onsemi NCP154MX180290TAG

Overview

NCP154MX180290TAG from onsemi is a dual-output, 300 mA low-dropout linear voltage regulator with independent input pins (IN1/IN2), fixed output voltages of 1.8 V and 2.9 V, ultra-low noise (75 µV_RMS, 10 Hz–100 kHz), and 75 dB PSRR at 1 kHz - designed for RF-sensitive battery-powered applications including smartphone baseband and RF power amplifiers.

For engineers reviewing the NCP154MX180290TAG datasheet, pinout, applications, or equivalent options, key selection criteria include dual-channel independent enable control (EN1/EN2), active output discharge (50 Ω), thermal shutdown (160 °C), stable operation with 1 µF ceramic output capacitors, and XDFN8 1.2 × 1.6 mm package constraints.

Technical Context

The NCP154MX180290TAG integrates two fully independent LDO channels sharing only ground and thermal coupling - each with dedicated PMOS pass transistors, bandgap references, current-limit circuitry, and active discharge paths. Its adaptive ground current feature reduces quiescent current to 55 µA per channel under light load, while maintaining 140–390 mV typical dropout across its 1.8 V / 2.9 V outputs at 300 mA.

Each channel features separate enable logic (EN1/EN2 thresholds: 0.4 V low, 0.9 V high), independent short-circuit protection (400 mA typ. current limit), and thermal shutdown with 20 °C hysteresis. The device achieves ultra-low noise without external bypass capacitors and remains stable with 0.33 µF minimum C_OUT (X5R/X7R ceramic).

Key Specifications

Pinout & Package

Package: XDFN8 1.2 × 1.6 mm (Case 711AS), 0.4 mm pitch, exposed thermal pad (EP) tied to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output LDO applications.

Compared with XC6216D182MR-G and BD73220GUL, the NCP154MX180290TAG uniquely delivers matched 1.8 V / 2.9 V outputs, 75 dB PSRR, and active discharge in a single XDFN8 package - making it optimal for compact, noise-critical dual-rail systems where layout area and RF integrity are prioritized.

Availability

NCP154MX180290TAG is available at Aetrix Electronics and suitable for smartphone baseband power, RF amplifier bias, and wireless audio SoC applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP154MX180290TAG 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.

The NCP154 product line is engineered for ultra-low-noise, dual-rail power delivery in battery-operated portable electronics - emphasizing PSRR, dropout, and quiescent current optimization for RF and mixed-signal subsystems.

FAQ

What are the exact output voltages of the NCP154MX180290TAG?

The NCP154MX180290TAG provides precisely trimmed fixed outputs: OUT1 delivers 1.8 V ±2% and OUT2 delivers 2.9 V ±2% across −40°C to +85°C junction temperature. These values are confirmed in Table 5 (Ordering Information) of the onsemi datasheet and are laser-trimmed at wafer test - no external feedback resistors are required.

Does the NCP154MX180290TAG require external capacitors for stability?

Yes - the NCP154MX180290TAG requires a minimum 1 µF X5R or X7R ceramic capacitor from each output (OUT1, OUT2) to GND, placed as close as possible to the pins. It is stable down to 0.33 µF, but 1 µF is recommended to ensure robustness across temperature, DC bias, and aging. Input capacitors (1 µF) are also required at IN1 and IN2.

How does the active discharge function work on the NCP154MX180290TAG?

When EN1 or EN2 falls below 0.4 V, the corresponding channel's active discharge transistor turns on, pulling OUT1 or OUT2 to GND through a 50 Ω internal resistor. This discharges the output capacitor rapidly (e.g., <1 ms for 1 µF), preventing floating voltages or unintended wake-up in downstream circuits - a critical feature for sequenced power-down in portable systems.

What is the maximum input voltage the NCP154MX180290TAG can handle?

The NCP154MX180290TAG supports an absolute maximum input voltage of 6 V on IN1 and IN2 (per Table 2, Absolute Maximum Ratings). However, the recommended operating range is 1.9 V to 5.25 V. Exceeding 5.25 V may degrade long-term reliability or trigger overvoltage stress not covered by standard qualification testing.

Is the NCP154MX180290TAG RoHS-compliant and Pb-free?

Yes - the NCP154MX180290TAG is explicitly marked as a Pb-free device in the datasheet (Features section) and uses the "G" suffix in its marking code per onsemi's Pb-free packaging standard. It complies with RoHS Directive 2011/65/EU and is suitable for lead-free reflow soldering processes per J-STD-020.