onsemi NCP630GD2TG

Overview

NCP630GD2TG from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 3.0 A output current with 3.47 V nominal output and maximum 1.25 V dropout at full load over −40°C to 125°C junction temperature. It features internal 1.5% output voltage accuracy, thermal shutdown, current limiting, and TTL-compatible shutdown control - designed for microprocessor and DSP power supplies where stable, low-noise local regulation is required.

For engineers reviewing the NCP630GD2TG datasheet, pinout, applications, or equivalent options, key selection considerations include its D2PAK-5 package thermal performance, 3.47 V fixed output tolerance (±1.5%), fast 25 µs turn-on delay, 85 dB ripple rejection at 1 kHz, and remote sense capability for improved load regulation in distributed power systems.

Technical Context

The NCP630GD2TG implements a high-current LDO architecture with an internal bandgap reference trimmed to ±1.5% and a precision error amplifier driving a PNP pass transistor. Its SENSE pin enables Kelvin sensing for accurate regulation at the load, decoupling output voltage stability from PCB trace resistance.

Thermal protection activates at 165°C with automatic recovery, while current limiting provides short-circuit protection up to 5.0 A typical. Shutdown functionality draws only 26 µA in quiescent mode and accepts logic-level inputs (V_TH(HI) = 2.0 V, V_TH(LO) = 0.8 V), enabling direct interfacing with microcontrollers without level-shifting.

Key Specifications

Pinout & Package

D2PAK-5 surface-mount package (Case 936A) with exposed metal tab electrically connected to Pin 3 (Ground) for enhanced thermal dissipation; R_JA = 45°C/W on standard PCB, R_JC = 5.0°C/W to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1963AEDD-3.3 and TPS7A8300RGRT, the NCP630GD2TG offers unique combination of 3.47 V fixed output, integrated remote sense, D2PAK thermal robustness, and industrial temperature rating - making it optimal for high-current, point-of-load regulation where accuracy at the load matters more than minimal dropout.

Availability

NCP630GD2TG is available at Aetrix Electronics and suitable for microprocessor power supplies, DSP power rails, and SMPS post-regulation applications requiring stable component supply, Pb-free compliance, and extended temperature operation.

Supply support for NCP630GD2TG 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, sensors, and connectivity solutions for automotive, industrial, and cloud power markets.

The NCP630GD2TG belongs to onsemi's high-current linear regulator product line, engineered specifically for demanding point-of-load regulation in computing, communications, and industrial control systems where precision, reliability, and thermal resilience are critical.

FAQ

What is the output voltage tolerance of the NCP630GD2TG over temperature?

The NCP630GD2TG guarantees 3.47 V output with ±1.5% accuracy over the full operating junction temperature range of 0°C to 125°C. This is achieved via on-chip trimming of the internal reference, and the specification is validated per the datasheet's electrical characteristics table for the NCP630G variant. The NCP630GD2TG maintains this tolerance without external components.

Does the NCP630GD2TG require external capacitors, and what are their minimum values?

Yes, the NCP630GD2TG requires a minimum 68 µF aluminum or tantalum input capacitor (ESR ≤5.0 Ω) and a minimum 33 µF aluminum or tantalum output capacitor (ESR ≤2.0 Ω) for stability. Ceramic capacitors are not recommended in parallel due to potential instability. These values are specified in the Application Information section of the official datasheet and verified across temperature and load conditions.

How does the SENSE pin on the NCP630GD2TG improve regulation accuracy?

The SENSE pin on the NCP630GD2TG enables remote voltage sensing by connecting directly to the load point, allowing the regulator to compensate for voltage drop across PCB traces or connectors. This maintains ±1.5% output accuracy at the load even with up to 100 mΩ of series resistance - a capability not available in standard LDOs and critical for high-current, distributed power architectures.

What thermal protection features does the NCP630GD2TG include?

The NCP630GD2TG incorporates thermal shutdown that activates at 165°C junction temperature, with automatic recovery as the die cools. This protects against catastrophic failure during overload or inadequate heatsinking. Its D2PAK-5 package includes an exposed ground tab designed for PCB copper thermal spreading, achieving R_JA = 45°C/W on standard layouts - a value confirmed in the Thermal Characteristics section of the datasheet.

Is the NCP630GD2TG pin-compatible with other NCP630 variants like the NCP630AD2TG?

No, the NCP630GD2TG is not pin-compatible with the adjustable NCP630AD2TG. While both use the D2PAK-5 package and share Pin 1 (Shutdown), Pin 2 (Vin), Pin 3 (Ground), and Pin 4 (Vout), Pin 5 serves as SENSE on the NCP630GD2TG but as ADJ on the NCP630AD2TG. Swapping them would disconnect the feedback path and cause regulation failure.