MIC2003-1.2YML-TR

Overview

The MIC2003-1.2YML-TR is a high-side power switch from the MIC20XX family, manufactured by Microchip Technology. It features a typical on-resistance of 70mΩ at 5V and supports an operating voltage range of 2.5V to 5.5V. The device provides a fixed current limit of 1.2A, with integrated thermal protection and undervoltage lock-out (UVLO). It utilizes a 6-DFN (2x2) surface-mount package and operates within a temperature range of -40°C to 85°C.

Feature Summary

• High-side power distribution with low on-resistance
• Integrated thermal shutdown and fixed current limiting
• Automatic load discharge for capacitive loads
• Soft-start capability to prevent inrush current

Applications

• Digital televisions (DTV)
• Set-top boxes (STB)
• USB/IEEE 1394 power distribution
• Desktop and laptop PCs
• Game consoles and docking stations

Procurement Notes

Verify the specific current limit variant, as the MIC20XX family includes options for 0.5A, 0.8A, and 1.2A. Confirm the package type matches the design requirements, typically 6-DFN or SOT-23-5. Ensure compatibility with the system's logic levels for the enable pin, which can be configured for active-high or active-low operation depending on the specific sub-model suffix.

Selection Notes

Select this component when a compact, high-side switch with built-in protection is required for low-voltage digital loads. The 1.2A limit suits moderate power applications like peripheral interfaces. Consider the automatic load discharge feature if rapid capacitor discharge is necessary after fault conditions. Verify that the 70mΩ on-resistance meets the efficiency and thermal dissipation constraints of the target application.

Part Context

This part belongs to the MIC20XX family of current-limiting high-side power switches originally developed by Micrel and now produced by Microchip Technology. These devices are designed for general-purpose power distribution in consumer electronics and computing peripherals. The family offers various current ratings and package options to suit different board space and power requirements.

Replacement Considerations

Direct replacements include other MIC2003 variants with different current limits (e.g., MIC2003-0.5YML-TR for 0.5A) or packages (e.g., MIC2004 series for SOT-23-5). Cross-reference with other high-side switches from Microchip or Micrel that offer similar 70mΩ resistance and 1.2A current limits in compatible packages.

FAQ

What is the typical on-resistance of the MIC2003-1.2YML-TR?

The typical on-resistance is 70mΩ at a 5V supply voltage.

Does the MIC2003-1.2YML-TR support automatic load discharge?

Yes, it includes automatic load discharge functionality specifically designed for capacitive loads.

What protection features are integrated into this device?

It integrates thermal protection, undervoltage lock-out (UVLO), and a fixed 1.2A current limit.