onsemi NCP120AMX080TCG

Overview

NCP120AMX080TCG from onsemi is a 150 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate VBIAS supply, delivering a fixed 0.80 V output. It achieves ±1.5% output accuracy over −40°C to +85°C, 75 mV max dropout at 150 mA, and ultra-low bias current (80 µA typ), optimized for noise-sensitive, space-constrained portable applications such as smartphone core logic rails.

For engineers reviewing the NCP120AMX080TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), active output discharge capability, XDFN6 1.2 mm × 1.2 mm package, and PSRR of 70 dB (VIN-to-VOUT) and 80 dB (VBIAS-to-VOUT) at 1 kHz.

Technical Context

The NCP120AMX080TCG implements a dual-input VLDO architecture: VIN supplies the pass element while VBIAS powers internal control circuitry, enabling stable regulation even when VIN approaches VOUT. Its NMOS topology reduces sensitivity to output capacitor ESR and improves transient response versus PMOS LDOs.

It integrates undervoltage lockout (UVLO) on VBIAS with 1.6 V threshold and 0.2 V hysteresis, thermal shutdown at 160°C (releasing at 140°C), and logic-level enable with 0.9 V high-threshold. The device supports active output discharge only in "A"-suffix variants like NCP120AMX080TCG.

Key Specifications

Pinout & Package

Package: XDFN6 (Case 711AT), 1.2 mm × 1.2 mm × 0.4 mm, thermally enhanced with exposed pad soldered to ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout voltage regulator applications.

Compared with NCP120BMX080TCG and TPL7407LDR, the NCP120AMX080TCG uniquely combines 0.80 V fixed output, active discharge, dual-rail noise isolation, and sub-100 mV dropout in a 1.2 mm² footprint - making it optimal for sequenced, noise-critical, space-constrained mobile SoC power domains.

Availability

NCP120AMX080TCG is available at Aetrix Electronics and suitable for smartphone application processors, LPDDR4 I/O rails, and wearable sensor node power requiring stable component supply, full RoHS compliance, and guaranteed long-term availability in XDFN6 packaging.

Supply support for NCP120AMX080TCG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.

The NCP120 product line delivers ultra-low-noise, dual-rail VLDO regulators specifically engineered for post-regulation in battery-powered mobile and portable devices where precision, size, and power integrity are critical.

FAQ

What is the maximum input voltage for the NCP120AMX080TCG?

The NCP120AMX080TCG supports an absolute maximum input voltage (VIN) of 6 V per its Absolute Maximum Ratings table. However, for reliable operation within specifications, the recommended operating VIN range is 0.8 V to 5.5 V - with minimum VIN determined by dropout: VIN ≥ 0.80 V + 75 mV = 0.875 V at 150 mA load. Exceeding 6 V risks permanent damage.

Does the NCP120AMX080TCG require external capacitors, and what values are recommended?

Yes, the NCP120AMX080TCG requires three external ceramic capacitors: 1 µF on IN, ≥0.1 µF on BIAS, and 1 µF on OUT (effective capacitance). These values ensure stability, noise suppression, and proper startup behavior. All capacitors must be placed as close as possible to their respective pins using direct copper connections - vias or long traces degrade performance and may cause oscillation.

How does the active output discharge function work in the NCP120AMX080TCG?

The NCP120AMX080TCG integrates an internal 150 Ω pull-down resistor between OUT and GND that activates automatically when the EN pin is driven low. This discharges the output capacitor rapidly, preventing residual voltage from interfering with system reset sequencing or causing latch-up in downstream logic. This feature is exclusive to "A"-suffix variants and is absent in "B"-suffix parts like NCP120BMX080TCG.

What is the purpose of the separate BIAS pin on the NCP120AMX080TCG?

The BIAS pin supplies power exclusively to the NCP120AMX080TCG's internal reference, error amplifier, and control circuitry - independent of the main IN rail. This separation enables high PSRR (80 dB) against noise on the bias source, allows optimization of control-loop stability regardless of IN rail quality, and permits use of cleaner, higher-voltage rails (e.g., 3.3 V) to power sensitive analog blocks while regulating low-noise 0.80 V from a noisier, lower-voltage source.

Is the NCP120AMX080TCG RoHS compliant and lead-free?

Yes, the NCP120AMX080TCG is fully RoHS compliant and Pb-free, halogen-free, and BFR-free as stated in its datasheet features list and ordering information. It uses XDFN6 (Case 711AT) packaging with lead-free matte tin terminations, qualified per JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), and suitable for standard reflow soldering profiles.