onsemi NCV7808BD2TR4

Overview

NCV7808BD2TR4 from onsemi is an automotive-grade, fixed-output +8.0 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 10.6 V to 25 V and maintains ±3% output voltage tolerance over temperature and load - used in engine control units, body electronics, and infotainment power rails.

For engineers reviewing the NCV7808BD2TR4 datasheet, pinout, applications, or equivalent options, key selection considerations include its D2PAK-3 package thermal performance (R_θJC = 5.0 °C/W), dropout voltage of 2.0 V at 1.0 A, ripple rejection of 62 dB at 120 Hz, and automotive qualification per AEC-Q100 Grade 1 (−40°C to +125°C).

Technical Context

The NCV7808BD2TR4 implements a monolithic series pass transistor architecture with built-in current limiting, thermal overload protection, and output transistor safe-area compensation. Its design ensures stable regulation without external components while supporting adjustable configurations via external resistors or feedback networks.

It features a fixed 8.0 V output with typical line regulation of 1.7 mV and load regulation of 1.0 mV under 1.0 A conditions, and delivers 62 dB ripple rejection at 120 Hz with 11.5–18 V input range - optimized for noisy automotive battery environments.

Key Specifications

Pinout & Package

D2PAK-3 (TO-263-3) surface-mount package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). Requires PCB copper area for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV7808ABD2TR4 and TL7808CD2TR, the NCV7808BD2TR4 uniquely balances AEC-Q100 Grade 1 qualification, ±3% output tolerance, and D2PAK-3 thermal performance - making it the default choice for production automotive power rails where reliability and qualification are non-negotiable.

Availability

NCV7808BD2TR4 is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and infotainment systems requiring stable component supply across multi-year automotive production cycles.

Supply support for NCV7808BD2TR4 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, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV7800 series is designed specifically for automotive power management - delivering robust, qualified linear regulators that meet stringent AEC-Q100 requirements and operate reliably in harsh vehicle environments.

FAQ

What is the maximum input voltage for the NCV7808BD2TR4?

The NCV7808BD2TR4 supports a maximum input voltage of 35 V DC, as specified in the absolute maximum ratings table. However, for reliable continuous operation with 1.0 A output, the recommended input range is 10.6 V to 25 V - exceeding 25 V increases power dissipation and thermal stress without functional benefit. The device includes internal protection but sustained operation above 25 V requires careful thermal design.

Does the NCV7808BD2TR4 require external capacitors to operate?

Yes, the NCV7808BD2TR4 requires an input capacitor (≥0.33 µF ceramic) placed close to Pin 1 to suppress high-frequency noise and prevent oscillation, especially when located remotely from the main filter. An output capacitor (≥0.1 µF) is not mandatory for stability but strongly recommended to improve transient response - values below 0.1 µF may cause instability under dynamic load conditions.

What is the thermal resistance and how does it affect PCB layout for the NCV7808BD2TR4?

The NCV7808BD2TR4 has a junction-to-case thermal resistance (R_θJC) of 5.0 °C/W. Since the D2PAK-3 package's exposed tab is internally connected to Pin 2 (Ground), effective thermal performance depends on soldering the tab to a large, low-thermal-resistance copper pour on the PCB. Insufficient copper area will raise junction temperature, potentially triggering thermal shutdown under 1.0 A load - layout must allocate ≥4 cm² of 2-oz copper tied to ground plane.

How does the NCV7808BD2TR4 handle short-circuit conditions?

The NCV7808BD2TR4 incorporates internal short-circuit current limiting that caps output current at approximately 0.2 A when the output is shorted to ground - verified at 35 V input and 25°C ambient. This feature works in conjunction with thermal shutdown to prevent damage during sustained faults. Recovery is automatic once the fault is removed and junction temperature falls below the thermal shutdown threshold.

Is the NCV7808BD2TR4 pin-compatible with other devices in the NCV7800 family?

Yes, the NCV7808BD2TR4 shares identical D2PAK-3 pinout (Pin 1: Input, Pin 2: Ground, Pin 3: Output) and mechanical footprint with all NCV78xxxD2TR4 variants (e.g., NCV7805, NCV7812). This allows direct substitution within the same family for different output voltages - provided input voltage range, dropout, and thermal constraints are re-verified for the new voltage level.