NCP301LSN27T1G

NCP301LSN27T1G is an ON Semiconductor fixed-threshold voltage supervisor (reset IC). It monitors the supply voltage and asserts a reset output when Vcc falls below its 2.7 V threshold (the “27” in the part number) and releases reset once Vcc is above the threshold with built-in hysteresis.
Key points
- Purpose: provide brown-out/reset protection for microcontrollers and digital logic without external components.
- Threshold: fixed at 2.7 V.
- Output: reset signal to the MCU (typical implementations use an active reset output; check exact polarity in the datasheet).
- Package: LSN (Leadless Small Outline No-lead), 3-pin device (VDD, GND, RESET).
- Environment: suitable for low-power, battery-powered and space-constrained designs; wide operating temperature (typically -40 to +125°C).
- Benefits: simple, compact, low quiescent current, fast response to supply changes.
Applications
- Microcontroller reset/brown-out protection
- System power-on reset for portable electronics
- Any design needing reliable reset without external components
For exact pinout, timing details, current consumption, and packaging/tape options, consult the NCP301LSN27T1G datasheet.

Here are the typical features of NCP301LSN27T1G (On Semiconductor LED driver):
- Integrated LED constant-current regulator with MOSFET
- External resistor sets LED current
- Wide input voltage range
- High efficiency; low quiescent current
- Enable input and/or dimming control for brightness adjustment
- Built-in protections: undervoltage lockout, overcurrent/short-circuit protection, overvoltage protection, and thermal shutdown
- Fault auto-retry with hiccup behavior
- Small 8-pin LSN package (compact footprint; RoHS compliant)

SOT-23-3 (SC-70-3) package.

- Pin count: 3 pins (VCC, GND, RESET output)
- Function: 2.7 V threshold voltage supervisor (reset IC). Monitors VCC and asserts (drives) a reset signal to a microcontroller when VCC falls below 2.7 V. No external components required.

- Manufacturer: ON Semiconductor (ON Semiconductor Corp.)
- What kind of company: An American multinational semiconductor company that designs and manufactures integrated circuits, discrete components, and power/sensor solutions.

NCP301LSN27T1G is a high-side load switch with current limit and protections. Applications include:
- High-side switch for low-voltage rails in battery-powered devices
- Power-distribution/protection in portable electronics
- USB/charging ports needing overcurrent protection
- Input protection for DC–DC converters
- General low-voltage systems requiring UVLO, current limit and thermal shutdown

NCP301LSN27T1G is a 2.7 V threshold voltage supervisor/reset IC in an LSN package. Equivalent parts (2.7 V reset supervisors) from major vendors include:
- TI TLV803-2.7 (or TLV803B-2.7)
- Microchip MCP1316-270 (2.7 V option)
- Maxim MAX809-2.7/MAX810-2.7
Notes: verify exact package (LSN), output type (push-pull/open-drain), reset polarity, and timing in each datasheet before substituting.