onsemi NCP571MN10TBG

Overview

NCP571MN10TBG from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 1.0 V at up to 150 mA with ultra-low quiescent current of 4.0 µA typical, PMOS pass transistor architecture, ±3% output accuracy at 25°C, and operation over −40°C to +85°C ambient. It serves as a primary power rail regulator in battery-powered portable instrumentation requiring stable low-voltage bias.

For engineers reviewing the NCP571MN10TBG datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage (550 mV max at 10 mA), enable threshold (1.3 V logic-high turn-on), thermal performance in DFN6 (R_JA = 190°C/W), and compatibility with 0.1 µF ceramic output capacitors.

Technical Context

The NCP571MN10TBG implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuits including current limit and thermal shutdown. Its enable input supports active-high logic control with defined turn-on/turn-off thresholds (1.3 V / 0.3 V), and it operates with input voltages from 0 V to 12 V.

Designed for stability with minimal external components, the device requires only a 0.1 µF output capacitor and accepts ceramic or tantalum types without ESR constraints. Output voltage regulation is maintained across load currents from 10 mA to 150 mA and ambient temperatures from −40°C to +85°C with ±4% tolerance over full range.

Key Specifications

Pinout & Package

Package: DFN6 (2.0 mm × 2.2 mm, 0.65 mm pitch, exposed pad). Compact footprint optimized for space-constrained portable PCBs with enhanced thermal conduction via EP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1002E/MB and TCS2101-1.0, the NCP571MN10TBG offers the optimal balance of ultra-low I_Q, integrated enable, DFN6 footprint, and industrial temperature range - making it preferred for space- and battery-life-critical portable instrumentation where pinout compatibility and minimal external components are essential.

Availability

NCP571MN10TBG is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, camcorders, smart wearables, and battery-backed data loggers requiring stable component supply with guaranteed long-term continuity.

Supply support for NCP571MN10TBG 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 innovation for automotive, industrial, cloud, and IoT applications.

The NCP571MN10TBG belongs to onsemi's NCP571 series of ultra-low-I_Q LDO regulators, designed specifically for extended-battery-life portable electronics where minimal standby power and small form factor are critical.

FAQ

What is the maximum input voltage rating for the NCP571MN10TBG?

The NCP571MN10TBG has an absolute maximum input voltage rating of 12 V. Operation above this value risks permanent damage. For reliable long-term use, design input rails to remain within 0 V to 12 V, with derating recommended under high-temperature or high-power-dissipation conditions. The NCP571MN10TBG maintains regulation down to inputs as low as 1.55 V (1.0 V + 550 mV dropout) under light load.

Does the NCP571MN10TBG require an external capacitor on its output?

Yes, the NCP571MN10TBG requires a minimum 0.1 µF ceramic output capacitor connected directly between Vout and GND, placed as close as possible to the device pins. This capacitor ensures stability, improves load transient response, and reduces output ripple. Larger values (e.g., 1.0 µF) further enhance noise rejection but are not required for basic functionality. The NCP571MN10TBG does not impose ESR constraints, unlike many older LDOs.

What is the function of the NC pins on the NCP571MN10TBG DFN6 package?

The NCP571MN10TBG has two NC (No Connection) pins - Pin 2 and Pin 5 - which are electrically isolated from internal circuitry. Although unused, onsemi recommends connecting both NC pins to the PCB's GND plane to improve mechanical mounting integrity, reduce EMI susceptibility, and aid heat dissipation through the package body. Leaving them floating is not advised per the datasheet guidance.

Can the NCP571MN10TBG be used in automotive applications?

The NCP571MN10TBG is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, use the pin-compatible NCV571MN10TBG variant, which is explicitly qualified to AEC-Q100 Grade 2 (−40°C to +105°C junction) and supports PPAP documentation. The NCP571MN10TBG itself is intended for consumer and industrial portable equipment, not under-hood or safety-critical vehicle systems.

How does the enable pin of the NCP571MN10TBG behave during power-up?

The NCP571MN10TBG enable pin is active-high with a logic threshold of 1.3 V (turn-on) and 0.3 V (turn-off). During power-up, if Vin rises before the enable signal, the device remains disabled until the enable voltage exceeds 1.3 V. To ensure predictable startup, synchronize enable assertion with or slightly after Vin stabilization. If unused, tie the enable pin directly to Vin - do not leave it floating, as that may cause erratic regulation or increased quiescent current.