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MIC2549A-1YM-TR
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Product Detailed Parameters
- Description：IC PWR SWITCH N-CHAN 1:1 8SOIC
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Switch Type：USB Switch
- Number of Outputs：1
- Ratio - Input:Output：1:01
- Output Configuration：High Side
- Output Type：N-Channel
- Interface：On/Off
- Voltage - Load：2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd)：Not Required
- Current - Output (Max)：3A
- Rds On (Typ)：35mOhm
- Input Type：Non-Inverting
- Features：Slew Rate Controlled, Status Flag
- Fault Protection：Current Limiting (Adjustable), Over Temperature, Reverse Current
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Grade：-
- Qualification：-
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Overview
The MIC2549A-1YM-TR is a single-channel high-side power switch IC manufactured by Microchip Technology. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an output current up to 500 mA. The device features a maximum on-resistance of 50 mΩ and includes programmable current limiting from 500 mA to 3 A. Key protection mechanisms include over-temperature latch functionality, with a maximum turn-on time of 5 ms and a maximum blanking time of 25 μs. It is housed in an 8-SOIC package and functions across a temperature range of -40°C to +85°C.
Feature Summary
- Integrates programmable current limit capability for flexible load protection
- Provides over-temperature latch protection to prevent thermal damage
- Features low on-resistance for efficient power distribution
- Includes status flag output for fault monitoring
Applications
- USB port power distribution and switching
- Peripheral device power management
- Battery-powered equipment load switching
- Over-current protection circuits
Procurement Notes
Verify the specific suffix 'TR' indicates tape and reel packaging when sourcing. Confirm the manufacturer is Microchip Technology, noting historical Micrel branding in older documentation. Ensure the SOIC-8 package dimensions match your PCB footprint requirements. Check RoHS compliance status for environmental regulations. Validate the operating temperature range against your application's thermal environment.
Selection Notes
Select this component for applications requiring precise current limiting and thermal protection in a compact surface-mount package. Consider the 50 mΩ on-resistance for efficiency needs. Evaluate the programmable current limit range against expected load peaks. Ensure the 2.7 V to 5.5 V supply range aligns with system voltage. Compare against similar switches if higher channel counts or different packages are needed.
Part Context
This part belongs to the MIC254x series of high-side power switches designed for USB and peripheral power distribution. It offers integrated protection features commonly required in portable electronics and industrial interfaces. The series provides various channel counts and package options to suit different design constraints while maintaining consistent protection logic.
Replacement Considerations
Check the MIC2544-1YM-TR for similar single-channel high-side switching with comparable protection features. Verify pin compatibility and electrical parameters before substitution. Consult official Microchip documentation for cross-reference recommendations.
