onsemi NCP2860DM300R2

Overview

NCP2860DM300R2 from onsemi is a 300 mA, 3.0 V fixed-output, very low-noise low-dropout linear regulator in Micro8 package. It delivers stable 3.0 V output from 3.2–6.0 V input with 150 mV dropout at 300 mA, 60 µV_rms output noise (10 Hz–100 kHz), and 60 dB PSRR at 1 kHz - optimized for audio amplifier supply rails in portable devices.

For engineers reviewing the NCP2860DM300R2 datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low noise floor, fault-indicator functionality, shutdown current of 10 nA, programmable SET pin interface, and thermal/short-circuit protection for battery-powered audio systems.

Technical Context

The NCP2860DM300R2 integrates a 0.5 Ω P-channel MOSFET pass device enabling near-zero bias current drive and sub-1 µA quiescent operation. Its transconductance error amplifier provides load and line regulation without external compensation.

It features a dedicated open-drain FAULT pin that asserts low when input-to-output differential falls below dynamic dropout threshold, plus a SET pin supporting both fixed 3.0 V operation (via GND tie) and adjustable output via resistor divider using 1.244 V internal reference.

Key Specifications

Pinout & Package

Package: Micro8 (Case 846A), surface-mount, 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, 0.7 mm max height - compatible with standard 0.5 mm stencil apertures and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO regulator applications.

Compared with MCP1703T-3002E/MB and TLS850F3ELVSE, the NCP2860DM300R2 offers superior fault visibility via open-drain FAULT pin and tighter dropout (150 mV) at rated current - critical for maximizing runtime in single-cell Li-ion portable designs where every millivolt of headroom matters.

Availability

NCP2860DM300R2 is available at Aetrix Electronics and suitable for cellular phone audio subsystems, handheld test equipment, wireless headset analog partitions, and medical sensor signal chains requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for NCP2860DM300R2 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP2860DM300R2 belongs to onsemi's precision analog LDO portfolio, engineered specifically for noise-sensitive portable electronics where audio fidelity, battery efficiency, and fault-aware power management are co-primary design goals.

FAQ

What is the guaranteed output voltage tolerance for NCP2860DM300R2 across temperature and load?

The NCP2860DM300R2 guarantees 3.0 V output within ±3% (2.93 V to 3.07 V) over –25°C to +85°C ambient temperature and 100 µA to 300 mA load range, as specified in the Typical Electrical Characteristics table for the 3.0 V option. This tolerance reflects factory trimming and process variation - no external adjustment is needed for fixed-mode operation.

Can NCP2860DM300R2 be used with input voltage as low as 3.0 V?

No - the recommended minimum input voltage for NCP2860DM300R2 is 3.2 V. At 300 mA load, its dropout voltage is 150 mV, so 3.0 V input would result in ~2.85 V output, falling outside regulation. For reliable 3.0 V output, Vin must be ≥3.15 V; 3.2 V is the validated lower limit per datasheet operating conditions.

How does the FAULT pin on NCP2860DM300R2 behave during normal operation?

During normal regulation, the FAULT pin on NCP2860DM300R2 remains in high-impedance (open-drain) state. When externally pulled up (e.g., to OUT via 100 kΩ), it reads logic-high. It only drives low when the input-to-output differential drops below the dynamic dropout threshold - indicating imminent loss of regulation due to low input or overload.

Is an output capacitor required for stability with NCP2860DM300R2, and what type is recommended?

Yes - a minimum 2.2 µF ceramic capacitor with ESR < 0.5 Ω is required on the OUT pin for stability across temperature and load. X5R or X7R dielectrics are recommended. Larger values (e.g., 10–22 µF) further reduce output noise and improve transient response, especially in audio applications.

Does NCP2860DM300R2 support adjustable output voltage, and how is it configured?

Yes - NCP2860DM300R2 supports adjustable output via its SET pin. With a resistor divider (R1/R2) from OUT to GND, V_OUT = 1.244 V × (1 + R1/R2). Grounding SET yields fixed 3.0 V; connecting OUT directly to SET yields 1.244 V. Leakage current (≤200 nA) must be considered for high-resistance dividers.