onsemi NCP606MN28T2G

Overview

NCP606MN28T2G from onsemi is a fixed-output 2.8 V, 500 mA low-dropout linear regulator with enable pin, designed for space-constrained portable battery-powered systems. It delivers ±2% output voltage tolerance over −40°C to +125°C, features 170 mV typical dropout at 500 mA, and achieves 62 dB PSRR at 120 Hz - enabling stable power for noise-sensitive analog circuits in notebook computers and portable instrumentation.

For engineers reviewing the NCP606MN28T2G datasheet, pinout, applications, or equivalent options, key selection considerations include its DFN6 3×3.3 mm package with exposed thermal pad, 50 µV_RMS output noise (10 Hz–100 kHz), 0.1 µA disable current, and compatibility with low-ESR ceramic capacitors without stability compensation.

Technical Context

The NCP606MN28T2G integrates a PMOS pass transistor with internal current limiting (675 mA) and thermal shutdown (175°C). Its enable input (active-high, 0.9 V threshold) provides precise system-level power sequencing control independent of input rail voltage.

Unlike the NCP605 variant, the NCP606MN28T2G supports controlled startup via EN pin with 12–30 µs enable time (depending on V_OUT), while maintaining low ground current (145–180 µA across load) and high PSRR up to 10 kHz - critical for powering ADC reference supplies and RF front-end bias rails.

Key Specifications

Pinout & Package

Package: DFN6 3.0×3.3 mm, 0.95 mm pitch, exposed thermal pad (EPAD) connected to GND - optimized for thermal dissipation in compact PCB layouts with ≥645 mm² copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO and TLC7701QDCKR, the NCP606MN28T2G uniquely combines 500 mA output, 2.8 V fixed regulation, enable control, and ultra-low noise in a thermally enhanced DFN6 package - making it optimal for high-density portable systems demanding both performance and layout efficiency.

Availability

NCP606MN28T2G is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and battery-powered industrial sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NCP606MN28T2G 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCP606MN28T2G belongs to onsemi's NCP605/NCP606 family of low-IG_ND, CMOS LDO regulators - engineered specifically for portable battery-powered applications where small size, low noise, and high PSRR are critical design constraints.

FAQ

What is the maximum input voltage rating for the NCP606MN28T2G?

The NCP606MN28T2G has an absolute maximum input voltage rating of 6.5 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input range is 1.5 V to 6.0 V, with minimum Vin = (Vout + VDO) or 1.5 V - meaning ≥3.0 V input is required to sustain 500 mA output at 2.8 V due to its 190 mV typical dropout voltage. The NCP606MN28T2G must never be subjected to reverse input voltage or transient spikes exceeding 6.5 V.

Does the NCP606MN28T2G require external compensation components?

No, the NCP606MN28T2G is internally compensated and stable with 1 µF ceramic output capacitors - no external ESR requirements or compensation networks are needed. This simplifies layout and reduces BOM count. The device was characterized using Murata GRM219R71E105K (1 µF, 25 V, X7R) and works reliably with standard 0805 or 0603 ceramic capacitors. The NCP606MN28T2G maintains phase margin >45° across temperature and load conditions without added components.

How does the enable pin (EN) function on the NCP606MN28T2G?

The EN pin on the NCP606MN28T2G is an active-high digital control input with 0.9 V minimum logic-high threshold and 0.4 V maximum logic-low threshold. When EN ≥ 0.9 V, the regulator powers up with 12–30 µs turn-on time depending on output voltage; when EN ≤ 0.4 V, it enters shutdown with 0.1 µA disable current. The NCP606MN28T2G does not require pull-up resistors - tying EN directly to Vin ensures always-on operation, while connecting to a microcontroller GPIO enables precise power sequencing in multi-rail systems.

What thermal performance can be expected from the NCP606MN28T2G in a standard PCB layout?

When soldered on a 645 mm², 1 oz copper FR4 board, the NCP606MN28T2G exhibits 75°C/W junction-to-ambient thermal resistance (R_JA). At 500 mA output with 3.0 V input (0.2 V dropout), power dissipation is ~100 mW - resulting in ~7.5°C junction rise above ambient. With ambient at 85°C, junction temperature remains well below the 150°C absolute maximum. The exposed pad (EPAD) must be soldered to a solid GND plane to achieve this R_JA; insufficient thermal vias or isolated pads will degrade performance significantly. The NCP606MN28T2G includes thermal shutdown at 175°C for fault protection.

Is the NCP606MN28T2G compatible with ceramic capacitors having very low ESR?

Yes, the NCP606MN28T2G is explicitly designed to operate stably with low-ESR ceramic capacitors - including X5R, X7R, and C0G types - without requiring minimum ESR or external compensation. Unlike many older LDOs, it contains internal frequency compensation that ensures stability down to 1 µF capacitance with ESR < 10 mΩ. Test data confirms stable operation with Murata GRM219R71E105K (1 µF, 25 V, X7R) and GRM21BR71A106K (10 µF, 10 V, X7R). The NCP606MN28T2G does not oscillate or exhibit ringing under load transients when paired with these capacitors.