LTC3617EUDD

Product Overview

Category

LTC3617EUDD belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various electronic devices to regulate and control power supply, ensuring efficient and reliable operation.

Characteristics

• High efficiency: LTC3617EUDD offers excellent power conversion efficiency, minimizing energy loss during voltage regulation.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse applications.
• Compact package: The LTC3617EUDD is available in a small form factor package, enabling space-saving designs.
• Low quiescent current: This IC has low standby power consumption, enhancing overall system efficiency.

Package and Quantity

The LTC3617EUDD is typically packaged in a compact 12-pin DFN (Dual Flat No-Lead) package. It is commonly sold in reels containing a specified quantity of units.

Specifications

• Input Voltage Range: 2.25V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 3A
• Switching Frequency: Adjustable up to 4MHz
• Quiescent Current: 50µA (typical)
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LTC3617EUDD features the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. SW: Switching node connection
4. FB: Feedback voltage pin
5. VOUT: Output voltage pin
6. PGND: Power ground pin
7. SS: Soft-start capacitor connection
8. SYNC: Synchronization pin
9. EN: Enable pin
10. VCC: Supply voltage pin
11. BST: Bootstrap capacitor connection
12. AGND: Analog ground pin

Functional Features

• High Efficiency: The LTC3617EUDD utilizes advanced control techniques to achieve high power conversion efficiency, reducing energy waste and enhancing battery life in portable devices.
• Wide Input Voltage Range: With its wide input voltage range, this IC can accommodate various power sources, including batteries, adapters, and USB supplies.
• Synchronous Rectification: The integrated synchronous rectifier improves overall efficiency by minimizing power losses during the switching process.
• Adjustable Switching Frequency: The switching frequency can be adjusted up to 4MHz, allowing designers to optimize performance based on specific application requirements.
• Soft-Start Function: The soft-start feature ensures a controlled and gradual increase in output voltage during startup, preventing excessive current surges.

Advantages and Disadvantages

Advantages

• High efficiency power conversion
• Wide input voltage range for versatile applications
• Compact package size for space-constrained designs
• Low quiescent current for improved system efficiency
• Adjustable switching frequency for optimization

Disadvantages

• Limited maximum output current (3A)
• Requires careful thermal management due to high power density

Working Principles

The LTC3617EUDD operates as a step-down (buck) converter, converting a higher input voltage to a lower output voltage. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal circuitry includes a power MOSFET switch, synchronous rectifier, feedback loop, and control logic. By adjusting the duty cycle of the PWM signal, the IC maintains the desired output voltage while efficiently transferring power from the input source to the load.

Application Field Plans

The LTC3617EUDD finds extensive use in various electronic devices and systems, including but not limited to: - Portable consumer electronics (smartphones, tablets, portable media players) - Industrial equipment (test and measurement instruments, control systems) - Automotive electronics (infotainment systems, advanced driver-assistance systems) - Communication devices (routers, modems, network switches) - Battery-powered devices (wearable devices, IoT sensors)

Alternative Models

For applications requiring similar functionality, the following alternative models can be considered: - LTC3615EUDD - LTC3618EUDD - LTC3619EUDD - LTC3620EUDD

These alternatives offer comparable features and performance characteristics, providing flexibility in design choices.

In conclusion, the LTC3617EUDD is a highly efficient power management IC designed for various electronic applications. Its compact package, wide input voltage range, and adjustable switching frequency make it suitable for diverse designs. While it has certain limitations, its advantages outweigh the disadvantages, making it a popular choice among designers seeking reliable power regulation solutions.