LTC3621IDCB-3.3#TRMPBF

Voltage Regulators - DC DC Switching Regulators Overview

The LTC3621IDCB-3.3#TRMPBF is a synchronous monolithic step-down regulator from Analog Devices, designed for high efficiency in compact applications. It operates with an input voltage range of 2.7V to 17V and delivers up to 1A output current. The device features a fixed switching frequency of 1MHz or 2.25MHz with a ±40% synchronization range. It achieves ultra-low quiescent current of 3.5µA and maintains high efficiency across a wide output voltage range. The component supports forced continuous mode operation and includes shutdown functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology providing high efficiency over a wide load and input voltage range
• Ultra-low quiescent current consumption for enhanced battery life in portable designs
• Flexible switching frequency selection with external synchronization capability
• Integrated soft-start and thermal protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Portable instrumentation and test equipment power supplies
• Industrial control systems requiring efficient DC-DC conversion
• Battery-powered devices needing extended operational time
• Embedded systems with strict size and efficiency constraints

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix #TRMPBF indicates tape and reel packaging when ordering. Confirm the operating temperature grade matches your environmental requirements. Ensure compatibility with the intended switching frequency configuration. Check for RoHS compliance status if required by your manufacturing standards. Validate pinout alignment with your PCB layout design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Choose this regulator when input voltages exceed 5V and efficiency is critical. The 1MHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the 1A current limit for loads requiring moderate power delivery. Evaluate the need for synchronization if multiple converters operate in proximity. Assess thermal performance based on expected ambient temperatures and board copper area.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LTC3621 family of synchronous step-down regulators. The IDCB package denotes an 8-lead DFN (4x4mm) footprint suitable for surface mount assembly. The part number structure indicates the temperature grade and output voltage setting. Analog Devices designs this series for applications demanding high efficiency and low standby power consumption.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other parts within the LTC3621 family with adjusted output voltages. Cross-reference with similar 17V, 1A synchronous buck regulators from Analog Devices. Verify pin-to-pin compatibility before replacing with non-family members. Ensure equivalent switching frequency ranges and quiescent current specifications.