MCP1725-ADJE/MC

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MCP1725-ADJE/MC is a 500 mA Low Dropout (LDO) linear regulator manufactured by Microchip Technology. It features an adjustable output voltage range from 0.8V to 5.0V, with a typical dropout voltage of 210 mV at full load. The device operates within an input voltage range of 2.3V to 6.0V and consumes a typical quiescent current of 120 µA. It includes a shutdown control input that reduces supply current to 0.1 µA. The component provides overtemperature protection and short circuit current limiting. It is housed in an 8-lead DFN package measuring 2x3 mm.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Adjustable output voltage capability ranging from 0.8V to 5.0V via external resistors
• Integrated power-good output with adjustable delay timing for system reset synchronization
• Operates stably with low-cost ceramic output capacitors requiring only 1.0 µF
• Includes shutdown control input and comprehensive protection against overtemperature and short circuits

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'E' indicates RoHS compliance and lead-free status as per Microchip standards. Confirm the '/MC' designation corresponds to the 2x3 DFN-8 package variant. Ensure the application design accounts for the required minimum 1 µF ceramic output capacitance for stability. Validate that the thermal requirements are met given the small package footprint.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when an adjustable output voltage between 0.8V and 5.0V is required alongside high current capability up to 500 mA. It is suitable for battery-powered applications due to its low quiescent current and low dropout characteristics. Consider the DFN-8 package for space-constrained designs. Ensure the input voltage remains within the 2.3V to 6.0V operational range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The MCP1725 series comprises 500 mA LDO regulators available in both fixed and adjustable output versions. The MCP1725-ADJE/MC specifically denotes the adjustable variant in the DFN-8 package. This family targets portable computing and networking equipment where efficiency and size are critical. Other variants include fixed voltage options and different package types like SOIC-8.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Public confirmed substitute part numbers include MCP1725T-ADJE/MC (tape and reel version) and MCP1725-ADJE/SN (SOIC-8 package). Verify pinout compatibility and thermal performance when switching between DFN and SOIC packages.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the function of the CDELAY pin?

The CDELAY pin sets the power-up delay time for the Power Good (PWRGD) output. Connecting an external capacitor allows adjustment of the delay from 200 µs to 300 ms.

How is the output voltage adjusted?

The output voltage is set using two external resistors connected to the ADJ pin. The nominal voltage for the ADJ pin is typically 0.41V.

Is the MCP1725 stable with ceramic capacitors?

Yes, the MCP1725 is stable with ceramic output capacitors. A minimum of 1.0 µF is required, and X7R or X5R materials are recommended.