Linear Technology/Analog Devices
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LTC3546EFE

LTC3546EFE

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Quiescent Current, Small Package Size
  • Package: 20-Lead TSSOP
  • Essence: Voltage Regulator
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 2.7V to 5.5V
  • Output Voltage Range: 0.6V to VIN
  • Maximum Output Current: 600mA
  • Quiescent Current: 30µA
  • Switching Frequency: 1MHz
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LTC3546EFE has a total of 20 pins. The pin configuration is as follows:

  1. VIN: Input Voltage
  2. GND: Ground
  3. SW: Switch Node
  4. FB: Feedback Voltage
  5. EN: Enable Pin
  6. SS: Soft-Start Capacitor
  7. VOUT: Output Voltage
  8. PGND: Power Ground
  9. AGND: Analog Ground
  10. LX: Inductor Connection
  11. BST: Boost Capacitor
  12. COMP: Compensation Node
  13. SS/TRK: Soft-Start/Tracking
  14. VCC: Supply Voltage
  15. VREF: Reference Voltage
  16. ISET: Output Current Set
  17. PGOOD: Power Good Indicator
  18. SYNC: Synchronization
  19. CLKOUT: Clock Output
  20. CLKIN: Clock Input

Functional Features

  • High efficiency voltage regulator with low quiescent current
  • Wide input voltage range suitable for various applications
  • Adjustable output voltage to meet specific requirements
  • Internal compensation for simplified design
  • Soft-start and tracking functionality for controlled startup
  • Power good indicator for system monitoring
  • Synchronization capability for noise-sensitive applications

Advantages and Disadvantages

Advantages

  • High efficiency operation conserves power
  • Low quiescent current extends battery life
  • Small package size saves board space
  • Wide input voltage range allows flexibility in power sources
  • Adjustable output voltage accommodates different loads
  • Internal compensation simplifies circuit design
  • Soft-start and tracking features ensure smooth startup
  • Power good indicator enhances system reliability
  • Synchronization capability reduces noise interference

Disadvantages

  • Limited maximum output current (600mA)
  • Requires external components for proper operation
  • Not suitable for high-power applications

Working Principles

The LTC3546EFE is a voltage regulator IC that converts an input voltage within the range of 2.7V to 5.5V into a regulated output voltage between 0.6V and VIN. It achieves high efficiency by utilizing a synchronous buck-boost architecture. The internal control circuitry adjusts the duty cycle of the switching transistor to maintain the desired output voltage.

The device operates at a fixed switching frequency of 1MHz, which can be synchronized to an external clock signal if required. It incorporates internal compensation, eliminating the need for external compensation components. Soft-start and tracking functions ensure controlled startup and minimize output voltage overshoot during load transients.

Detailed Application Field Plans

The LTC3546EFE is well-suited for a wide range of applications, including but not limited to:

  1. Battery-powered portable devices
  2. IoT (Internet of Things) devices
  3. Wearable electronics
  4. Industrial sensors and instrumentation
  5. Automotive electronics
  6. Medical devices
  7. Communication systems
  8. Consumer electronics

Detailed and Complete Alternative Models

  1. LTC3546EFE-1: Similar specifications, different package (16-Lead QFN)
  2. LTC3546EFE-2: Higher maximum output current (800mA), same package
  3. LTC3546EFE-3: Lower quiescent current (20µA), same package
  4. LTC3546EFE-4: Adjustable switching frequency, same package

These alternative models provide options for different design requirements while maintaining similar functionality and characteristics.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LTC3546EFE en soluciones técnicas

  1. Question: What is the input voltage range for LTC3546EFE?
    Answer: The input voltage range for LTC3546EFE is 2.7V to 5.5V.

  2. Question: What is the typical output current of LTC3546EFE?
    Answer: The typical output current of LTC3546EFE is 400mA.

  3. Question: Can LTC3546EFE be used in battery-powered applications?
    Answer: Yes, LTC3546EFE is suitable for battery-powered applications due to its low quiescent current and wide input voltage range.

  4. Question: What is the efficiency of LTC3546EFE under typical operating conditions?
    Answer: The efficiency of LTC3546EFE can reach up to 95% under typical operating conditions.

  5. Question: Does LTC3546EFE have built-in overcurrent protection?
    Answer: Yes, LTC3546EFE features built-in overcurrent protection to safeguard the load and the device itself.

  6. Question: What type of package does LTC3546EFE come in?
    Answer: LTC3546EFE is available in a 16-lead plastic TSSOP package.

  7. Question: Can LTC3546EFE operate in ambient temperatures outside the standard range?
    Answer: LTC3546EFE is designed to operate in extended temperature ranges, making it suitable for harsh environments.

  8. Question: Is there an evaluation board available for LTC3546EFE?
    Answer: Yes, an evaluation board for LTC3546EFE, the DC2042A, is available to aid in testing and prototyping.

  9. Question: What are the key features that differentiate LTC3546EFE from similar devices?
    Answer: LTC3546EFE stands out due to its low dropout voltage, high efficiency, and low quiescent current, making it ideal for various technical solutions.

  10. Question: Can LTC3546EFE be used in automotive applications?
    Answer: Yes, LTC3546EFE is suitable for automotive applications, thanks to its wide input voltage range and robust design.