onsemi NCP584HSN25T1G

Overview

NCP584HSN25T1G from onsemi is a tri-mode 200 mA CMOS low-dropout regulator with enable and ECO pin for mode selection, delivering a precise 2.5 V output voltage in SOT23−5 package. It supports Fast Transient (FT) and Low Power (LP) modes via the ECO pin, achieves 200 mV dropout at 200 mA load, and maintains ±2% output accuracy in FT mode for portable battery-powered systems.

For engineers reviewing the NCP584HSN25T1G datasheet, pinout, applications, or equivalent options, key selection considerations include its 2.5 V fixed output, ultra-low 40 µA quiescent current in FT mode, 75 dB PSRR at 1 kHz, tri-mode operation flexibility, and SOT23−5 footprint compatibility with space-constrained handheld designs.

Technical Context

The NCP584HSN25T1G implements a CMOS-based LDO architecture with internal reference and error amplifier, supporting three operational states: Chip Enable (CE), Fast Transient (FT), and Low Power (LP). Mode switching is controlled by the ECO pin-driven high for FT mode (40 µA I_q, 20 mV load regulation) or grounded for LP mode (3.5 µA I_q, ±3% accuracy).

It features fold-back current limiting, 100 ppm/°C output voltage temperature coefficient, and operates across −40°C to +85°C ambient. Input voltage range is 1.4 V to 6.0 V, with maximum 6.5 V absolute rating, enabling use with single-cell Li-ion, multi-cell alkaline, or USB-supplied systems.

Key Specifications

Pinout & Package

SOT23−5 package (Case 1212), 2.8 mm × 2.5 mm footprint, 0.95 mm pitch, Pb-free, surface-mountable with thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and TLS850F2TE/V1, the NCP584HSN25T1G uniquely offers dynamic tri-mode operation-allowing designers to optimize for either ultra-low I_q (LP) or fast load-step response (FT) without hardware changes, while maintaining identical 2.5 V output and SOT23−5 footprint.

Availability

NCP584HSN25T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, and smart camera modules requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP584HSN25T1G 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 focused on energy-efficient electronics, serving automotive, industrial, cloud, and medical markets with discrete, analog, and power management solutions.

The NCP584HSN25T1G belongs to the NCP584 series of tri-mode CMOS LDOs, designed specifically for battery-powered portable equipment where dynamic power-state optimization, tight output accuracy, and ultra-low quiescent current are essential.

FAQ

What is the output voltage tolerance of the NCP584HSN25T1G in Fast Transient mode?

The NCP584HSN25T1G has an output voltage tolerance of ±2% in Fast Transient (FT) mode, specified over −40°C to +85°C ambient temperature and 1.0 mA to 200 mA load current. This tight tolerance ensures reliable operation of 2.5 V logic and analog components without external trimming. The NCP584HSN25T1G achieves this using a precision bandgap reference and low-drift error amplifier.

How does the ECO pin affect quiescent current in the NCP584HSN25T1G?

The ECO pin directly selects operating mode: when pulled high (to Vin), the NCP584HSN25T1G enters Fast Transient mode with 40 µA quiescent current; when tied to GND, it enters Low Power mode with only 3.5 µA I_q. This dual-mode capability allows system-level power optimization-e.g., using FT mode during active sensing and LP mode during sleep. The NCP584HSN25T1G's ECO pin does not require external pull-up/down resistors if driven actively.

What is the minimum recommended output capacitance for stable operation of the NCP584HSN25T1G?

The NCP584HSN25T1G requires a minimum 2.2 µF tantalum capacitor on the Vout pin for guaranteed stability in both FT and LP modes. Ceramic capacitors may be used if series resistance (~1 Ω) is added to emulate ESR; the minimum ESR for ceramic types is 40 mΩ in LP mode and varies with load in FT mode (e.g., 100 mΩ at 200 mA for 2.5 V output). The NCP584HSN25T1G's stability is highly dependent on proper output capacitor selection and PCB layout.

Can the NCP584HSN25T1G be used with a 1.8 V input supply?

No-the NCP584HSN25T1G requires a minimum input voltage of 1.4 V plus dropout; for 2.5 V output, Vin must be ≥2.7 V to maintain regulation at full 200 mA load. At 1.8 V input, the device enters dropout and cannot sustain 2.5 V output. The NCP584HSN25T1G is intended for use with ≥2.7 V sources such as single-cell Li-ion (3.0–4.2 V), two-cell alkaline (3.0 V nominal), or regulated 3.3 V rails.

Does the NCP584HSN25T1G include overtemperature protection?

The NCP584HSN25T1G incorporates thermal shutdown protection that disables the output when junction temperature exceeds approximately 125°C, preventing permanent damage. Recovery is automatic once temperature falls below the hysteresis threshold. While not explicitly labeled "overtemperature protection" in the datasheet, the maximum junction temperature rating (T_J(max) = 125°C) and thermal shutdown behavior are confirmed in the Absolute Maximum Ratings and functional description. The NCP584HSN25T1G relies on PCB copper area for heat dissipation given its 250 mW power dissipation limit.