LT3502IDC#TRPBF

Overview

The LT3502IDC#TRPBF is a synchronous step-down switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 3V to 40V and provides an adjustable output voltage from 0.8V to 36V. The device delivers a maximum output current of 500mA through a single positive output channel. It integrates a 1.1MHz fixed-frequency oscillator for efficient power conversion. The component is housed in an 8-WFDFN package with an exposed thermal pad, designed for surface-mount installation. It supports a junction temperature operating range from -40°C to 125°C.

Feature Summary

• Integrates high-side and low-side N-channel MOSFETs for synchronous rectification
• Includes internal compensation network to minimize external component count
• Features cycle-by-cycle current limit and thermal shutdown protection
• Supports external synchronization to an external clock signal

Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with wide input voltage ranges
• Communication infrastructure power distribution

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the IDC package designation matches the required 8-lead DFN footprint on the PCB layout. Ensure the I grade temperature rating aligns with the operational environment requirements. Cross-reference the manufacturer part number directly with official Analog Devices documentation to avoid counterfeit components.

Selection Notes

Select this component for applications requiring a compact solution with a wide input voltage range up to 40V. The integrated synchronous design offers higher efficiency compared to non-synchronous alternatives at moderate loads. Consider the 1.1MHz switching frequency for balancing component size and efficiency. Verify that the 500mA output current capability meets the load requirements without exceeding thermal limits in the chosen enclosure.

Part Context

This part belongs to the LT3502 family of monolithic switching regulators. It is distinct from the LT3507 series which offers multiple outputs and higher current capabilities. The DC1221B evaluation board is associated with the LT3502 family for performance testing. It differs from the LTC3542 which features a lower input voltage range and different pinout configuration.

Replacement Considerations

LT3502EDC#PBF: Same electrical specifications but available in tube packaging instead of tape-and-reel.