MCP73832T-3ACI/OT

Overview

The MCP73832T-3ACI/OT is a single-cell lithium-ion or lithium-polymer charge management controller manufactured by Microchip Technology. It operates within a supply voltage range of 3.75 V to 6 V and delivers a regulated output voltage of 4.35 V. The device supports a programmable constant charging current up to 500 mA. It utilizes an SOT-23-5 surface-mount package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports standard CC/CV charging profiles for single-cell lithium-ion and lithium-polymer batteries
• Features a programmable constant-current charging control via a single external resistor
• Includes automatic recharge functionality triggered when battery voltage drops below the threshold

Applications

• Single-cell portable electronic devices requiring compact power management
• Battery-powered consumer electronics utilizing lithium-ion or lithium-polymer cells
• Embedded systems with limited board space for power regulation components

Procurement Notes

Verify the specific suffix '3ACI/OT' to confirm the 4.35 V output voltage setting, as other suffixes in the MCP73832 family may provide different fixed voltages such as 4.2 V or 4.5 V. Ensure the SOT-23-5 package matches your PCB footprint requirements. Confirm that the 500 mA maximum current rating aligns with your system's thermal and power constraints before finalizing procurement.

Selection Notes

Select this component when a fixed 4.35 V termination voltage is required for specific lithium chemistry variants. The SOT-23-5 package offers a small form factor suitable for space-constrained designs. Consider the 500 mA current limit when designing for higher capacity batteries, as charging time will be longer compared to higher-current controllers. Verify compatibility with the host system's input voltage range of 3.75 V to 6 V.

Part Context

This part belongs to the MCP73831/2 series of charge management controllers from Microchip Technology. The series provides integrated solutions for single-cell lithium-based batteries. The MCP73832 variant specifically distinguishes itself through its fixed output voltage options, with the '-3A' suffix indicating the 4.35 V configuration. It shares core architectural features with the MCP73831 but targets applications requiring precise voltage termination settings.

Replacement Considerations

MCP73832T-2ACI/OT (4.2 V output)

FAQ

What determines the charging current for the MCP73832T-3ACI/OT?

The constant charging current is determined by the value of a single external resistor connected to the PROG pin.

Does the MCP73832T-3ACI/OT support lithium polymer batteries?

Yes, the datasheet specifies compatibility with both lithium-ion and lithium-polymer battery chemistries.