LT8494IFE#PBF

Overview

The LT8494IFE#PBF is a monolithic synchronous step-up DC/DC converter and SEPIC controller designed for automotive applications. It operates with an input voltage range of 1V to 32V, supporting single-cell lithium-ion battery operation. The device integrates a high-voltage switch capable of handling up to 70V, enabling output voltages from 1.202V to 70V. It features a fixed switching frequency of 1.5MHz and offers adjustable current limit protection. The component is housed in a 20-lead TSSOP package with an exposed pad for thermal dissipation.

Feature Summary

• Integrated high-voltage power switch rated for 70V drain-source breakdown
• Supports boost and SEPIC topologies for wide input voltage ranges
• Automotive-grade qualification ensuring reliability in harsh environments
• Adjustable switching frequency allows optimization for size and efficiency

Applications

• Single-cell lithium-ion battery powered systems
• Automotive infotainment and instrument clusters
• Industrial sensor interfaces requiring isolated or boosted supplies
• LED driver circuits in automotive lighting

Procurement Notes

Verify the specific suffix PBF indicates lead-free tin termination compliant with RoHS standards. Confirm the package variant matches the required 20-pin TSSOP EP footprint. Ensure the automotive grade designation aligns with your system's environmental operating requirements. Cross-reference the datasheet revision date to ensure compatibility with latest design guidelines.

Selection Notes

Select this component when input voltages vary significantly below the desired output level. The integrated 70V switch accommodates load dump conditions common in automotive networks. Consider the 1.5MHz frequency for balancing inductor size against EMI constraints. Verify that the thermal performance of the TSSOP package meets the board's heat dissipation capabilities under maximum load conditions.

Part Context

This part belongs to the LT8494 family of high-voltage DC/DC converters. It shares architectural similarities with other Analog Devices automotive power management ICs but is distinct due to its specific 70V switch rating and SEPIC capability. The IFE suffix denotes the industrial/automotive temperature range and TSSOP package style.

Replacement Considerations

LT8494EFE#PBF is a verified alternative within the same family offering identical electrical specifications. The EFE suffix typically indicates a different packaging option or reel configuration rather than a functional change. Verify pinout compatibility before substitution.