onsemi NCP584HSN31T1G

Overview

NCP584HSN31T1G from onsemi is a tri-mode 200 mA CMOS low-dropout (LDO) regulator with enable and ECO pin for mode selection, delivering a precise 3.1 V output voltage in SOT23−5 package. It supports Chip Enable (CE), Fast Transient (FT), and Low Power (LP) modes, features 400 mV dropout at 200 mA (for 0.9 V variant; 3.1 V variant achieves ≤100 mV), ±2% output accuracy, and 75 dB PSRR at 1 kHz - used in portable battery-powered systems requiring stable low-noise supply for microcontrollers or sensors.

For engineers reviewing the NCP584HSN31T1G datasheet, pinout, applications, or equivalent options, key selection criteria include output voltage tolerance (±2%), ultra-low quiescent current (40 µA FT / 3.5 µA LP), shutdown current (0.1 µA), dropout performance across load/temperature, and ECO-pin-controlled tri-mode operation for dynamic power optimization.

Technical Context

The NCP584HSN31T1G implements a CMOS-based LDO architecture with internal bandgap reference, error amplifier, and pass transistor, supporting three distinct operating modes via the ECO pin: CE-only active mode, FT mode (optimized for transient response), and LP mode (optimized for quiescent current). Its feedback loop is internally compensated for stability with ≥2.2 µF ceramic or tantalum output capacitors.

Mode selection is determined by ECO pin voltage: VECO = Vin enables FT mode (40 µA Iq, 20 mV load regulation); VECO = GND enables LP mode (3.5 µA Iq, 10 mV load regulation, ±3% accuracy); CE pin controls on/off state independently. Input voltage range is 1.4–6.0 V, with absolute maximum Vin = 6.5 V and thermal shutdown protection.

Key Specifications

Pinout & Package

SOT23−5 package (Case 1212), 2.8 mm × 2.5 mm footprint, 1.0–1.3 mm height, Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3102E/TT and XC6206P312MR-G, the NCP584HSN31T1G uniquely provides selectable FT/LP modes via ECO pin - enabling one hardware design to meet both high-performance and ultra-low-power requirements without layout change or firmware update.

Availability

NCP584HSN31T1G is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered IoT edge nodes, and handheld consumer electronics requiring stable component supply with guaranteed long-term manufacturability and Pb-free compliance.

Supply support for NCP584HSN31T1G 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCP584HSN31T1G belongs to onsemi's precision LDO regulator product line, designed specifically for battery-constrained portable applications demanding dynamic power-state optimization, high accuracy, and robust noise rejection.

FAQ

What is the maximum input voltage rating for the NCP584HSN31T1G?

The NCP584HSN31T1G has an absolute maximum input voltage (Vin) rating of 6.5 V. The recommended operating input range is 1.4 V to 6.0 V. Exceeding 6.5 V may cause permanent damage. For reliable operation with margin, keep Vin ≤6.0 V, especially at elevated temperatures where junction heating increases stress on the internal pass element.

How does the ECO pin affect the NCP584HSN31T1G's output voltage accuracy?

When the ECO pin is tied to GND, the NCP584HSN31T1G operates in Low Power (LP) mode, where output voltage accuracy degrades to ±3%. In Fast Transient (FT) mode (ECO = Vin), accuracy remains ±2%. This trade-off is intentional: LP mode prioritizes ultra-low Iq (≈4.5–6.0 µA for 3.1 V), while FT mode preserves full specification accuracy for active operation.

Can the NCP584HSN31T1G be used with ceramic output capacitors?

Yes, the NCP584HSN31T1G supports ceramic output capacitors, but requires a 1 Ω resistor in series with the capacitor to ensure stability - per onsemi Application Information section. Minimum ESR guidelines apply: ≥40 mΩ in LP mode; for FT mode, minimal ESR depends on output current and voltage (e.g., ~100 mΩ at 200 mA for 3.1 V). Always verify stability with actual board layout and load conditions.

What is the typical dropout voltage of the NCP584HSN31T1G at 200 mA load?

The typical dropout voltage of the NCP584HSN31T1G at 200 mA load is ≤100 mV for the 3.1 V output version, based on extrapolation from datasheet curves (Figures 20–22) and the trend that dropout decreases with higher Vout. At 25°C, this enables stable regulation down to Vin = 3.2 V - critical for single-cell Li-ion systems nearing end-of-discharge.

Does the NCP584HSN31T1G include thermal shutdown protection?

Yes, the NCP584HSN31T1G includes thermal shutdown protection with a maximum junction temperature (TJ(max)) of 125°C. When die temperature exceeds this threshold, the regulator disables output to prevent damage. Recovery occurs automatically once temperature falls below the hysteresis threshold (~15°C below trip point). This feature is inherent to the IC's design and requires no external components.