onsemi NCP170BMX320TCG

Overview

NCP170BMX320TCG from onsemi is a CMOS low-dropout (LDO) regulator designed for ultra-low-power portable battery applications, delivering 150 mA output with 3.2 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 NCP170BMX320TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its XDFN4 1 × 1 mm package, enable-pin control logic, ceramic-capacitor stability, thermal shutdown behavior, and performance under dynamic load transients in space-constrained wireless edge nodes.

Technical Context

The NCP170BMX320TCG implements a PMOS pass transistor architecture optimized for minimal quiescent current and fast transient response. Its internal bandgap reference and error amplifier maintain regulation across −40°C to +85°C while supporting input voltages from 2.2 V to 5.5 V.

It features active-high enable (EN) with 1.2 V threshold, over-current protection that limits short-circuit current to 195 mA, and thermal shutdown triggered at 175°C with 25°C hysteresis - ensuring robust operation in thermally dense PCB layouts without external supervision circuitry.

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. Pin pitch: 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B322MR-G and RT9013-32PQV, the NCP170BMX320TCG uniquely balances ultra-low 500 nA IQ, 1 × 1 mm XDFN4 footprint, integrated EN control, and ±1% accuracy - making it optimal for miniaturized, long-life battery systems where every nanoamp and square millimeter matters.

Availability

NCP170BMX320TCG is available at Aetrix Electronics and suitable for wearable health monitors, BLE beacon nodes, and industrial wireless sensors requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for NCP170BMX320TCG 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 - focused on enabling sustainable technology through high-performance, reliable components.

The NCP170 series belongs to onsemi's ultra-low-power linear regulator product line, engineered specifically for battery-operated edge devices demanding nanowatt-level standby consumption and sub-millimeter packaging without sacrificing regulation accuracy or transient performance.

FAQ

What is the output voltage tolerance of the NCP170BMX320TCG over temperature?

The NCP170BMX320TCG maintains a fixed 3.2 V output with ±1% accuracy across the full operating junction temperature range of −40°C to +85°C. At +25°C, the typical output is 3.2 V with min/max bounds of 3.168 V and 3.232 V; over temperature, the worst-case deviation remains within ±1% of nominal, as confirmed in the Electrical Characteristics table for the 3.2 V version.

Does the NCP170BMX320TCG require an external pull-up resistor on the EN pin?

No, the NCP170BMX320TCG does not require an external pull-up resistor on the EN pin. Its EN input draws only 10 nA maximum leakage current and has a defined high-threshold of 1.2 V and low-threshold of 0.4 V. It can be driven directly from a GPIO or open-drain controller output; a pull-up is optional only if system-level default-on behavior is needed during reset.

Can the NCP170BMX320TCG operate with a 2.5 V input voltage?

No, the NCP170BMX320TCG cannot regulate at 2.5 V input because its minimum operating input voltage is 2.2 V, but its 3.2 V output requires ≥3.37 V input (3.2 V + 170 mV dropout) to sustain 150 mA load. At 2.5 V input, it enters dropout and cannot maintain regulation - use only with VIN ≥3.37 V for full-load operation or ≥3.2 V for light loads (<10 mA).

Is the NCP170BMX320TCG compatible with 1 µF ceramic output capacitors?

Yes, the NCP170BMX320TCG is explicitly characterized and guaranteed stable with a 1 µF X5R or X7R ceramic capacitor on the output. Unlike many older LDOs, it imposes no minimum ESR requirement - eliminating the need for bulkier, higher-ESR tantalum or aluminum electrolytic capacitors and simplifying layout in space-constrained designs.

What thermal protection features does the NCP170BMX320TCG include?

The NCP170BMX320TCG integrates thermal shutdown protection that activates at +175°C junction temperature, with 25°C hysteresis to prevent oscillation near the trip point. Once triggered, the device shuts down the pass element and disables output until junction temperature falls below +150°C. This fully autonomous protection requires no external components and is validated per JEDEC JESD78 latch-up and thermal stress standards.