Programmable Current Limit Switch
Programmable Current Limit Switch

The SGM2521/SGM2521A/SGM2522/SGM2522A are compact, feature rich eFuse with a full suite of protection functions. The wide operating voltage allows control of many popular DC buses. The precision ±7% current limit, at room temperature, provides excellent accuracy and makes the SGM2521/1A/2/2A well suited for many system protection applications.

Load, source and device protection are provided with multiple programmable features including over-current (OC), over-voltage (OV) and under-voltage (UV). 3% threshold accuracy for UV and OV, ensures tight supervision of bus voltages and eliminates the need for supervisor circuitry. Fault flag output (nFLT) is provided for system status monitoring and downstream load control.

The SGM2521/1A/2/2A are available in Green SOIC-8 and TDFN-2×3-8BL packages and operate over a temperature range of -40 to +85.


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  • Wide Input Voltage Range from 4.5V to 24V with Surge up to 30V

  • Extremely Low RDS(ON) for the Integrated Protection Switch:

      58mΩ (SOIC-8 Package)

      57mΩ (TDFN-2×3-8BL Package)

  • Programmable Soft-Start Time

  • Programmable Current Limit from 260mA to 2A

  • ±7% Current Limit Accuracy at TA = +25

  • Enable Interface Pin

  • Short-Circuit Protection

  • Over-Voltage Protection

  • Fault Output for Thermal Shutdown, Short-Circuit, UVLO and OVP

  • Thermal Shutdown Protection

      SGM2521/SGM2521A: Auto-Recovery

  • -40 to +85 Operating Temperature Range

  • Available in Green SOIC-8 and TDFN-2×3-8BL Packages


White Goods, Appliances

Set-Top Boxes, DVD and Gaming Consoles

HDD and SSD Drives

Smart Meters, Gas Analyzers

Smart Load Switches/USB Switches

Adapter Power Devices

Part Number Status Package Pins Pb-Free Temp Range
SGM2521AYTDC8G/TR Production TDFN-2×3-8BL 8 Y -40℃ to +85℃ Samples
SGM2521AYS8G/TR Production SOIC-8 8 Y -40℃ to +85℃ Samples
SGM2521YTDC8G/TR Production TDFN-2×3-8BL 8 Y -40℃ to +85℃ Samples
SGM2521YS8G/TR Production SOIC-8 8 Y -40℃ to +85℃ Samples