onsemi NCP565MN12T2G

Overview

NCP565MN12T2G from onsemi is a fixed-output, low-dropout linear regulator delivering 1.5 A at 1.2 V with 0.9 V reference voltage, 0.9 V dropout at full load, and ultra-fast transient response-ideal for post-regulation in ASIC power supplies and server VRMs where tight voltage tolerance and dynamic load stability are critical.

For engineers reviewing the NCP565MN12T2G datasheet, pinout, applications, or equivalent options, key selection criteria include output accuracy (±2% over −10°C to 105°C), thermal shutdown at 160°C, ground current of 1.5 mA at 1.5 A load, ripple rejection of 85 dB at 120 Hz, and compatibility with ceramic/tantalum/aluminum-electrolytic output capacitors down to 1.0 µF.

Technical Context

The NCP565MN12T2G implements a precision bandgap reference (0.9 V ±2%) driving a high-gain error amplifier and low-impedance output stage, enabling stable regulation under rapid load transients. Its internal current-limit circuit triggers at 3.3 A typical and thermal shutdown activates at 160°C junction temperature.

Designed for DFN6 (3×3.3 mm) packaging with exposed thermal pad, the device achieves R_JA = 176°C/W and R_JP = 37°C/W-requiring PCB copper heat spreading per datasheet guidelines. It operates across −40°C to 125°C ambient and supports input voltages from 2.5 V up to 18 V.

Key Specifications

Pinout & Package

Package: DFN6 (3 mm × 3.3 mm, 0.95 mm height), thermally enhanced with exposed pad (Tab = Ground). RoHS-compliant, Pb-free (G suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73312PDBVR and TPS7A2012PDQNR, the NCP565MN12T2G uniquely delivers 1.5 A output at 1.2 V in a thermally optimized DFN6 package-making it the only viable option among the three for high-current, low-noise post-regulation in servers and ASICs.

Availability

NCP565MN12T2G is available at Aetrix Electronics and suitable for ASIC power supplies, server VRM post-regulation, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP565MN12T2G 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, cloud, and medical markets.

The NCP565MN12T2G belongs to onsemi's NCP565 low-dropout linear regulator family-designed specifically for high-current, low-noise post-regulation in demanding digital systems where fast transient response and thermal robustness are essential.

FAQ

What is the maximum input voltage rating for the NCP565MN12T2G?

The NCP565MN12T2G has an absolute maximum input voltage rating of 18 V. Operation above this level risks permanent damage. For reliable continuous use, the recommended operating input range is 2.5 V to 9.0 V-ensuring sufficient headroom above the 1.2 V output while maintaining low dropout performance. The minimum input is defined as V_OUT + V_DO or 2.5 V, whichever is greater.

Does the NCP565MN12T2G require external capacitors, and what values are recommended?

Yes, the NCP565MN12T2G requires both input and output capacitors for stability and transient performance. A 150 µF OSCON-type input capacitor is recommended, placed directly across VIN and GND pins. For output, the device remains stable with ≥1.0 µF ceramic, tantalum, or aluminum-electrolytic capacitors having ESR between 50 mΩ and 2.5 Ω-though the datasheet optimizes for 150 µF + 10 µF parallel configuration to balance transient response and AC stability.

How does thermal performance differ between the DFN6 package of NCP565MN12T2G and other variants like D2PAK?

The NCP565MN12T2G in DFN6 exhibits R_JA = 176°C/W and R_JP = 37°C/W (with 50 mm² 1 oz Cu), whereas the D2PAK-5 variant achieves R_JC = 3°C/W and R_JA = 83°C/W. This means the DFN6 relies more heavily on PCB copper area for heat dissipation, while D2PAK offers superior junction-to-case conduction. For 1.5 A operation at elevated ambient temperatures, the DFN6 version requires careful thermal pad layout per datasheet Figure 25 to avoid exceeding 150°C maximum junction temperature.

Is the NCP565MN12T2G pin-compatible with other NCP565 variants such as adjustable or different voltage versions?

No, the NCP565MN12T2G is not pin-compatible with adjustable versions (e.g., NCP565MNADJT2G) or other fixed-voltage DFN6 variants like NCP565MN15T2G. While all share the same DFN6-6 package outline, pin functions differ: the 1.2 V fixed version uses Pins 1/4/6 as ground, Pin 2/5 as V_OUT, and Pin 3 as V_IN; adjustable versions repurpose Pin 5 as ADJ. Swapping parts without PCB revision will cause functional failure.

What protection features are integrated into the NCP565MN12T2G?

The NCP565MN12T2G integrates three key protections: current limit (3.3 A typical), thermal shutdown (160°C junction), and short-circuit robustness. These operate independently-current limiting engages first under overload, followed by thermal shutdown if dissipation persists. Unlike some regulators, it does not include reverse-voltage or reverse-current protection, so external diodes may be needed in systems with large output capacitance and risk of input shorting.