MAX857EPA

Overview

The MAX857EPA is a step-up DC-DC switching regulator manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a boost topology to provide adjustable output voltages ranging from 2.7 V to 6 V or fixed outputs of 3.3 V and 5 V. The device supports an output current of 150 mA with an input voltage range spanning from 800 mV to 6 V. Operating at a fixed switching frequency of 500 kHz, it ensures efficient power conversion within a temperature range of -40°C to +85°C. The component is housed in an 8-pin PDIP package for through-hole mounting.

Feature Summary

• Boost topology enables voltage step-up from low input sources
• Adjustable or fixed output voltage options for flexible system design
• Integrated switch eliminates external inductor requirements for compact layouts

Applications

• Portable battery-powered equipment requiring voltage elevation
• Single-cell lithium-ion battery charging systems
• General-purpose DC-DC conversion in embedded electronics

Procurement Notes

Verify the specific suffix and package type against official datasheets to ensure compatibility with through-hole assembly processes. Confirm that the operating temperature range meets environmental requirements. Cross-reference part numbers with manufacturer documentation to avoid counterfeit components. Check for RoHS compliance status if required by regulatory standards. Validate supply chain authenticity through authorized distributors.

Selection Notes

Choose this regulator when a compact solution is needed for boosting low input voltages to standard logic levels. Consider the 150 mA output limit for load requirements. Evaluate the 500 kHz switching frequency for EMI constraints. Ensure the PDIP package aligns with PCB layout capabilities. Compare efficiency characteristics against alternative topologies for optimal power management.

Part Context

This component belongs to the MAX857 series of switching regulators designed for space-constrained applications. It represents Maxim Integrated's approach to simplifying power supply designs by integrating the power switch internally. The series targets cost-sensitive markets requiring reliable voltage regulation without complex external circuitry.

Replacement Considerations

Consult official cross-reference tools for parametrically similar parts. Verify pinout compatibility before substitution. Ensure equivalent electrical specifications match application needs.