onsemi NCP500SN26T1G

Overview

NCP500SN26T1G from onsemi is a fixed-output, low-noise, low-dropout linear regulator (LDO) designed for battery-powered portable electronics. It delivers 150 mA output with 2.6 V nominal output voltage, ultra-low 170 mV dropout at full load, 50 µV_RMS noise (10 Hz–100 kHz, no bypass capacitor), and fast 20 µs enable turn-on time. It operates across 1.8 V to 6.0 V input and supports noise-sensitive RF and timing circuits.

For engineers reviewing the NCP500SN26T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA, RMS noise performance without external bypass, enable logic compatibility down to 1.0 V, thermal shutdown behavior, and DFN 2×2.2 mm package footprint constraints.

Technical Context

The NCP500SN26T1G uses a PMOS pass transistor architecture enabling ultra-low dropout and eliminating the need for an external noise-bypass capacitor. Its internal reference, error amplifier, and protection circuitry (current limit and thermal shutdown) are integrated into a single die optimized for stability with 1.0 µF ceramic output capacitors.

It features rail-to-rail enable input compatibility (logic-high threshold = 0.9 V, logic-low = 0.15 V), allowing direct interfacing with 1.0 V logic systems. The device maintains ±2.5% output voltage accuracy over −40 °C to +85 °C and load current from 1 mA to 150 mA.

Key Specifications

Pinout & Package

Package: DFN 2×2.2 mm, 6-pin, exposed thermal pad (Case 506BA). Pin 6 is GND and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with MCP1700T-2602E/MB and TLC7701QDCKR, the NCP500SN26T1G offers superior noise performance (50 µV_RMS vs. ≥80 µV_RMS) and lower dropout-critical for RF and high-precision analog systems-while occupying a compact DFN 2×2.2 mm footprint with robust thermal grounding.

Availability

NCP500SN26T1G is available at Aetrix Electronics and suitable for RF front-end biasing, precision sensor powering, portable instrumentation, and battery-powered medical devices requiring stable component supply across production lifecycles.

Supply support for NCP500SN26T1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP500 series is part of onsemi's precision analog portfolio, engineered specifically for portable, battery-constrained systems demanding ultra-low noise, fast enable response, and minimal dropout without external bypass components.

FAQ

What is the maximum input voltage rating for the NCP500SN26T1G?

The NCP500SN26T1G has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended maximum continuous input is 5.5 V, especially at elevated ambient temperatures where thermal derating applies. The device achieves optimal dropout performance when Vin is maintained just above Vout + dropout (e.g., ≥2.77 V for 2.6 V output at 150 mA).

Does the NCP500SN26T1G require an external bypass capacitor to achieve its specified 50 µV_RMS noise?

No, the NCP500SN26T1G does not require an external bypass capacitor to achieve its specified 50 µV_RMS noise (10 Hz–100 kHz). This performance is enabled by its internal low-noise architecture and integrated filtering. Adding a bypass capacitor may alter startup behavior and is unnecessary for noise compliance-reducing component count and board space.

Can the NCP500SN26T1G be used with a 1.0 V microcontroller GPIO to control its enable pin?

Yes, the NCP500SN26T1G is explicitly designed for 1.0 V logic compatibility: its enable turn-on threshold is 0.9 V (min), and turn-off threshold is 0.15 V (max). A 1.0 V GPIO can reliably drive the EN pin high to activate the regulator and low to place it in shutdown mode drawing only 0.01 µA quiescent current.

What is the thermal resistance (R_JA) of the NCP500SN26T1G in its DFN 2×2.2 mm package?

The NCP500SN26T1G in the DFN 2×2.2 mm package (Case 506BA) has a typical junction-to-ambient thermal resistance (R_JA) of 225 °C/W under standard JEDEC test conditions (2-layer board, 1-in² copper pad). Actual R_JA depends heavily on PCB layout-especially thermal pad soldering quality and copper area-and can improve significantly with enhanced heatsinking.

Is the NCP500SN26T1G pin-compatible with other variants in the NCP500 family, such as NCP500SN33T1G?

Yes, all NCP500 variants in the DFN 2×2.2 mm package-including NCP500SN26T1G and NCP500SN33T1G-share identical pinout, footprint, and package dimensions (Case 506BA). They differ only in nominal output voltage and marking; electrical characteristics like dropout, noise, and enable thresholds are consistent across the family.