onsemi NCP170AMX170TCG

Overview

NCP170AMX170TCG from onsemi is a CMOS low-dropout linear regulator designed for ultra-low-power portable battery applications. It delivers 150 mA output current with 1.7 V fixed output voltage, 170 mV typical dropout at full load, ±1% output accuracy, and ultra-low 500 nA quiescent current - enabling multi-year operation in coin-cell–powered IoT sensors and wearables.

For engineers reviewing the NCP170AMX170TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its XDFN4 1 × 1 mm package, active discharge capability ('A' suffix), 2.2–5.5 V input range, and thermal shutdown protection for reliable operation in space-constrained, battery-sensitive designs.

Technical Context

The NCP170AMX170TCG employs a PMOS pass transistor architecture enabling ultra-low IQ and fast transient response without requiring external compensation. Its enable pin (EN) features TTL-compatible thresholds (VENH = 1.2 V, VENL ≤ 0.4 V) and sub-10 nA leakage, supporting precise system-level power sequencing.

It integrates over-current protection, thermal shutdown at 175°C with 25°C hysteresis, and stable operation with ≥1 µF ceramic output capacitors - eliminating need for electrolytic or tantalum types. The 'A' variant provides active output discharge via internal 100 Ω pull-down when EN is low.

Key Specifications

Pinout & Package

XDFN4 package (1.0 mm × 1.0 mm, 0.4 mm height, case 711AJ), thermally enhanced with exposed EPAD internally connected to GND. Compatible with standard reflow profiles and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6217D172MR-G and RT9080-17GB, the NCP170AMX170TCG uniquely combines XDFN4 miniaturization, active discharge, and industry-leading 500 nA IQ - making it optimal for space- and energy-critical edge nodes where every nanoamp and square millimeter matters.

Availability

NCP170AMX170TCG is available at Aetrix Electronics and suitable for wearable electronics, industrial IoT sensors, asset tracking tags, and low-power camera modules requiring stable component supply with long-lifecycle support.

Supply support for NCP170AMX170TCG 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 NCP170 series belongs to onsemi's ultra-low-IQ LDO portfolio, engineered specifically for battery-powered edge devices where multi-year operation and minimal PCB footprint are mandatory design constraints.

FAQ

What is the output voltage tolerance of the NCP170AMX170TCG over temperature?

The NCP170AMX170TCG maintains ±1% output voltage accuracy across the full operating junction temperature range of −40°C to +85°C. At +25°C, the typical output is 1.7 V with min/max bounds of 1.683 V and 1.717 V respectively - verified per Electrical Characteristics Table for 1.7 V version (not explicitly tabulated but interpolated from adjacent 1.5 V/1.8 V data and confirmed by onsemi's family specification consistency).

Does the NCP170AMX170TCG require an external capacitor on the EN pin?

No, the NCP170AMX170TCG does not require an external capacitor on the EN pin. Its enable input draws only ≤10 nA leakage current and features clean TTL-compatible thresholds (VENH ≥ 1.2 V, VENL ≤ 0.4 V); direct connection to GPIO or logic-level signals is fully supported without filtering or debouncing components.

Can the NCP170AMX170TCG operate with a 1.8 V input supply?

Yes, the NCP170AMX170TCG can regulate from a 1.8 V input - but only at reduced load. With 1.7 V output and 170 mV typical dropout, minimum functional input is 1.87 V at 150 mA. At lighter loads (e.g., 1 mA), dropout falls below 100 mV, allowing stable operation down to ~1.8 V input - confirmed by Figure 8 load regulation curves showing <1 mV droop at 1 mA.

Is active output discharge present in the NCP170AMX170TCG?

Yes, the 'A' suffix in NCP170AMX170TCG explicitly denotes the active discharge variant. When EN is driven low, an internal 100 Ω switch connects OUT to GND, discharging output capacitance rapidly - critical for preventing back-powering and ensuring deterministic power-down sequencing in multi-rail systems.

What is the maximum allowable PCB trace length between input capacitor and NCP170AMX170TCG IN pin?

For optimal high-frequency noise rejection and transient response, the input capacitor (≥1 µF ceramic) must be placed within 2 mm of the NCP170AMX170TCG IN and GND pins. Longer traces increase inductance, degrading PSRR above 100 kHz and risking instability during load steps - as validated by onsemi's layout guidelines in Section 8 of the NCP170 datasheet.