onsemi NCP120BMX210TCG

Overview

NCP120BMX210TCG from onsemi is a 150 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate bias rail (VBIAS), delivering a fixed 2.10 V output with ±1.5% accuracy over −40°C to +85°C, 75 mV max dropout at 150 mA, and ultra-low 80 µA typical bias current - designed for noise-sensitive, space-constrained portable applications such as smartphone I/O rails and camera sensor power.

For engineers reviewing the NCP120BMX210TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), absence of active output discharge (distinguishing it from NCP120A variants), XDFN6 1.2 mm × 1.2 mm package constraints, and compatibility with 1 µF ceramic output capacitors.

Technical Context

The NCP120BMX210TCG uses an NMOS pass transistor powered by VIN while internal control circuitry draws from VBIAS, enabling stable regulation even when VIN approaches VOUT. Its dual-supply architecture decouples input supply noise sensitivity from bias rail stability, improving PSRR (80 dB from VBIAS to VOUT at 1 kHz).

It features logic-level enable (VEN(H) = 0.9 V), thermal shutdown (160°C trip), undervoltage lockout on VBIAS (1.6 V threshold with 0.2 V hysteresis), and no integrated active discharge - confirmed by datasheet Figure 2 block diagram footnote and ordering table distinction between "A" (discharge) and "B" (non-discharge) variants.

Key Specifications

Pinout & Package

XDFN6 package (Case 711AT), 1.2 mm × 1.2 mm × 0.4 mm, with exposed thermal pad soldered to ground plane for thermal performance (R_JA = 170°C/W). Pin 2 is NC (not internally connected); thermal pad must be grounded.

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 omits active discharge for simpler sequencing control; compared with TPL7407LDR, it delivers lower dropout, superior PSRR, and dedicated bias rail isolation - making it optimal for noise-sensitive, single-rail 2.1 V applications in ultra-compact layouts.

Availability

NCP120BMX210TCG is available at Aetrix Electronics and suitable for smartphone I/O power, camera sensor bias, tablet processor interfaces, DVR video encoding, and portable medical device rails requiring stable component supply with RoHS-compliant, halogen-free packaging.

Supply support for NCP120BMX210TCG 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, serving automotive, industrial, cloud, and portable markets with discrete, analog, and power management solutions.

The NCP120 series is part of onsemi's precision low-dropout regulator portfolio, engineered specifically for space-constrained, noise-sensitive portable applications requiring dual-rail flexibility and ultra-low quiescent current.

FAQ

What is the output voltage tolerance of the NCP120BMX210TCG over temperature?

The NCP120BMX210TCG provides ±1.5% output voltage accuracy across the full operating junction temperature range of −40°C to +85°C. At 25°C, accuracy tightens to ±0.5%. This is specified in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions including VBIAS ≥ (VOUT + 1.6 V) and 1 mA ≤ IOUT ≤ 150 mA. The NCP120BMX210TCG maintains this tolerance without external trimming or calibration.

Does the NCP120BMX210TCG include active output discharge functionality?

No, the NCP120BMX210TCG does not include active output discharge. This feature is exclusive to the "A" suffix variants (e.g., NCP120AMX210TCG), as confirmed by the datasheet's Figure 2 block diagram footnote and the Ordering Information table distinguishing "A" (output active discharge) from "B" (non-active discharge) variants. The NCP120BMX210TCG relies on natural discharge through the load or external circuitry.

What is the minimum recommended input voltage for the NCP120BMX210TCG at 150 mA load?

The minimum input voltage for the NCP120BMX210TCG at 150 mA is determined by its maximum dropout voltage of 75 mV. With a fixed 2.10 V output, the minimum VIN is 2.10 V + 0.075 V = 2.175 V. This value is validated in the Electrical Characteristics table under "VIN Dropout Voltage" and confirmed in Figure 4 showing VDO ≤ 75 mV across temperature at IOUT = 150 mA. Below this, regulation is not guaranteed.

Can the NCP120BMX210TCG operate with a VBIAS voltage equal to the output voltage?

No - the NCP120BMX210TCG requires VBIAS to be at least (VOUT + 1.35 V), per the Electrical Characteristics table "Operating Bias Voltage Range". For the NCP120BMX210TCG's 2.10 V output, minimum VBIAS is 3.45 V. Operating VBIAS at or below VOUT violates the specification and risks UVLO activation or improper internal circuit biasing, as VBIAS powers the reference and error amplifier independently of VIN.

What package type and dimensions does the NCP120BMX210TCG use?

The NCP120BMX210TCG uses the XDFN6 package (Case 711AT), measuring 1.20 mm × 1.20 mm × 0.40 mm with 0.4 mm pitch. It features six terminals plus an exposed thermal pad on the bottom. Mechanical drawings on page 7 of the datasheet confirm pin 1–6 layout and pad coplanarity requirements. The "TCG" suffix denotes Pb-free, halogen-free, RoHS-compliant packaging with tape-and-reel shipping (5000 units/reel post-Oct 2022).