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LTC3621IDCB
Product Overview
Category: Integrated Circuit (IC)
Use: Power Management IC
Characteristics: - High efficiency step-down DC/DC converter - Wide input voltage range: 2.25V to 5.5V - Adjustable output voltage range: 0.6V to VIN - Maximum output current: 2A - Low quiescent current: 20µA - Internal synchronous rectification for high efficiency - Soft-start and current limit protection - Thermal shutdown
Package: DFN-8 (3mm x 3mm)
Essence: The LTC3621IDCB is a high-efficiency step-down DC/DC converter designed for power management applications.
Packaging/Quantity: The LTC3621IDCB is available in a DFN-8 package and is typically sold in reels of 2500 units.
Specifications
- Input Voltage Range: 2.25V to 5.5V
- Output Voltage Range: 0.6V to VIN
- Maximum Output Current: 2A
- Quiescent Current: 20µA
- Efficiency: Up to 95%
- Switching Frequency: 1MHz
- Operating Temperature Range: -40°C to 125°C
Detailed Pin Configuration
The LTC3621IDCB has the following pin configuration:
- VIN: Input voltage pin
- GND: Ground pin
- SW: Switching node pin
- FB: Feedback voltage pin
- EN: Enable pin
- SS: Soft-start pin
- PG: Power good indicator pin
- VOUT: Output voltage pin
Functional Features
- High efficiency: The LTC3621IDCB utilizes internal synchronous rectification to achieve high efficiency, resulting in reduced power dissipation.
- Wide input voltage range: The IC can operate with input voltages ranging from 2.25V to 5.5V, making it suitable for a variety of applications.
- Adjustable output voltage: The output voltage can be adjusted from 0.6V to the input voltage (VIN), providing flexibility in power management.
- Current limit protection: The LTC3621IDCB incorporates a current limit protection feature to prevent excessive current flow and protect the circuit.
- Soft-start: The soft-start feature ensures a controlled startup, reducing inrush current and potential voltage spikes.
- Thermal shutdown: The IC includes thermal shutdown protection, which shuts down the device if the temperature exceeds a safe operating limit.
Advantages and Disadvantages
Advantages: - High efficiency operation - Wide input voltage range - Adjustable output voltage - Current limit protection - Soft-start feature - Thermal shutdown protection
Disadvantages: - Limited maximum output current (2A)
Working Principles
The LTC3621IDCB is a step-down DC/DC converter that uses a synchronous rectification architecture. It operates by converting a higher input voltage to a lower output voltage with high efficiency. The internal switches control the energy transfer from the input to the output, while minimizing power losses. The feedback mechanism adjusts the duty cycle of the switches to maintain the desired output voltage.
Detailed Application Field Plans
The LTC3621IDCB is commonly used in various power management applications, including but not limited to: - Portable electronic devices - Battery-powered systems - Industrial equipment - Automotive electronics - Distributed power supplies
Detailed and Complete Alternative Models
Some alternative models to the LTC3621IDCB include: - LTC3621IDD: Similar specifications and features, but available in a DFN-10 package. - LTC3621IMS: Similar specifications and features, but available in a MSOP-10 package. - LTC3621HDD: Higher maximum output current (3A), but available in a DFN-10 package.
These alternative models offer similar functionality and can be considered based on specific application requirements.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LTC3621IDCB en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of LTC3621IDCB in technical solutions:
Q: What is LTC3621IDCB? A: LTC3621IDCB is a high-efficiency, synchronous buck converter IC (integrated circuit) designed for low-power applications.
Q: What is the input voltage range supported by LTC3621IDCB? A: LTC3621IDCB supports an input voltage range from 2.7V to 5.5V.
Q: What is the output voltage range that can be achieved with LTC3621IDCB? A: The output voltage range of LTC3621IDCB can be set between 0.6V and VIN.
Q: Can LTC3621IDCB deliver high output currents? A: Yes, LTC3621IDCB is capable of delivering output currents up to 2A.
Q: Is LTC3621IDCB suitable for battery-powered applications? A: Yes, LTC3621IDCB is well-suited for battery-powered applications due to its low quiescent current and high efficiency.
Q: Does LTC3621IDCB have built-in protection features? A: Yes, LTC3621IDCB includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
Q: Can LTC3621IDCB operate in a wide temperature range? A: Yes, LTC3621IDCB has an operating temperature range of -40°C to 125°C, making it suitable for a wide range of environments.
Q: What type of package does LTC3621IDCB come in? A: LTC3621IDCB is available in a 6-pin DFN (Dual Flat No-Lead) package.
Q: Can LTC3621IDCB be used in automotive applications? A: Yes, LTC3621IDCB is qualified for automotive applications and meets the AEC-Q100 standard.
Q: Are there any evaluation boards or reference designs available for LTC3621IDCB? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs to help users get started with LTC3621IDCB in their applications.
Please note that these answers are general and may vary depending on specific application requirements. It's always recommended to refer to the datasheet and application notes for detailed information.