LT1936HMS8E#PBF

Overview

The LT1936HMS8E#PBF is a synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 4.5V to 36V and provides an adjustable output voltage from 0.8V to 31.2V. The device delivers up to 1.5A of continuous output current with a fixed switching frequency of 500kHz. It features a low quiescent current of 175µA and includes integrated protection mechanisms such as cycle-by-cycle current limit, thermal shutdown, and soft-start. The component is housed in an 8-lead MSOP package with an exposed pad for enhanced thermal performance.

Feature Summary

• Synchronous rectification architecture ensures high efficiency across the load range
• Integrated cycle-by-cycle current limiting protects against short circuits and overloads
• Thermal shutdown circuitry prevents damage during overheating conditions
• Soft-start function limits inrush current and stabilizes startup sequences

Applications

• Portable instrumentation systems requiring efficient power conversion
• Industrial control boards needing stable regulated voltages
• Battery-powered devices utilizing step-down topology
• Embedded systems with distributed power supply architectures

Procurement Notes

Verify the specific suffix 'HMS8E' corresponds to the correct temperature grade and packaging configuration required for your design. Confirm that the exposed pad thermal connection matches your PCB layout capabilities. Ensure compatibility with the 500kHz switching frequency regarding external component selection. Cross-reference the datasheet revision to confirm pinout consistency before finalizing procurement orders.

Selection Notes

Select this component when a compact solution is needed for moderate current applications up to 1.5A. It is suitable for designs where efficiency at light loads is critical due to its low quiescent current. Consider the 36V maximum input rating for direct battery or bus connections. Evaluate the thermal requirements of the MSOP package to ensure adequate copper area for heat dissipation under full load conditions.

Part Context

This part belongs to the LT1936 family of synchronous buck converters designed for high-efficiency power management. It complements other Analog Devices regulators by offering a balance between size, cost, and performance. The device is commonly used alongside evaluation boards like the DC825A for rapid prototyping and testing in development environments.

Replacement Considerations

Public confirmed substitute part numbers: LT1936EMS8E#PBF, LT1936IMS8E#TRPBF.