onsemi NCP120AMX210TCG

Overview

NCP120AMX210TCG from onsemi is a 150 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate VBIAS supply, delivering a fixed 2.10 V output with ±1.5% accuracy over −40°C to +85°C. It achieves 75 mV max dropout at 150 mA load and supports ultra-low bias current (80 µA typ), making it suitable for noise-sensitive, space-constrained portable applications such as smartphone I/O rails and camera sensor power domains.

For engineers reviewing the NCP120AMX210TCG 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 compatibility with 1 µF ceramic output capacitors without external compensation.

Technical Context

The NCP120AMX210TCG implements a dual-input NMOS-based LDO architecture: VIN supplies the pass element while VBIAS powers internal control circuitry-including reference, error amplifier, and enable logic-enabling stable regulation even when VIN approaches VOUT. Its under-voltage lockout (UVLO) on VBIAS ensures reliable startup only when bias supply exceeds 2.4 V with 0.2 V hysteresis.

Unlike PMOS LDOs, this topology decouples loop stability from output capacitor ESR, allowing use of small, low-ESR ceramic capacitors (1 µF min). The device integrates thermal shutdown (160°C trip), current limiting (200–600 mA), and monotonic soft-start to limit inrush, all within a 6-pin XDFN6 package with exposed thermal pad.

Key Specifications

Pinout & Package

XDFN6 package (Case 711AT), 1.2 mm × 1.2 mm × 0.4 mm, with exposed thermal pad soldered to PCB ground plane for optimal thermal performance (R_JA = 170°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP120AMX210TCG, the NCP120BMX210TCG offers identical regulation performance without discharge, while the XC6210B212MR-G trades size, dropout, and feature set for broader distributor availability - neither is pin-compatible, requiring layout changes.

Availability

NCP120AMX210TCG is available at Aetrix Electronics and suitable for smartphone I/O power, camera sensor rails, STB memory interfaces, and portable DVR logic supplies requiring stable component supply, consistent marking, and RoHS-compliant packaging.

Supply support for NCP120AMX210TCG 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 series is designed for ultra-low-noise, space-constrained portable power applications requiring dual-rail flexibility, active discharge, and sub-100 mV dropout - targeting next-generation mobile and imaging devices.

FAQ

What is the nominal output voltage of the NCP120AMX210TCG?

The NCP120AMX210TCG delivers a fixed 2.10 V output voltage with ±1.5% accuracy across −40°C to +85°C junction temperature. This value is laser-trimmed during manufacturing and does not require external feedback components. The "210" in the part number explicitly denotes the 2.10 V option, confirmed in the Ordering Information table on page 7 of the datasheet.

Does the NCP120AMX210TCG support active output discharge?

Yes, the NCP120AMX210TCG includes active output discharge functionality, which pulls the OUT pin to GND through an internal FET when the EN pin is driven low. This feature is exclusive to the "A" suffix variants (e.g., NCP120AMX210TCG) and is absent in "B" variants. The discharge resistance is specified as 150 Ω typical, enabling rapid rail collapse without external components.

What are the minimum and maximum input voltage requirements for the NCP120AMX210TCG?

The NCP120AMX210TCG accepts VIN from 0.8 V to 5.5 V, but operational headroom depends on load: minimum VIN = VOUT + VDO = 2.10 V + 0.075 V = 2.175 V at 150 mA. VBIAS must be ≥2.4 V (with 0.2 V UVLO hysteresis) and ≤5.5 V. Both supplies can be derived independently - e.g., VIN from a buck converter and VBIAS from a higher-voltage rail.

Can the NCP120AMX210TCG operate with a 1 µF ceramic output capacitor?

Yes, the NCP120AMX210TCG is explicitly characterized and guaranteed stable with a 1 µF ceramic output capacitor (effective capacitance), as stated in both the Features list and Applications Information section. This eliminates the need for larger or higher-ESR capacitors, reducing solution size and cost. Stability holds across temperature, DC bias, and tolerance variations per the effective capacitance specification.

What package type and dimensions does the NCP120AMX210TCG use?

The NCP120AMX210TCG uses the XDFN6 package (Case 711AT), measuring 1.2 mm × 1.2 mm × 0.4 mm with 0.4 mm pitch. It features six terminals plus an exposed thermal pad on the bottom, which must be soldered to the PCB ground plane. Mechanical drawings and mounting footprint details are provided on page 7 of the datasheet, confirming compatibility with standard 0201-sized land patterns.