The LTC3621IDCB-3.3#TRPBF is a high-performance, synchronous step-down regulator from Linear Technology, designed to deliver a fixed output voltage of 3.3V. This compact and efficient power management integrated circuit (PMIC) is capable of supplying up to 1A of continuous output current from a wide input voltage range of 2.7V to 17V, making it suitable for a broad array of applications in consumer electronics, industrial, automotive, and telecommunications sectors.

With its high efficiency and fast transient response, the LTC3621IDCB-3.3#TRPBF is optimized for battery-powered systems where power conservation is critical. The device integrates high-side and low-side switches, which eliminates the need for an external diode and reduces overall system complexity and cost. The high switching frequency of up to 2.25MHz allows the use of small, low-cost capacitors and inductors, further minimizing the solution footprint and enhancing the power density.

This regulator features multiple modes of operation, including Burst Mode® operation, which ensures high efficiency at low output currents, and a forced continuous mode for applications requiring low noise operation. The LTC3621IDCB-3.3#TRPBF also provides over-temperature protection, over-current protection, and under-voltage lockout, enhancing the reliability and safety of the end application.

The LTC3621IDCB-3.3#TRPBF is available in a 6-pin DFN package with a low-profile (0.75mm) and a compact (2mm x 3mm) footprint. The small size and thermal performance make it an ideal choice for space-constrained applications. The device is also RoHS compliant and is specified over the commercial and industrial temperature ranges.

Key features of the LTC3621IDCB-3.3#TRPBF include:

• Fixed 3.3V output voltage
• Up to 1A of continuous output current
• Wide input voltage range: 2.7V to 17V
• High efficiency: Up to 95%
• High switching frequency: Up to 2.25MHz
• Burst Mode® operation for high efficiency at low output currents
• Forced continuous mode for low noise applications
• Over-temperature and over-current protection
• Under-voltage lockout
• Compact 6-pin DFN package

The LTC3621IDCB-3.3#TRPBF is an ideal solution for designers looking for a high-efficiency, space-saving, and reliable step-down regulator for their power supply designs.