onsemi NCP582DXV25T2G

Overview

NCP582DXV25T2G from onsemi is an ultra-fast, low-noise 150 mA CMOS LDO regulator with active-high enable and auto-discharge functionality, delivering a precise 2.5 V output voltage, 220 mV dropout at 150 mA, and 30 µV_RMS output noise (10 Hz–100 kHz). It operates from 2.0 V to 6.0 V input and targets portable battery-powered systems requiring high PSRR (70 dB @ 1 kHz) and tight output accuracy (±2%).

For engineers reviewing the NCP582DXV25T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-563 package, 75 µA quiescent current, fast load transient response, −40°C to +85°C operating range, and compatibility with 0.47 µF ceramic output capacitance for 2.5 V output.

Technical Context

The NCP582DXV25T2G implements a CMOS-based LDO architecture with internal bandgap reference, error amplifier, and pass transistor-optimized for low dropout and minimal noise generation without external bypass capacitors. Its active-high CE pin integrates auto-discharge via an internal 60 Ω N-channel switch that discharges V_OUT when disabled.

It features fold-back current limiting, thermal shutdown protection, and exhibits excellent line regulation (0.02%/V typical) and load regulation (22 mV typical over 1–150 mA), enabling stable operation in dynamically varying load conditions common in handheld instrumentation and imaging devices.

Key Specifications

Pinout & Package

SOT-563 (XV suffix, Case 463A) - 6-pin, 1.6 mm × 1.2 mm × 0.6 mm surface-mount package with two GND pins for improved thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/TT and TCS2115-2.5V, the NCP582DXV25T2G uniquely combines auto-discharge, 220 mV dropout, and 30 µV_RMS noise in a 6-pin SOT-563 package-making it optimal for space-constrained, noise-sensitive, battery-fed systems requiring controlled power-down sequencing.

Availability

NCP582DXV25T2G is available at Aetrix Electronics and suitable for portable medical sensors, handheld test meters, and digital camcorders requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP582DXV25T2G 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, with leadership in power management, analog, and sensor technologies.

The NCP582 series belongs to onsemi's ultra-low-noise LDO portfolio, designed specifically for portable battery-powered applications demanding high accuracy, low I_Q, and robust transient performance.

FAQ

What is the recommended input and output capacitance for NCP582DXV25T2G?

The NCP582DXV25T2G requires a 1.0 µF ceramic capacitor between VIN and GND. For the 2.5 V output, a 0.47 µF ceramic capacitor is specified between VOUT and GND. These values ensure stability, low noise, and optimal transient response per the datasheet's Application Information section. Using capacitors with low ESR and placing them close to the respective pins is critical for reliable operation.

Does NCP582DXV25T2G support auto-discharge, and how does it work?

Yes, NCP582DXV25T2G implements auto-discharge via an internal 60 Ω N-channel MOSFET connected between VOUT and GND. When the CE pin is driven low (disable state), this switch activates and actively discharges the output capacitor, preventing back-powering of upstream circuitry. This behavior is confirmed in the Pin Function Description and Electrical Characteristics tables of the datasheet.

What is the maximum output current and thermal limit of NCP582DXV25T2G?

The NCP582DXV25T2G delivers up to 150 mA continuous output current. Its absolute maximum junction temperature is 125°C, and maximum power dissipation is 500 mW in the SOT-563 package. Derating is required above +85°C ambient; thermal performance depends on PCB copper area and airflow. The device includes thermal shutdown protection to prevent damage under overload or high-temperature conditions.

Is NCP582DXV25T2G compatible with 1.8 V logic-level enable signals?

Yes, NCP582DXV25T2G is compatible with 1.8 V logic. Its enable threshold specifies V_ENH (min) = 1.5 V and V_ENL (max) = 0.3 V, meaning a 1.8 V GPIO will reliably assert CE high. This is explicitly verified in the Electrical Characteristics table under "Enable Input Threshold Voltage" and applies directly to the NCP582DXV25T2G variant.

How does the output voltage accuracy of NCP582DXV25T2G impact system design?

The NCP582DXV25T2G guarantees output voltage accuracy of ±2% over temperature and load (2.45 V to 2.55 V at 25°C). This tight tolerance eliminates need for post-regulation trimming in most applications and ensures reliable operation of 2.5 V-tolerant peripherals like ADC references, comparators, and logic I/O. Accuracy is maintained across −40°C to +85°C ambient, supporting industrial-grade designs.