onsemi NCV612SQ15T1G

Overview

NCV612SQ15T1G from onsemi is an automotive-grade CMOS low-dropout linear voltage regulator delivering 100 mA output at fixed 1.5 V with ultra-low 40 µA quiescent current, 230 mV dropout at 100 mA, and ±2.0% output voltage accuracy - designed for battery-powered infotainment modules and body control units requiring stable low-power biasing.

For engineers reviewing the NCV612SQ15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 qualification, −40 °C to +125 °C operating range, SC70-5 package thermal performance, and enable-controlled standby functionality.

Technical Context

The NCV612SQ15T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection circuits - enabling stable regulation without external compensation. Its architecture supports ceramic output capacitors as low as 1.0 µF with no ESR requirement.

It features active enable logic with 0.3 V (logic low) and 0.95 V (logic high) thresholds, allowing direct microcontroller GPIO control. Dropout voltage remains ≤230 mV across −40 °C to +125 °C at full 100 mA load, ensuring reliable operation under cold-cranking and thermal stress conditions.

Key Specifications

Pinout & Package

Housed in the SC70-5 (SOT-353) surface-mount package - 2.0 mm × 1.25 mm footprint with 0.65 mm pitch - optimized for high-density automotive PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV612SQ15T1G, NCV8170ASN150T1G offers higher current headroom but increased IQ, while TLV73315PDBVR provides lower dropout in a different package without automotive compliance - making NCV612SQ15T1G the optimal balance of size, qualification, and ultra-low IQ for entry-level automotive LDO needs.

Availability

NCV612SQ15T1G is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and telematics devices requiring stable component supply with AEC-Q100 assurance and long-term lifecycle continuity.

Supply support for NCV612SQ15T1G 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 NCV612SQ15T1G belongs to onsemi's automotive-qualified linear regulator product line - engineered specifically for low-power, high-reliability biasing in harsh-temperature vehicle subsystems.

FAQ

What is the maximum input voltage rating for the NCV612SQ15T1G?

The NCV612SQ15T1G has a maximum input voltage rating of 6.0 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. This rating allows compatibility with standard 5 V supply rails and accommodates transient spikes common in automotive 12 V systems, provided external clamping or filtering is used for sustained overvoltage events beyond 6.0 V. The NCV612SQ15T1G maintains regulation down to Vin = Vout + dropout (1.73 V minimum).

Does the NCV612SQ15T1G require an external capacitor on the output pin?

Yes, the NCV612SQ15T1G requires a minimum 1.0 µF ceramic output capacitor (Cout) connected directly between Vout and Gnd. This capacitor stabilizes regulation, improves load transient response, and reduces output noise. The device is explicitly characterized and guaranteed stable with ceramic capacitors having ESR from a few mΩ up to 5.0 Ω - eliminating the need for specialized tantalum or aluminum electrolytic types. Placement within 2 mm of the Vout and Gnd pins is recommended for optimal performance.

Is the NCV612SQ15T1G pin-compatible with other variants in the NCV612 family?

Yes, all NCV612 variants - including NCV612SQ15T1G, NCV612SQ30T1G, and NCV612SQ33T1G - share identical SC70-5 pinout and package dimensions. Pin 1 is Vin, Pin 2 is Gnd, Pin 3 is Enable, Pin 4 is N/C, and Pin 5 is Vout across the entire series. This allows drop-in replacement of different output voltage versions on the same PCB layout, simplifying design reuse and inventory management for multi-voltage automotive platforms.

What is the thermal shutdown threshold of the NCV612SQ15T1G?

The NCV612SQ15T1G incorporates internal thermal protection that activates at approximately 160 °C junction temperature, shutting down the output to prevent damage. Recovery occurs automatically once the junction cools below the hysteresis threshold (~140 °C). This feature safeguards against sustained overload, poor PCB thermal design, or high ambient temperatures in enclosed automotive environments. The device's R_θJA of 300 °C/W means 330 mW max power dissipation at 25 °C ambient - underscoring the need for adequate copper pour on the Gnd pad.

Can the NCV612SQ15T1G be used without connecting the Enable pin?

Yes, the NCV612SQ15T1G can be operated with the Enable pin unconnected only if tied directly to Vin - as explicitly stated in the datasheet. Leaving Enable floating is not permitted and may cause erratic startup or undefined behavior. When connected to Vin, the regulator operates continuously; when pulled below 0.3 V, it enters ultra-low-power shutdown (<1 µA). For systems requiring controlled power sequencing, Enable should be driven by a microcontroller GPIO or dedicated power manager.