onsemi NCV33269DTRK33G

Overview

NCV33269DTRK33G from onsemi is an automotive-grade, fixed-output 3.3 V low-dropout linear voltage regulator in DPAK (TO-252) package, delivering up to 800 mA output current with 1.0 V dropout at 500 mA and ±1% output voltage tolerance over temperature and load. It integrates thermal shutdown and short-circuit protection, and is AEC-Q100 qualified for use in engine control units, body electronics, and infotainment power rails.

For engineers reviewing the NCV33269DTRK33G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance under 800 mA load, thermal resistance (6.0°C/W junction-to-case), automotive qualification status, and compatibility with 10 µF minimum output capacitance.

Technical Context

The NCV33269DTRK33G employs a composite PNP–NPN pass transistor architecture enabling stable regulation at low input–output differentials. Its internal reference is trimmed to 1.25 V with ±1% accuracy, and line/load regulation is specified at ≤0.3% and ≤0.5%, respectively.

Thermal protection activates at ~170°C junction temperature without hysteresis, and current limiting holds output at ~800 mA under short-circuit conditions. The device operates across −40°C to +125°C ambient and supports input voltages up to 20 V.

Key Specifications

Pinout & Package

DPAK-3 (Case 369C) package with exposed heatsink tab electrically connected to Pin 2 (V_OUT). Mounting surface serves as primary thermal path; PCB copper pad under tab is critical for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73333PDBVR and TPS7B8733QKVURQ1, the NCV33269DTRK33G offers the optimal balance of automotive qualification, proven thermal robustness in DPAK, and cost-effective 800 mA delivery - making it ideal for legacy and cost-sensitive automotive modules where AEC-Q100 compliance is mandatory but advanced features are unnecessary.

Availability

NCV33269DTRK33G is available at Aetrix Electronics and suitable for engine control units, body control modules, and infotainment systems requiring stable component supply with full automotive traceability and long-term lifecycle support.

Supply support for NCV33269DTRK33G 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 NCV33269 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for reliable, low-noise power delivery in harsh-temperature vehicle subsystems including powertrain, chassis, and comfort electronics.

FAQ

What is the maximum input voltage rating for the NCV33269DTRK33G?

The NCV33269DTRK33G has a maximum power supply input voltage (V_IN) rating of 20 V, as specified in the Absolute Maximum Ratings table. This allows safe operation across the full automotive battery range, including load dump transients up to 18 V, provided external clamping or filtering is implemented per system-level requirements. The device remains functional and protected within this limit when used with appropriate input capacitance and thermal management.

Does the NCV33269DTRK33G require an external output capacitor, and what are the specifications?

Yes, the NCV33269DTRK33G requires an external output capacitor for stability. The datasheet specifies a minimum of 10 µF with ESR between 0.2 Ω and 10 Ω over the operating temperature range. Solid tantalum or low-ESR polymer capacitors are recommended; standard electrolytics may cause instability at low temperatures due to rising ESR. Ceramic capacitors are discouraged unless carefully validated, as their near-zero ESR can induce oscillation in the NCV33269DTRK33G control loop.

Is the NCV33269DTRK33G pin-compatible with the MC33269DTRK33G?

Yes, the NCV33269DTRK33G is pin-compatible with the MC33269DTRK33G - both use identical DPAK-3 (Case 369C) packaging and share the same pinout (Pin 1: GND/Adj, Pin 2: V_OUT, Pin 3: V_IN). The key distinction is automotive qualification: NCV33269DTRK33G is AEC-Q100 Grade 1 qualified and manufactured under PPAP-controlled processes, whereas the MC33269DTRK33G is for commercial/industrial use. No PCB changes are needed for drop-in replacement in automotive designs.

What is the thermal shutdown behavior of the NCV33269DTRK33G?

The NCV33269DTRK33G features non-hysteretic thermal shutdown that disables the output when junction temperature reaches approximately 170°C. There is no built-in hysteresis, so if thermal dissipation is insufficient, the device cycles on/off - appearing as output oscillation. This behavior is intentional to prevent permanent damage but is not a substitute for proper heatsinking. The 6.0°C/W junction-to-case thermal resistance means a 1 cm² 2-oz copper pad under the tab is typically sufficient for 800 mA operation at +85°C ambient.

Can the NCV33269DTRK33G be used in adjustable-output configurations?

No, the NCV33269DTRK33G is a fixed 3.3 V output variant and does not support adjustable operation. Its internal feedback network is trimmed and laser-programmed for 3.3 V; the Adjust pin (Pin 1) is internally connected to ground and must be bypassed or left unconnected. For adjustable versions, engineers should select the NCV33269DTRKADJ or equivalent part number explicitly designated as "Adj" in the suffix - these provide access to the 1.25 V reference and external resistor divider interface.