MIC94040YFL-TR

The MIC94040YFL-TR is Microchip/Micrel’s single-channel high-side load switch with current‑limit protection. It sits between a supply rail and a load and is controlled by an on/off input to gate current to the load. The device integrates a power MOSFET and control logic, offering protection features such as current-limit/short-circuit protection, undervoltage lockout, and thermal shutdown. The YFL suffix refers to a specific package variant (8-pin) in Tape-and-Reel. Typical applications include power gating for microcontrollers, sensors, and other low-voltage loads in portable, consumer, and automotive systems. Benefits include a compact footprint, fast fault response, and reduced BOM since protection and switching are integrated. For exact electrical specs (input range, current limit, quiescent current, enable polarity, pinout) consult the MIC94040YFL-TR datasheet and packaging documentation.

Here are the main features of MIC94040YFL-TR (typical for the MIC94040 family):
- Four independently controlled high-side load switches
- Wide operating input/logic range suitable for battery-powered systems
- Per-channel current limit and overcurrent protection
- Thermal shutdown protection
- Undervoltage lockout for reliable operation
- Reverse-current protection when a switch is off
- Output discharge when a channel is disabled (good for capacitive loads)
- Low quiescent current; fast turn-on/turn-off
- Small package and Tape & Reel (TR) assembly variant (YFL-TR)
Note: Exact electrical numbers (voltage range, current limit, Rds(on)) are in the datasheet.

Pin count: 8 pins.
Function: A single-channel high-side load switch with current limit and enable control (power-distribution switch with protections such as current-limit and thermal shutoff to switch power to a load).

Manufacturer: Microchip Technology Inc. (the Micrel MIC series originated there and Microchip acquired Micrel in 2015).
What kind of company: Microchip is a global semiconductor company that designs, develops, manufactures, and sells integrated circuits, including microcontrollers, analog ICs, memory, and related products. It’s a public, multinational supplier of ICs.

MIC94040YFL-TR is a high-side load switch with protection features. Typical application areas include:
- Power-gating for microcontrollers and peripherals in portable/battery-powered devices
- LED backlight/indicator power switching
- Automotive and industrial control circuits requiring reverse-current, overcurrent, and thermal protection
- Hot-swap/inrush-controlled power distribution
- Power sequencing for complex ICs (ASICs/FPGA)
- Any load where safe, automatic switching with protection is needed
Note: TR denotes tape-and-reel packaging; YFL is package code.

In a 5-pin SOT-23 package (SOT-23-5), Tape & Reel (TR).