Linear Technology/Analog Devices
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LTC3459EDC

LTC3459EDC

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Quiescent Current, Wide Input Voltage Range
  • Package: DFN-10
  • Essence: Step-Down DC/DC Converter
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 2.5V to 18V
  • Output Voltage Range: 0.6V to VIN
  • Switching Frequency: 1MHz
  • Quiescent Current: 30µA
  • Maximum Output Current: 600mA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LTC3459EDC has a total of 10 pins:

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

Functional Features

  • High efficiency step-down converter
  • Low quiescent current for improved power efficiency
  • Wide input voltage range allows for versatile applications
  • Adjustable output voltage for flexibility
  • Power good indicator for monitoring the output voltage stability
  • Soft-start feature for controlled startup and reduced inrush current

Advantages and Disadvantages

Advantages: - High efficiency results in less power dissipation - Wide input voltage range accommodates various power sources - Low quiescent current prolongs battery life - Small package size saves board space - Power good indicator ensures stable output voltage

Disadvantages: - Limited maximum output current of 600mA - Requires external components for operation

Working Principles

The LTC3459EDC is a step-down DC/DC converter that efficiently converts a higher input voltage to a lower output voltage. It utilizes a high-frequency switching regulator to minimize power losses and maximize efficiency. The feedback voltage pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable output. The enable pin (EN) allows for easy on/off control, while the soft-start feature ensures a controlled startup sequence.

Detailed Application Field Plans

The LTC3459EDC is commonly used in various applications, including but not limited to:

  1. Battery-powered devices: Portable electronics, handheld instruments, and wireless communication devices benefit from the low quiescent current and wide input voltage range.
  2. Industrial equipment: Control systems, sensors, and motor drives can utilize the efficient power management capabilities of the LTC3459EDC.
  3. Automotive electronics: The wide input voltage range and small package size make it suitable for automotive applications such as infotainment systems, lighting controls, and advanced driver-assistance systems.

Detailed and Complete Alternative Models

  1. LT3480EDC: Similar step-down DC/DC converter with higher maximum output current of 800mA.
  2. LTC3417EDC: Step-down DC/DC converter with adjustable output voltage and higher switching frequency of 2MHz.
  3. LT3470EDC: Low quiescent current step-down DC/DC converter with integrated power switch.

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC3459EDC v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC3459EDC in technical solutions:

  1. Q: What is LTC3459EDC? A: LTC3459EDC is a high-efficiency, synchronous buck-boost DC/DC converter IC.

  2. Q: What is the input voltage range of LTC3459EDC? A: The input voltage range of LTC3459EDC is typically between 2.7V and 16V.

  3. Q: What is the output voltage range of LTC3459EDC? A: The output voltage range of LTC3459EDC can be adjusted from 2.5V to 14V.

  4. Q: What is the maximum output current of LTC3459EDC? A: The maximum output current of LTC3459EDC is typically around 600mA.

  5. Q: Can LTC3459EDC operate in both buck and boost modes? A: Yes, LTC3459EDC can operate in both buck and boost modes, allowing it to step up or step down the input voltage.

  6. Q: Does LTC3459EDC have built-in protection features? A: Yes, LTC3459EDC includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  7. Q: What is the switching frequency of LTC3459EDC? A: The switching frequency of LTC3459EDC is typically around 1.2MHz.

  8. Q: Can LTC3459EDC be used in battery-powered applications? A: Yes, LTC3459EDC is suitable for battery-powered applications due to its wide input voltage range and low quiescent current.

  9. Q: Is LTC3459EDC available in a small package? A: Yes, LTC3459EDC is available in a compact 6-pin DFN package, making it suitable for space-constrained designs.

  10. Q: What are some typical applications of LTC3459EDC? A: LTC3459EDC can be used in various applications such as portable devices, battery chargers, LED drivers, and automotive systems.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.