onsemi NCP154MX280280TAG

Overview

NCP154MX280280TAG from onsemi is a dual-output, 300 mA low-dropout linear voltage regulator with independent IN1/IN2 inputs and fixed 2.8 V / 2.8 V outputs. It delivers ultra-low noise (75 µV_RMS, 10 Hz–100 kHz), high PSRR (75 dB at 1 kHz), and very low dropout (160 mV typical at 300 mA) - optimized for RF-sensitive battery-powered applications such as smartphones and wireless handsets.

For engineers reviewing the NCP154MX280280TAG datasheet, pinout, applications, or equivalent options, key selection criteria include dual-channel enable control, active output discharge (50 Ω), thermal shutdown (160 °C), stable operation with 1 µF ceramic capacitors, and XDFN8 1.2 × 1.6 mm package constraints.

Technical Context

The NCP154MX280280TAG integrates two independent PMOS LDO regulators sharing ground but with separate input, enable, and output pins. Each channel features adaptive ground current logic to minimize quiescent current (55 µA/channel typical) under light load while maintaining regulation accuracy (±2% for V_OUT > 2 V).

Its architecture includes dedicated EN1/EN2 logic with 0.9 V turn-on / 0.4 V turn-off thresholds, active discharge transistors per channel, and independent current limiting (400 mA typ.) and thermal shutdown (160 °C, 20 °C hysteresis) protection - all implemented without external components beyond 1 µF ceramic C_IN/C_OUT.

Key Specifications

Pinout & Package

XDFN8 1.2 × 1.6 mm package (Case 711AS) with exposed thermal pad (EP) tied to GND; 0.4 mm pitch; requires soldering EP to PCB ground plane for thermal performance (θ_JA = 160 °C/W on 1 oz FR4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A202828YCKR and BD75L28G-TR, the NCP154MX280280TAG uniquely combines dual independent inputs, active discharge per channel, and 75 dB PSRR - enabling compact, robust RF power delivery without supplemental components.

Availability

NCP154MX280280TAG is available at Aetrix Electronics and suitable for smartphone core power, wireless handset RF bias, and tablet display interface applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP154MX280280TAG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP154MX280280TAG belongs to onsemi's high-performance LDO family designed specifically for space-constrained, battery-powered RF systems requiring ultra-low noise, high PSRR, and dual-rail flexibility.

FAQ

What are the exact output voltages of the NCP154MX280280TAG?

The NCP154MX280280TAG provides two fixed, identical output voltages of 2.8 V each - confirmed by Table 5 (Ordering Information) in the official datasheet. Output accuracy is ±2% over −40°C to +85°C for V_OUT > 2 V, and the device maintains regulation down to 1.9 V input. This dual 2.8 V configuration is explicitly assigned to the "MX280280" suffix in the part number.

Does the NCP154MX280280TAG require external capacitors for stability?

Yes - the NCP154MX280280TAG requires one 1 µF X5R or X7R ceramic capacitor per input (IN1, IN2) and one per output (OUT1, OUT2), placed as close as possible to their respective pins. The datasheet confirms stability with ≥0.33 µF effective capacitance, but 1 µF is the recommended value to ensure margin across temperature, DC bias, and PCB layout variations.

How does the active discharge function work on the NCP154MX280280TAG?

When EN1 or EN2 falls below 0.4 V, the corresponding channel's active discharge transistor engages, pulling its OUT pin to GND through a 50 Ω internal resistor. This discharges 1 µF loads in under 1 ms and prevents floating outputs that could cause downstream latch-up or leakage - a feature confirmed in Table 1 (Pin Function Description) and the Enable Operation section of the datasheet.

What is the maximum junction temperature and thermal protection behavior of the NCP154MX280280TAG?

The NCP154MX280280TAG triggers thermal shutdown at 160 °C (typical) and resets at 140 °C (20 °C hysteresis), as specified in Table 4 (Electrical Characteristics). Protection operates independently per channel: an overload on OUT1 will disable only that channel while OUT2 continues regulating - verified in the Thermal Shutdown section and Figure 55 (Short Circuit and Thermal Shutdown).

Can the NCP154MX280280TAG operate with input voltage below 2.8 V?

Yes - the NCP154MX280280TAG supports input voltages from 1.9 V to 5.25 V, per Table 4. With a 2.8 V output and 160 mV typical dropout, it can regulate down to VIN = 2.96 V at full 300 mA load. At lighter loads, dropout decreases further (e.g., ~60 mV at 1 mA), enabling operation even with VIN as low as 2.86 V while maintaining regulation - confirmed in Figure 14 (Dropout vs. Output Current).