NCP81071BMNTXG

The NCP81071BMNTXG is an ON Semiconductor NCP-series switching regulator (buck converter) in an 8-pin MNTXG package. It is designed to generate a regulated lower voltage from a higher input for power rails in portable and automotive electronics.
Key features:
- Adjustable or fixed output via feedback network
- Enable/shutdown control
- Soft-start and current limit
- Thermal shutdown and protection against short-circuits/overvoltage
- High efficiency across load ranges
- Small, RoHS-compliant 8-pin package
Typical applications:
- PMICs and voltage rails for CPUs, GPUs, memory, microcontrollers
- FPGA/ASIC supply rails
- Automotive and industrial power modules
How to use:
- Connect VIN and GND
- Provide external energy-storage components (inductor and output capacitor); a diode or use a synchronous topology as per the variant
- Set VOUT with a feedback divider and tie EN high to enable
- Follow datasheet layout guidelines (short guidance loops, solid grounding)
Note: Check the datasheet for exact pinout, electrical specs, and recommended external components.

I don’t have the exact datasheet memorized, but NCP81071BMNTXG is a buck regulator in the NCP8107x family. Typical features include:
- High-efficiency step-down (buck) regulator with current-mode control
- Wide input voltage range
- Adjustable output voltage via resistor divider
- Integrated high-side switch (no external MOSFET required)
- Enable/shutdown pin with undervoltage lockout
- Soft-start to limit inrush and output overshoot
- Overcurrent/short-circuit protection (current limit)
- Thermal shutdown protection
- Undervoltage lockout (UVLO)
- Power-good/status output
- PWM/PFM operation for good light-load efficiency
- Small, RoHS-compliant packaging suitable for compact boards
For exact electrical specs (input range, output ranges, efficiency, current limit, package details), please refer to the official datasheet.

QFN-16 (4x4 mm) lead-free package.

Pin count: 8 pins.
Function: Single-channel step-down (buck) DC-DC converter used to generate a regulated lower voltage from a higher input, with typical pins for VIN, SW, GND, FB, EN, and related control/bootstrapped nodes.

Manufacturer: ON Semiconductor (onsemi).
What kind of company: An American multinational semiconductor company that designs and manufactures integrated circuits and other microelectronics (including power management ICs, sensors, and discretes) for automotive, industrial, communications, and consumer markets. Headquarters: Phoenix, Arizona.

Application areas:
- Portable battery-powered devices (handhelds, wearables)
- Embedded systems and IoT
- Consumer electronics
- Automotive and industrial power-management subsystems
- Power adapters and compact VRMs requiring efficient DC-DC conversion

Direct one-to-one equivalents for NCP81071BMNTXG aren’t published. To find substitutes: obtain its electrical specs (input range, output voltage/current, package). Use distributor cross-reference tools (Digi-Key, Mouser, Octopart) to locate buck regulators with identical specs and footprint. If a drop-in is required, contact ON Semiconductor for recommended substitutes. As alternatives, look for other manufacturers’ buck regulators with matching input/output range and package in similar form factors.