MCP1258-E/MF

Voltage Regulators - DC DC Switching Regulators Overview

The MCP1258-E/MF is a Microchip Technology switching voltage regulator featuring a buck topology in a DFN-EP-10 surface-mount package. It delivers a fixed 3.3 V output with a maximum current of 100 mA from an input range of 1.8 V to 3.6 V. The device operates at a 650 kHz switching frequency with a typical quiescent current of 250 nA. It supports AEC-Q100 qualification and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates bypass mode for direct input-to-output connection to maintain peripheral bias with minimal self-consumption.
• Includes power good indication to signal valid output status.
• Features automatic switching between 1.5x and 2x boost topologies to maintain efficiency across the input voltage range.

Voltage Regulators - DC DC Switching Regulators Applications

• Biasing microcontrollers and real-time clocks in battery-powered devices
• Power supply for portable instrumentation
• Home automation product control circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MF' corresponds to the DFN-EP-10 package configuration as documented in the official datasheet. Confirm that the AEC-Q100 automotive qualification aligns with your system requirements. Ensure the buck topology specification matches your circuit design needs, distinguishing it from standard charge pump variants in the series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from single-cell lithium or multi-cell alkaline sources. The low quiescent current suits applications prioritizing standby efficiency. Verify that the 100 mA output capability meets load demands. Consider the DFN-EP-10 package for thermal performance and board space constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the MCP1258 series of positive voltage regulating charge pumps. While often categorized with charge pumps, this specific variant utilizes a buck topology. The series targets low-power embedded systems requiring stable regulation from varying battery voltages without inductors.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution lists for equivalent Microchip regulators. Verify pinout compatibility and electrical parameter alignment before replacing with other MCP125x series members or competitor parts.