onsemi NCP692MN25T2G

Overview

NCP692MN25T2G from onsemi is a fixed-output 2.5 V, 1 A CMOS low-dropout (LDO) voltage regulator in a 6-lead DFN3x3 package. It features ±2% output voltage tolerance over −40°C to 125°C, 190 mV dropout at 1 A (V_OUT = 2.5 V), active output discharge, and active-high enable functionality - designed for space-constrained portable battery-powered systems such as FPGA and microprocessor core rails.

For engineers reviewing the NCP692MN25T2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1 A output current, low ground current (145 µA typical at 1 A load), high PSRR (62 dB at 120 Hz), thermal shutdown (175°C), and compatibility with low-ESR ceramic capacitors without minimum ESR requirements.

Technical Context

The NCP692MN25T2G implements a PMOS pass transistor architecture with bandgap reference, internal current limiting, and thermal shutdown circuitry. Its fixed 2.5 V output is trimmed at wafer test, eliminating external feedback components and simplifying layout for noise-sensitive analog and digital loads.

It supports active-high enable control (VEN threshold: 0.9 V min high, 0.4 V max low), delivers 50 µV_RMS output noise (200 Hz–100 kHz), and maintains regulation down to 1.5 V input - enabling use with Li-ion, Li-polymer, and multi-cell alkaline supplies in portable electronics.

Key Specifications

Pinout & Package

Package: DFN6 3×3 mm, 0.95 mm pitch, exposed thermal pad (Case 506AH, MN suffix). Thermal resistance R_JA = 70°C/W with 645 mm² copper area - requires PCB thermal relief for >500 mW dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP691MN25T2G, the NCP692MN25T2G adds active output discharge and active-high enable - simplifying power sequencing in modern SoC-based designs. Versus MCP1703T-2502E/MB, it delivers 4× higher current, 3× lower dropout, and remote sensing - making it suitable for demanding FPGA/DSP applications where the latter cannot scale.

Availability

NCP692MN25T2G is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O regulation, portable SSD controller bias, and industrial sensor signal chain applications requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.

Supply support for NCP692MN25T2G 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, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The NCP692MN25T2G belongs to the NCP69x family of high-performance CMOS LDOs engineered for portable, battery-powered systems demanding low dropout, low noise, and enhanced ESD robustness in compact DFN packages.

FAQ

What is the maximum input voltage rating for the NCP692MN25T2G?

The NCP692MN25T2G has an absolute maximum input voltage (VIN) rating of 6.5 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input range is 1.5 V to 6.0 V - with minimum VIN determined by dropout voltage: VIN ≥ VOUT + VDO (e.g., ≥2.69 V at 1 A for NCP692MN25T2G).

Does the NCP692MN25T2G require an external bypass capacitor for low-noise operation?

No, the NCP692MN25T2G does not require an external bypass capacitor. It achieves 50 µV_RMS output noise (200 Hz–100 kHz) without one - unlike many low-noise LDOs that depend on large external capacitors and suffer slow startup. This simplifies design and reduces BOM count while maintaining fast 50 µs turn-on time.

How is the SNS pin used in the NCP692MN25T2G, and what happens if it's left unconnected?

The SNS pin on the NCP692MN25T2G must be connected directly to the OUT pin. It enables remote voltage sensing to compensate for IR drop across PCB traces or connectors. Leaving SNS unconnected or routing it separately causes output regulation error - typically resulting in ~1–2% higher than nominal output voltage at the load due to feedback loop misconfiguration.

What thermal considerations apply when using the NCP692MN25T2G at full 1 A load?

At 1 A and 2.5 V output with 3.3 V input, the NCP692MN25T2G dissipates ~0.8 W. With R_JA = 70°C/W (645 mm² copper), junction temperature rise is ~56°C above ambient. To stay within 125°C max TJ, ambient must remain ≤69°C. Use of the exposed thermal pad and ≥645 mm² GND copper pour is mandatory for full-load operation.

Is the NCP692MN25T2G pin-compatible with other members of the NCP69x family?

Yes, the NCP692MN25T2G shares identical DFN6 3×3 mm pinout and footprint with all NCP690/NCP691/NCP692/NCV8690 variants - including adjustable versions. However, EN logic polarity differs: NCP692 uses active-high, while NCP691 uses active-low. Swapping them requires verifying enable signal compatibility and confirming SNS usage matches the fixed-version configuration.