onsemi NCP171AMX100080TCG

Overview

NCP171AMX100080TCG from onsemi is an ultra-low-quiescent-current dual-mode LDO regulator delivering 80 mA in Active Mode and consuming only 50 nA in Low Power Mode. It features externally controlled ECO pin mode selection, factory-programmed 100 mV output voltage offset in Low Power Mode (vs. nominal 0.80 V), and operates across 1.7–5.5 V input range - ideal for battery-powered IoT sensor nodes requiring multi-year operation.

For engineers reviewing the NCP171AMX100080TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its 50 nA low-power I_Q, 100 mV programmable voltage scaling, active discharge capability, ±2% output accuracy in Active Mode, and XDFN4 1.2×1.2 mm package compatibility with space-constrained wearable designs.

Technical Context

The NCP171AMX100080TCG implements a dual-path internal architecture: one optimized for ultra-low I_Q (50 nA) and 5 mA load capability in Low Power Mode, and another for high-performance regulation (80 mA, 65 dB PSRR at 1 kHz, 41 mV dropout at 3.3 V/80 mA) in Active Mode. Mode switching is controlled by the ECO pin's voltage threshold (VECO_L = 0.2 V, VECO_H = 0.5 V), enabling dynamic power-state transitions without external circuitry.

Startup defaults to Active Mode for 35 ms to ensure stable capacitor charging and system wake-up, after which ECO pin state determines operational mode. The device integrates active output discharge (R_DS(on) ≈ 50 Ω), thermal shutdown (T_SD = 165 °C), current limiting (140–170 mA in Active Mode), and ENA-controlled enable/disable with 1.2 V turn-on and 0.4 V shutdown thresholds.

Key Specifications

Pinout & Package

Package: XDFN4 1.2 mm × 1.2 mm, 4-pin with exposed thermal pad (Case 711BC, AM suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-0802E/MB and XC6210B082MR-G, the NCP171AMX100080TCG uniquely delivers true dual-mode operation with factory-set 100 mV voltage scaling - enabling hardware-driven, zero-latency transitions between high-performance and ultra-low-power states without firmware overhead or external components.

Availability

NCP171AMX100080TCG is available at Aetrix Electronics and suitable for IoT sensor nodes, RFID readers, and wearable health monitors requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NCP171AMX100080TCG 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP171AMX100080TCG belongs to onsemi's SLIQ (Super Low I_Q) LDO family - engineered specifically for battery-critical applications where nanoscale quiescent current and hardware-controlled power-state agility are mandatory.

FAQ

What is the factory-programmed output voltage offset for NCP171AMX100080TCG?

The NCP171AMX100080TCG is factory-programmed with a 100 mV output voltage offset in Low Power Mode, reducing its regulated output from the nominal 0.80 V (Active Mode) to 0.70 V. This offset is fixed and non-adjustable, enabling predictable sleep-mode power savings without firmware intervention. The offset value is encoded in the part number suffix "100" - confirming 100 mV scaling per onsemi's ordering nomenclature.

How does the ECO pin control mode switching on NCP171AMX100080TCG?

The ECO pin on NCP171AMX100080TCG controls mode selection via voltage threshold: pulling ECO to GND (≤0.2 V) forces Low Power Mode (50 nA I_Q, 5 mA max load), while driving ECO to V_OUT (≥0.5 V) selects Active Mode (80 mA max load, 65 dB PSRR). The transition is immediate and hardware-based - no delay or configuration register access required. Startup defaults to Active Mode for 35 ms regardless of ECO state.

Does NCP171AMX100080TCG support active output discharge, and how is it implemented?

Yes, NCP171AMX100080TCG includes integrated active output discharge. When the ENA pin is driven below 0.4 V (disable state), an internal NMOS transistor connects the OUT pin to GND with R_DS(on) ≈ 50 Ω, rapidly discharging external capacitors. This prevents floating outputs during power sequencing and eliminates need for external discharge resistors - critical for deterministic system reset behavior in battery-powered devices.

What is the maximum input voltage rating for NCP171AMX100080TCG, and what protection features apply?

The absolute maximum input voltage for NCP171AMX100080TCG is 6.0 V. Beyond standard overcurrent and thermal shutdown (165 °C with 20 °C hysteresis), it includes ESD protection rated at 2000 V HBM and 200 V MM. Input voltage exceeding 6.0 V risks permanent damage; operation above 5.5 V violates recommended conditions. The device also features current limiting (140–170 mA in Active Mode) to protect against shorted outputs.

Can NCP171AMX100080TCG operate with input voltages below 1.7 V?

No - NCP171AMX100080TCG has a specified minimum operating input voltage of 1.7 V. Below this, regulation is not guaranteed: dropout margin collapses, output accuracy degrades, and Low Power Mode functionality may become unstable. For sub-1.7 V operation (e.g., single alkaline cell at end-of-life), alternative regulators with lower VIN(min) - such as the NCP170 series - must be evaluated. The 1.7 V lower limit is validated across −40°C to +85°C.