MP161AGS-33-Z

Overview

The MP161AGS-33-Z is a non-isolated offline switching regulator from Monolithic Power Systems. It integrates a high-voltage startup circuit and an internal 3.3V LDO, supporting up to 2W of output power. The device operates with buck, boost, or flyback topologies and features adjustable frequency control. It includes comprehensive protection mechanisms such as over-current, over-voltage, and thermal shutdown. The component is housed in an SOIC-8 package and supports surface-mount installation.

Feature Summary

• Integrates a high-voltage startup circuit for direct connection to AC mains without external resistors
• Includes an internal low-dropout regulator (LDO) providing a stable 3.3V auxiliary supply
• Supports multiple converter topologies including buck, boost, and flyback configurations
• Features built-in protection against over-current, over-voltage, and thermal overload

Applications

• Low-power offline power supplies
• Standby power circuits for consumer electronics
• Auxiliary power generation in AC/DC adapters
• Battery chargers with limited power requirements

Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance and halogen-free status according to manufacturer declarations. Confirm the package variant matches the required SOIC-8 footprint. Ensure design compatibility with the integrated 3.3V LDO current limits. Cross-reference datasheet revision dates to validate pinout consistency before finalizing procurement orders.

Selection Notes

Select this component for applications requiring simplified bill of materials due to integrated startup and LDO functions. It is suitable for designs where space constraints favor the SOIC-8 package. Consider the maximum output power limit when sizing external components. Evaluate thermal performance requirements given the integrated nature of the regulator.

Part Context

This part belongs to the MP161 series of non-isolated offline regulators designed for cost-sensitive and compact power solutions. It differs from higher-power variants by its integrated LDO and lower maximum output capability. The series targets applications where isolation is not strictly required or where auxiliary power is needed alongside main regulation.

Replacement Considerations

Direct substitutes include other MP161 series variants with different voltage outputs or packaging options. Verify electrical parameter compatibility before substituting with similar offline regulators from other manufacturers.