onsemi NCP171AMX330310TCG

Overview

NCP171AMX330310TCG from onsemi is an ultra-low-quiescent-current dual-mode LDO regulator delivering 3.3 V output in Active Mode and 3.1 V (−200 mV offset) in Low Power Mode, with 50 nA I_Q at no load and 80 mA max output current. It features externally controlled ECO pin mode switching, active output discharge, and ±2% output voltage accuracy - ideal for battery-powered IoT sensors and RFID tags requiring multi-year operation.

For engineers reviewing the NCP171AMX330310TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its factory-programmed 200 mV low-power voltage offset, 41 mV dropout at 80 mA (3.3 V), 65 dB PSRR at 1 kHz, XDFN4 1.2×1.2 mm package, and dual-mode control via ECO/ENA pins.

Technical Context

The NCP171AMX330310TCG implements a dual-path regulation architecture: one optimized for high-efficiency low-power operation (5 mA max, 50 nA I_Q) and another for high-performance active operation (80 mA, 65 dB PSRR, 41 mV dropout). The ECO pin selects between modes by threshold detection (VECOH = 0.5 V, VECOL = 0.2 V), while ENA enables/disables the entire regulator (VENAH = 1.2 V, VENAL = 0.4 V).

Its internal voltage scaling applies a fixed −200 mV offset to the nominal 3.3 V output in Low Power Mode, confirmed by datasheet Figure 33 and Table 4. Thermal shutdown activates at 165 °C with 20 °C hysteresis, and the device supports fast startup with enforced 35 ms Active Mode on power-up regardless of ECO state.

Key Specifications

Pinout & Package

Package: XDFN4 1.2 mm × 1.2 mm, 4-pin with exposed thermal pad (Case 711BC, AM suffix). Compact footprint suits space-constrained wearables and asset trackers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TLS850F2TE/V33, the NCP171AMX330310TCG uniquely delivers programmable voltage scaling and 50 nA quiescent current in a 1.2×1.2 mm package - making it optimal for long-life, space-constrained battery IoT endpoints where dynamic power-state adaptation is essential.

Availability

NCP171AMX330310TCG is available at Aetrix Electronics and suitable for wireless sensor nodes, RFID readers, wearable health monitors, and smart asset trackers requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NCP171AMX330310TCG 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 NCP171AMX330310TCG belongs to onsemi's SLIQ (Super Low Iq) LDO family, engineered specifically for battery-powered edge devices demanding nanoscale quiescent current and intelligent power-state transitions without sacrificing regulation performance.

FAQ

What output voltage does the NCP171AMX330310TCG deliver in Active Mode and Low Power Mode?

The NCP171AMX330310TCG delivers a nominal 3.3 V output in Active Mode and a factory-programmed 3.1 V output (−200 mV offset) in Low Power Mode. This dual-voltage capability is confirmed in datasheet Figures 33 and 35, and Table 4 specifies the offset as 200 mV for this part number. The voltage transition is controlled solely by the ECO pin state, with no external programming required.

How does the ECO pin control mode switching on the NCP171AMX330310TCG?

The ECO pin on the NCP171AMX330310TCG acts as a mode-select input: pulling it to GND (≤0.2 V) forces Low Power Mode (50 nA I_Q, 5 mA max output), while driving it to V_OUT (≥0.5 V) enables Active Mode (80 mA, 65 dB PSRR). Datasheet Table 1 and Figure 2 confirm this threshold-based control, and the device defaults to Active Mode for 35 ms at startup regardless of ECO state to ensure stable output capacitor charging.

What is the maximum dropout voltage of the NCP171AMX330310TCG at full load?

The NCP171AMX330310TCG has a typical dropout voltage of 41 mV at 80 mA output current and 3.3 V output in Active Mode, as specified in Table 4 of the datasheet. The maximum dropout under those conditions is 55 mV. This low dropout enables operation from input voltages as low as 3.341 V while maintaining regulation - critical for extending runtime in declining-battery applications.

Does the NCP171AMX330310TCG include output discharge functionality?

Yes, the NCP171AMX330310TCG includes active output discharge: when the ENA pin is driven below 0.4 V, an internal NMOS transistor (R_DS(on) ≈ 50 Ω) pulls the OUT pin to GND. This feature is documented in the Features list and Figure 2 block diagram, ensuring rapid and controlled discharge of output capacitance during shutdown - preventing unintended wake-ups or bus contention in multi-rail systems.

What package type and thermal characteristics apply to the NCP171AMX330310TCG?

The NCP171AMX330310TCG uses the XDFN4 1.2 mm × 1.2 mm package (Case 711BC, AM suffix) with an exposed thermal pad. Its junction-to-ambient thermal resistance (R_JA) is 170 °C/W when mounted on a 40 mm × 40 mm FR4 PCB with 2-ounce copper on both sides, per Table 3. Proper soldering of the exposed pad to a large ground plane is required to achieve this rating and prevent thermal shutdown under sustained 80 mA loads.