LT3970HMS-5#PBF

Overview

The LT3970HMS-5#PBF is a monolithic buck switching regulator from Analog Devices, housed in a 10-lead MSOP package. It accepts an input voltage range of 4.2V to 40V and provides a fixed 5V output with a maximum current of 350mA. The device features an adjustable switching frequency between 200kHz and 2.2MHz, allowing for optimization of external component size. Quiescent current is specified at 1.8uA during operation and 1.7uA in shutdown mode. It operates within a temperature range of -40°C to +150°C.

Feature Summary

• Adjustable switching frequency allows customization of the trade-off between efficiency and passive component size.
• Wide input voltage range supports direct connection to various power sources up to 40V.
• Low quiescent current consumption enhances battery life in portable applications.
• Integrated thermal regulation protects the device during high-load or high-temperature conditions.

Applications

• Battery-powered instrumentation systems
• Industrial control modules requiring wide input ranges
• Portable medical devices
• Automotive electronics subsystems

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence when sourcing. Confirm the MSOP-10 package dimensions match your PCB footprint requirements. Check for availability status as supply constraints may affect procurement timelines. Ensure the fixed 5V output variant matches your system design needs rather than the adjustable version.

Selection Notes

Select this part when a fixed 5V output is required alongside a wide input voltage capability up to 40V. The low static current makes it suitable for always-on applications where standby power is critical. Consider the thermal performance in the MSOP package if operating near the upper limits of the current or temperature specifications. Verify that the 350mA output current meets the load requirements of the downstream circuitry.

Part Context

This component belongs to the LT3970 family of high-voltage step-down converters designed for space-constrained applications. The series offers both adjustable and fixed output voltage options across different package types including MSOP and DDB. The LT3970HMS-5#PBF specifically targets applications needing a reliable 5V rail from higher voltage inputs with minimal external component count.

Replacement Considerations

LT3970IMS-5#PBF: Offers identical electrical performance but in an MSOP package instead of the HMS variant. LT3970IDDB-5: Provides the same functionality in a smaller DDB package. Verify pinout compatibility and thermal characteristics when substituting between package types.