MP5493GJ-P

Overview

The MP5493GJ-P is a synchronous buck-boost switching regulator designed for smart meter backup power applications. It integrates two converters: a fixed-output buck converter providing 0.6A at 3.3V or 5V, and a programmable buck/boost converter for supercapacitor charging and boost mode operation during input loss. Operating from a 36V input with a 550kHz switching frequency, it supports PLC mode. The device features comprehensive protection including OCP, SCP, OVP, and OTP, housed in a compact TSOT-23-8 package.

Feature Summary

• Integrates a dedicated buck converter for MCU supply and a flexible buck-boost converter for supercapacitor management
• Automatically switches between buck and boost modes to maintain output voltage during input power loss
• Includes full protection suite with hiccup-mode overcurrent, short-circuit, overvoltage, and overtemperature safeguards

Applications

• Smart meter backup power systems
• Supercapacitor charging and boosting circuits
• PLC (Power Line Communication) mode power supplies

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout and electrical characteristics, as suffixes may indicate variations in packaging or temperature range. Ensure the selected variant matches the required output voltage options and package type for your PCB layout. Cross-reference the Mouser or DigiKey part numbers to confirm current availability status and lead times before finalizing procurement plans.

Selection Notes

Select this component when a single-chip solution is required to replace traditional three-chip architectures involving separate buck, LDO, and boost regulators. It is suitable for designs needing high integration to reduce BOM cost and board space. Consider the 0.6A load capability of the primary buck output and the supercapacitor interface requirements when evaluating system power budgets.

Part Context

This part belongs to the MP5493 series from Monolithic Power Systems, specialized for power management in utility metering. It addresses the complexity of managing both main power delivery and backup energy storage within a single integrated circuit, simplifying the design process for critical infrastructure applications requiring data retention during outages.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.