onsemi NCV511SN15T1G

Overview

NCV511SN15T1G from onsemi is an automotive-grade, fixed-output 1.5 V low-dropout linear regulator with 150 mA output capability, ultra-low 40 µA quiescent current, and 100 mV dropout at 100 mA - designed for battery-powered instrumentation requiring stable voltage under light-load and thermal-constrained conditions.

For engineers reviewing the NCV511SN15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 qualification, ±2.0% output accuracy over −40°C to +85°C, TSOP-5 package thermal performance, and enable-controlled standby mode with 0.3 V logic-low disable threshold.

Technical Context

The NCV511SN15T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown) in a single monolithic IC. It operates with input voltages from 1.8 V to 6.0 V and maintains regulation down to a 100 mV Vin–Vout differential at 100 mA load.

Its enable input supports system-level power sequencing: pulled low to disable (ground pin current drops to ≤0.1 µA), tied to Vin for always-on operation. The device achieves 50 dB ripple rejection at 1 kHz and delivers 110 µV_RMS output noise (20 Hz–100 kHz) with 1.0 µF ceramic output capacitance.

Key Specifications

Pinout & Package

The NCV511SN15T1G is housed in a Pb-free TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for compact portable and automotive modules with limited board area and thermal mass.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Compared with TLV70015QDSERQ1 and AP7361-15SG-13, the NCV511SN15T1G uniquely balances AEC-Q100 Grade 1 compliance, ultra-low 40 µA quiescent current, and 100 mV dropout at 100 mA - making it optimal for space-constrained, battery-dependent automotive and medical edge devices where both reliability and energy efficiency are mandatory.

Availability

NCV511SN15T1G is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for NCV511SN15T1G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV511 series belongs to onsemi's automotive-qualified linear regulator product line, engineered specifically for low-power, high-reliability applications in harsh environments - including engine control units, ADAS subsystems, and battery management interfaces.

FAQ

What is the maximum input voltage rating for the NCV511SN15T1G?

The NCV511SN15T1G has a maximum input voltage rating of 6.0 V, as specified in its Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. This rating allows compatibility with common 5 V supply rails and fully charged single-cell Li-ion batteries (up to 4.2 V), while providing margin for transient spikes within system design limits. The NCV511SN15T1G must not be used with inputs exceeding 6.0 V even momentarily unless protected by external clamping circuitry.

Does the NCV511SN15T1G require an external capacitor on its output pin?

Yes, the NCV511SN15T1G requires a minimum 1.0 µF ceramic output capacitor (X5R or X7R dielectric) connected directly between Vout and GND. This capacitor ensures stability, improves load transient response, and reduces output noise. Larger values (e.g., 2.2 µF or 10 µF) further enhance noise suppression and transient recovery, especially under dynamic loads. The device is explicitly characterized and guaranteed stable with ceramic capacitors having ESR from a few mΩ up to 3.0 Ω - no minimum ESR requirement exists.

Is the NCV511SN15T1G pin-compatible with other variants in the NCV511 family?

Yes, all NCV511 variants - including NCV511SN15T1G, NCV511SN25T1G, and NCV511SN33T1G - share identical TSOP-5 pinout and package dimensions (Case 483). 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 direct substitution between output voltage versions without PCB layout changes, provided the input voltage and load requirements remain within specification for each variant.

What does the "NCV" prefix signify for the NCV511SN15T1G?

The "NCV" prefix indicates that the NCV511SN15T1G is an automotive-grade version meeting AEC-Q100 stress test requirements and supporting PPAP documentation. It features enhanced process controls, unique site and change management protocols, and extended temperature qualification (−40°C to +125°C junction). Unlike standard NCP511 parts, the NCV511SN15T1G is manufactured and tested to automotive quality standards - making it suitable for safety-critical and mission-reliability applications in vehicles.

Can the NCV511SN15T1G be disabled to reduce system power consumption?

Yes, the NCV511SN15T1G features an active-high Enable pin (Pin 3) that places the device into ultra-low-power standby when pulled low (≤0.3 V). In this state, ground current drops to ≤0.1 µA - effectively eliminating quiescent draw. To enable normal operation, the Enable pin must be driven to ≥1.3 V (typically connected to Vin or a system GPIO). If unused, Enable must be tied to Vin; floating the pin is not permitted and may cause erratic behavior.