NCP511SN33T1G

NCP511SN33T1G is a fixed-threshold 3.3 V voltage supervisor (reset IC) from On Semiconductor. It monitors the supply rail and asserts a microcontroller reset when VCC falls below 3.3 V or during power-up/power-down, ensuring proper MCU initialization. It comes in a small 3-pin SOT-23 (T1G) package with a reset output suitable for direct digital loading. Because the threshold is fixed, no external resistor network is needed to set the trip point. Benefits include low quiescent current, fast response to voltage changes, and reliable power-on reset for battery-powered and mixed-signal systems. Typical applications are MCU/FPGA/CPLD reset generation in portable or embedded devices. If you need a different threshold or additional features, consider other NCP511 variants. Always check the datasheet for exact pinout, timing, and operating temperature.

NCP511SN33T1G is a fixed 3.3 V LDO regulator (≈100–150 mA) in SOT-23. Equivalents include other 3.3 V fixed LDOs with similar current, such as: TI LM1117-3.3 / TLV1117-3.3; Analog Devices ADP3333; Microchip MIC5319-3.3; Microchip MIC5365-3.3; Torex XC6206P332MR; AMS1117-3.3 (footprint varies).

Here are the typical features of the NCP511SN33T1G (3.3 V fixed output LDO in SOT-23-5):
- Fixed 3.3 V output LDO
- Enable input for shutdown control
- Ultra-low quiescent current
- Low dropout voltage
- Overcurrent/short-circuit protection
- Thermal shutdown protection
- Stable with ceramic output capacitors
- Wide operating temperature (commonly -40°C to 125°C)
- RoHS-compliant, package: SC-70/SOT-23-5 (NCP511SN33T1G)
- Suitable for compact, battery-powered and embedded applications
Note: Always refer to the official datasheet for exact electrical specs and recommended external capacitors.

Pin count: 3 pins (VDD, GND, RESET).
Function: 3.3V voltage supervisor (power-on reset) device. It monitors the 3.3V rail and outputs a reset signal (typically active-low) to microcontrollers/system logic, ensuring proper reset during power-up/down and undervoltage conditions.

- Manufacturer: ON Semiconductor (ON Semiconductor Corporation).
- What kind of company: A multinational semiconductor company that designs and manufactures a broad range of electronic components and integrated circuits, including power management devices, regulators, discretes, sensors, and related technologies for automotive, industrial, communications, consumer, and computing markets.

- Microcontroller/processor reset supervision for 3.3 V logic
- Power-on reset and brown-out protection in embedded systems
- Reset generation for SoCs, memories, FPGAs, and digital peripherals
- Battery-powered/portable devices needing undervoltage detection and safe startup
- Consumer electronics, IoT, networking gear, and industrial sensors requiring reliable reset signaling
Note: NCP511SN33T1G is a 3.3 V voltage monitor/reset supervisor used to ensure proper operation when the 3.3 V supply fluctuates.

SOT-23-3 package.