onsemi NCV7805BD2TG

Overview

NCV7805BD2TG from onsemi is an automotive-grade, fixed-output +5.0 V linear voltage regulator delivering up to 1.0 A output current with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It operates with input voltages from 7.5 V to 35 V DC and maintains ±2% output voltage tolerance over temperature and load - used for stable local power supply in engine control units, body electronics, and ADAS sensor modules.

For engineers reviewing the NCV7805BD2TG datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, D2PAK-3 surface-mount package with heatsink-connected ground pin, dropout voltage of 2.0 V at 1.0 A, 68 dB ripple rejection at 120 Hz, and guaranteed operation from −40°C to +150°C junction temperature.

Technical Context

The NCV7805BD2TG implements a monolithic series pass transistor architecture with integrated bandgap reference, error amplifier, and protection circuitry. Its safe-area compensation dynamically reduces short-circuit current as V_CE increases, preventing second breakdown during fault conditions.

Thermal overload protection activates at +150°C junction temperature, forcing shutdown until cooldown; recovery is automatic. Input-to-output differential must remain ≥2.0 V under full load to maintain regulation, and quiescent current stays ≤6.0 mA across operating conditions.

Key Specifications

Pinout & Package

D2PAK-3 (TO-263-3) surface-mount package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). Heatsink mounting required for >500 mA continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC7805CD2TG and LM2940CT-5.0/NOPB, the NCV7805BD2TG uniquely combines automotive qualification, 35 V input capability, and robust safe-area protection - making it the sole option for new under-hood designs requiring AEC-Q100 Grade 1 reliability.

Availability

NCV7805BD2TG is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and ADAS camera systems requiring stable component supply across automotive production lifecycles.

Supply support for NCV7805BD2TG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The NCV7800 series is designed specifically for automotive power management - delivering robust, qualified linear regulation in harsh environments where reliability and long-term supply stability are critical.

FAQ

What is the maximum input voltage rating for NCV7805BD2TG?

The NCV7805BD2TG has an absolute maximum input voltage of 40 V DC, but its recommended operating range is 7.5 V to 35 V DC. Operation above 35 V risks exceeding safe-area limits during short-circuit events, and sustained input >35 V may trigger thermal shutdown even at light loads due to excessive power dissipation in the pass transistor.

Does NCV7805BD2TG require input and output capacitors?

Yes - a 0.33 µF ceramic or tantalum capacitor is required at the input pin (Pin 1) to ensure stability, especially with long traces or high-impedance sources. An output capacitor (0.1–1.0 µF) is not mandatory for stability but significantly improves transient response to load steps. Both capacitors must be placed as close as possible to their respective pins to minimize parasitic inductance.

How does the safe-area compensation function in NCV7805BD2TG?

The safe-area compensation in NCV7805BD2TG reduces short-circuit current as the voltage across the internal pass transistor increases - preventing second breakdown during high-V_IN/low-V_OUT faults. At 35 V input and 0 V output, short-circuit current is limited to ~0.2 A, whereas at 8 V input it remains near 1.0 A. This dynamic limitation is implemented via on-chip sensing and bias adjustment, not external components.

Is NCV7805BD2TG pin-compatible with standard 7805 regulators?

Yes - NCV7805BD2TG uses the standard three-terminal configuration (Input, Ground, Output) and shares identical pinout with TO-220, DPAK, and D2PAK variants of 7805-family regulators. The D2PAK-3 footprint matches industry-standard land patterns for TO-263-3, enabling drop-in replacement in existing layouts - provided thermal design accommodates the higher power density.

What is the thermal resistance junction-to-case for NCV7805BD2TG?

The thermal resistance junction-to-case (R_θJC) for NCV7805BD2TG is 5.0°C/W, measured from die to the exposed metal tab (Pin 2). This value assumes full solder coverage of the tab to a ≥1 in² copper pour on the PCB. Effective heatsinking using this path allows continuous 1.0 A operation at ambient temperatures up to +85°C with appropriate board-level thermal design.