LTC3499EDD#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High Efficiency - Low Quiescent Current - Small Package Size - Wide Input Voltage Range

Package: DFN-10

Essence: The LTC3499EDD#TRPBF is a high-efficiency, low quiescent current synchronous buck-boost DC/DC converter. It is designed to provide a regulated output voltage from a wide range of input voltages.

Packaging/Quantity: The LTC3499EDD#TRPBF is available in a DFN-10 package. It is typically sold in reels or tubes containing a specific quantity of units.

Specifications

• Input Voltage Range: 1.8V to 5.5V
• Output Voltage Range: 2.5V to 5.25V
• Maximum Output Current: 1A
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC3499EDD#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. PG: Power Good Indicator
7. VOUT: Output Voltage
8. LX: Inductor Connection
9. BST: Boost Capacitor Connection
10. SS: Soft-Start Capacitor Connection

Functional Features

• Synchronous Buck-Boost Operation: Allows the LTC3499EDD#TRPBF to regulate the output voltage efficiently, even when the input voltage is higher or lower than the desired output voltage.
• Low Quiescent Current: Ensures minimal power consumption when the converter is in standby or light load conditions.
• Power Good Indicator: The PG pin provides a signal indicating when the output voltage is within the desired range.
• Enable Pin: Allows for easy control of the converter's operation by enabling or disabling it as needed.

Advantages and Disadvantages

Advantages: - High efficiency conversion - Wide input voltage range - Small package size - Low quiescent current

Disadvantages: - Limited maximum output current (1A)

Working Principles

The LTC3499EDD#TRPBF operates as a synchronous buck-boost converter, which means it can step up or step down the input voltage to provide a regulated output voltage. It achieves this through the use of an internal power switch and synchronous rectifier.

When the input voltage is higher than the desired output voltage, the LTC3499EDD#TRPBF operates in buck mode, stepping down the voltage. Conversely, when the input voltage is lower than the desired output voltage, it operates in boost mode, stepping up the voltage.

The converter uses pulse width modulation (PWM) to regulate the output voltage. By adjusting the duty cycle of the internal power switch, the converter maintains a stable output voltage regardless of input voltage variations.

Detailed Application Field Plans

The LTC3499EDD#TRPBF is commonly used in various applications that require efficient power management. Some of the typical application fields include:

1. Battery-Powered Devices: The LTC3499EDD#TRPBF is suitable for portable electronic devices powered by batteries, such as smartphones, tablets, and wearable devices. Its wide input voltage range and high efficiency make it ideal for maximizing battery life.

2. Industrial Automation: The converter can be used in industrial automation systems to regulate power supply voltages for sensors, actuators, and other components. Its small package size and low quiescent current make it suitable for space-constrained applications.

3. Automotive Electronics: The LTC3499EDD#TRPBF can be employed in automotive electronics, such as infotainment systems, navigation devices, and lighting control modules. Its wide input voltage range and high efficiency ensure stable power supply under varying conditions.

Detailed and Complete Alternative Models

1. LT8490: A similar buck-boost converter with a higher maximum output current of 3A.
2. LTC3112: Another buck-boost converter with a wider input voltage range and lower quiescent current.
3. LT8390: A high-power buck-boost converter capable of delivering up to 10A output current.

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

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