. VOUT: Output Voltage

Functional Features

• High efficiency step-up DC/DC conversion
• Adjustable output voltage with ±1% accuracy
• Low quiescent current for improved battery life
• Soft-start function for controlled startup
• Thermal shutdown and current limit protection

Advantages

• Wide input voltage range allows flexibility in power sources
• Small package size enables space-constrained designs
• High efficiency minimizes power loss and extends battery life
• Accurate output voltage regulation ensures stable operation
• Built-in protection features enhance reliability

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Operating temperature range may restrict usage in extreme environments

Working Principles

The LTC3459EDC#TRPBF utilizes a high-efficiency step-up DC/DC conversion technique to boost the input voltage to a regulated output voltage. It employs a switching regulator topology, which efficiently converts energy from the input source to the output load.

When enabled, the internal control circuitry regulates the duty cycle of the switch node (SW pin), controlling the energy transfer from the input to the output. The feedback voltage (FB pin) is compared to a reference voltage, and the duty cycle is adjusted accordingly to maintain the desired output voltage.

The soft-start capacitor (SS pin) provides a controlled startup by gradually increasing the duty cycle during power-up, preventing excessive inrush current.

Detailed Application Field Plans

The LTC3459EDC#TRPBF is commonly used in portable electronic devices that require a regulated voltage higher than the available power source. Some typical application fields include:

1. Mobile phones and smartphones
2. Tablets and e-readers
3. Portable media players
4. GPS navigation systems
5. Portable gaming consoles
6. Wireless communication devices
7. Wearable electronics

Detailed and Complete Alternative Models

1. LTC3459EDC#PBF: Same specifications and features as LTC3459EDC#TRPBF, but available in a leaded package.
2. LTC3459ESC6#TRMPBF: Similar specifications and features, but in a smaller SOT-23 package.
3. LTC3459IDC#TRPBF: Higher maximum output current of 800mA, suitable for more power-demanding applications.

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

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