onsemi NCV8506D2T50R4G

Overview

NCV8506D2T50R4G from onsemi is an automotive-grade, 500 mA low-dropout linear regulator with fixed 5.0 V output, ±2% accuracy, and integrated reverse-battery protection, thermal shutdown, and current limiting - used in body control modules, infotainment power rails, and ADAS sensor supplies.

For engineers reviewing the NCV8506D2T50R4G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive AEC-Q100 Grade 1 qualification (−40 °C to +125 °C), ultra-low quiescent current (22 µA typical), dropout voltage of 370 mV at 500 mA, and integrated enable control with active-high logic.

Technical Context

The NCV8506D2T50R4G employs a PNP pass transistor architecture enabling stable regulation under high input-to-output differential conditions up to 45 V, with internal compensation eliminating external capacitor requirements for stability. It integrates a precision bandgap reference and error amplifier optimized for low-noise operation in safety-critical domains.

Its enable pin supports controlled power sequencing in multi-rail systems, while the reverse-battery protection circuit blocks current flow when VIN is negative relative to GND - a critical feature for 12 V automotive battery environments where jump-start or battery reversal events occur.

Key Specifications

Pinout & Package

NCV8506D2T50R4G is housed in a thermally enhanced D2PAK-3 (TO-263-3) surface-mount package with exposed thermal pad for PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, the NCV8506D2T50R4G delivers superior integration (reverse-battery protection, lower IQ, no external components) and automotive-specific transient robustness - making it optimal for space- and reliability-constrained ECU designs.

Availability

NCV8506D2T50R4G is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor modules, and infotainment subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NCV8506D2T50R4G 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 leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCV8506D2T50R4G belongs to onsemi's Automotive Power Management portfolio, designed specifically for robust, low-quiescent-current regulation in harsh-temperature vehicle environments where reliability and integration are critical.

FAQ

What is the maximum input voltage rating for the NCV8506D2T50R4G?

The NCV8506D2T50R4G supports an absolute maximum input voltage of 45 V, compliant with ISO 7637-2 load-dump test requirements. This rating allows direct connection to automotive battery rails without external clamping, provided transient suppression is handled per system-level design. The device operates continuously from 3.5 V to 40 V, with full specification guaranteed across that range. NCV8506D2T50R4G maintains regulation down to 3.5 V during cold-crank events.

Does the NCV8506D2T50R4G require an external capacitor on the output pin?

Yes, the NCV8506D2T50R4G requires a minimum 10 µF ceramic output capacitor for stability and transient response. onsemi specifies X7R or X5R dielectrics with ≤100 mΩ ESR; values between 10 µF and 100 µF are acceptable. No input capacitor is mandatory, but a 1 µF ceramic is recommended near the IN pin. The NCV8506D2T50R4G does not require external compensation components due to internal design.

Is the NCV8506D2T50R4G pin-compatible with other regulators in the NCV8506 family?

Yes, all variants in the NCV8506 family - including NCV8506D2T33R4G (3.3 V), NCV8506D2T50R4G (5.0 V), and NCV8506D2T33R4G (3.3 V) - share identical D2PAK-3 pinout and thermal pad layout. Output voltage is set internally, so PCB design can be reused across voltage options without layout changes. The NCV8506D2T50R4G maintains full functional compatibility with its siblings in this family.

What is the thermal performance of the NCV8506D2T50R4G in a standard 4-layer PCB layout?

In a standard 4-layer PCB with 2-in² copper pour connected to the exposed thermal pad, the NCV8506D2T50R4G achieves a junction-to-ambient thermal resistance (θ_JA) of approximately 40 °C/W. At 500 mA and 12 V input, power dissipation is ~3.5 W, resulting in ~140 °C junction rise above ambient - well within the 165 °C thermal shutdown threshold. The NCV8506D2T50R4G includes thermal foldback to sustain safe operation under sustained overload.

How does the enable (EN) pin function on the NCV8506D2T50R4G?

The EN pin on the NCV8506D2T50R4G is an active-high logic input with internal 1.2 MΩ pull-down resistor. Driving EN ≥2.0 V enables regulation; pulling EN <0.4 V disables the output and reduces quiescent current to <1 µA. No external pull-up is required. The EN pin supports clean power sequencing in multi-rail systems and enables wake-on-event functionality in low-power ECUs. NCV8506D2T50R4G retains full specification compliance across the EN logic threshold range.