NCP164AMTADJTAG

Introduction in brief:
- What it is: ON Semiconductor NCP164AMTADJJ is an adjustable buck (step-down) switching regulator from the NCP164 family, offered in a compact MTADJ package. It provides a regulated lower voltage from a higher Vin.
- How it works: It integrates the high-side switching transistor and control circuitry. The output is set with an external resistor divider tied to the feedback pin; feedback reference is typically around 1.25 V. It uses current‑mode control at a fixed switching frequency.
- What you need around it: external inductor, Schottky catch diode (for non-synchronous designs), input and output capacitors, and the resistor network to set Vout. An enable pin (EN) is usually available to turn the regulator on/off.
- Protections and limits: includes protections such as overcurrent/short-circuit, undervoltage lockout, and thermal shutdown.
- Typical applications: compact power rails for battery-powered devices, portable electronics, USB-powered gadgets, and other space-constrained DC-DC conversion needs.
- Note: For exact pinout, package details, electrical characteristics, and typical application circuits, refer to the NCP164AMTADJJ data sheet.

Here are the typical features of NCP164AMTADJTAG (On Semiconductor buck regulator family, adjustable version):
- High-voltage input range suitable for automotive/industrial (adjustable output via external divider)
- Adjustable output voltage using feedback resistors
- Fixed-frequency current-mode buck control
- Enable/input control for sleep or disable
- Internal overcurrent/short-circuit protection
- Thermal shutdown protection
- Undervoltage lockout (UVLO)
- Soft-start to limit output inrush
- Low quiescent current in both ON and OFF states
- Compact packaging options (MT/MTAdj variants in small packages such as SOT-23/MSOP family)
- Suitable for applications requiring simple, efficient step-down with minimal external components
Note: For exact electrical specs (input range, output range, efficiency, current limit, and package options) consult the latest On Semiconductor datasheet for NCP164AMTADJTAG.

It’s in a SOT-23-5 (5-pin) package, for the adjustable (ADJ) version.

- Pin count: 5 pins (SOT-23-5 package, MT suffix).
- Function: NCP164A is a buck (step-down) switching regulator with adjustable output (ADJ). Pins:
- VIN: input supply
- GND: ground
- LX (SW): switch node connected to the inductor
- FB (ADJ): feedback to set output voltage via external resistor divider
- EN/UVLO: enable input with undervoltage lockout
This device regulates from VIN to a lower VOUT using the external inductor and capacitor.

Manufacturer: ON Semiconductor (ON).
What kind of company: A global American semiconductor company that designs and manufactures electronic components and integrated circuits, including power management ICs, sensors, and other semiconductor solutions for automotive, industrial, and consumer markets.

Equivalent products (closest pin/power match; verify package and pinout):
- ON Semiconductor: NCP164A/NCP164AN (same family)
- TI: LM2596-ADJ / LM2596S-ADJ
- TI: LM2675-ADJ
- Monolithic Power Systems: MP1584EN
- MC34063A (Legacy buck regulator)
- AP34063 (Diodes Inc., MC34063-compatible)
Note: exact drop-in availability depends on package, pinout, and switching frequency—check specs and footprints before substitution.