onsemi NCP170AXV360T2G

Overview

NCP170AXV360T2G from onsemi is a CMOS low-dropout linear regulator designed for ultra-low-power portable battery applications. It delivers 150 mA output current with 3.6 V fixed output, 170 mV typical dropout at full load, ±1% output voltage accuracy over −40°C to +85°C, and ultra-low 500 nA typical quiescent current-enabling multi-year operation in coin-cell-powered IoT sensors.

For engineers reviewing the NCP170AXV360T2G datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (SOT-563), confirmed EN/IN/OUT/GND pin functions, thermal shutdown behavior (175°C trip), active discharge capability (R_LOW = 100 Ω), and real-world PSRR/noise performance at 3.6 V output.

Technical Context

The NCP170AXV360T2G integrates a PMOS pass transistor with precision bandgap reference and error amplifier, enabling stable regulation across 2.2 V–5.5 V input while maintaining sub-1 µA quiescent draw in active mode. Its enable pin (EN) features TTL-compatible thresholds (V_ENH = 1.2 V, V_ENL = 0.4 V) and <10 nA leakage, supporting low-power microcontroller wake-up control.

It includes over-current protection (225 mA short-circuit limit), thermal shutdown with 25°C hysteresis, and is optimized for ceramic output capacitors ≥1 µF. The "A" suffix denotes active output discharge functionality, critical for fast power-down sequencing in battery-backed systems.

Key Specifications

Pinout & Package

Package: SOT-563 (Case 463A), 1.6 mm × 1.6 mm × 0.55 mm, 6-pin, RoHS-compliant, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3602E/TO and XC6210B362MR-G, the NCP170AXV360T2G uniquely combines 500 nA IQ, EN control, active discharge, and SOT-563 thermal performance-making it optimal for battery longevity, power sequencing, and compact industrial IoT endpoints.

Availability

NCP170AXV360T2G is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor nodes, and industrial predictive maintenance sensors requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for NCP170AXV360T2G 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 is part of onsemi's ultra-low-power analog portfolio, engineered specifically for battery-operated edge devices where nanoscale quiescent current and precise voltage regulation directly impact product lifetime and reliability.

FAQ

What is the maximum input voltage rating for the NCP170AXV360T2G?

The NCP170AXV360T2G has an absolute maximum input voltage rating of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input voltage range is 2.2 V to 5.5 V, which aligns with common battery chemistries including single Li-ion (4.2 V max), two Alkaline (3.2 V fresh), and three NiMH (4.5 V fresh). The NCP170AXV360T2G maintains regulation and specified performance across this full range.

Does the NCP170AXV360T2G require an external capacitor on the EN pin?

No, the NCP170AXV360T2G does not require an external capacitor on the EN pin. Its enable input is CMOS-compatible with low leakage (<10 nA) and TTL-level thresholds (V_ENH = 1.2 V, V_ENL = 0.4 V), allowing direct drive from microcontroller GPIOs. Adding capacitance to EN may slow turn-on/turn-off timing and is unnecessary for noise immunity-the internal design ensures robust enable functionality without external components. The NCP170AXV360T2G datasheet specifies no external EN capacitor in any recommended application circuit.

How does the active output discharge function work in the NCP170AXV360T2G?

When the EN pin is driven low, the NCP170AXV360T2G activates an internal 100 Ω discharge path between the OUT and GND pins, rapidly pulling the output voltage to near-zero (typically <100 mV within 1–2 ms). This prevents floating outputs that could cause downstream logic glitches or unintended power-up of connected ICs. The feature is exclusive to "A"-suffix variants like the NCP170AXV360T2G and is disabled when EN is high. It operates independently of load current and requires no external components.

Can the NCP170AXV360T2G be used with a 1 µF ceramic output capacitor?

Yes, the NCP170AXV360T2G is explicitly characterized and guaranteed stable with a 1 µF ceramic output capacitor (X5R or X7R dielectric, ≤100 mΩ ESR), as stated in the datasheet Features section and Electrical Characteristics tables. This eliminates the need for larger or more expensive capacitor types. Layout best practice requires placing the capacitor within 2 mm of the OUT and GND pins, with short, wide traces to minimize inductance-ensuring the NCP170AXV360T2G maintains stability under all load and temperature conditions.

What is the thermal resistance (R_JA) of the NCP170AXV360T2G in its SOT-563 package?

The NCP170AXV360T2G in the SOT-563 package has a junction-to-air thermal resistance (R_JA) of 200°C/W, as specified in the Thermal Characteristics table of the datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad). With 150 mA output current and 170 mV dropout, power dissipation is ~25.5 mW, resulting in a worst-case junction temperature rise of ~5.1°C above ambient-well within safe operating limits. No heatsink or thermal vias are required for typical use cases.