onsemi NCP582DXV33T2G

Overview

NCP582DXV33T2G from onsemi is a 3.3 V, 150 mA ultra-low-dropout CMOS linear regulator with active-high enable and auto-discharge functionality, designed for portable battery-powered systems requiring high PSRR (70 dB @ 1 kHz), low output noise (30 µV_RMS), and ±2% output voltage accuracy over load/temperature. It operates from 2.0–6.0 V input and delivers stable regulation in space-constrained SOT-563 packaging.

For engineers reviewing the NCP582DXV33T2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (220 mV typ), quiescent current (75 µA typ), shutdown current (<1.0 µA), thermal performance in 400 mW-rated SOT-563, and compatibility with 0.47 µF ceramic output capacitors.

Technical Context

The NCP582DXV33T2G integrates a precision bandgap reference, error amplifier, and P-channel pass transistor to achieve ultra-low dropout and fast transient response. Its active-high CE pin enables auto-discharge via an internal N-channel switch that discharges V_OUT when disabled, preventing residual voltage hold-up in power sequencing-critical systems.

Designed for low-noise analog and RF subsystems, it features 30 µV_RMS integrated output noise (10 Hz–100 kHz) without external bypass capacitors and maintains 70 dB PSRR up to 1 kHz-critical for powering ADCs, sensors, and wireless transceivers in battery-operated instrumentation.

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 ground pins for improved thermal dissipation and low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3302E/MB and XC6206P332MR-G, the NCP582DXV33T2G uniquely combines ultra-low dropout (220 mV), active-high enable with auto-discharge, and 70 dB PSRR in a 6-pin SOT-563-making it optimal for battery-powered systems demanding precise power sequencing and clean analog/RF supplies.

Availability

NCP582DXV33T2G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, and wireless IoT end nodes requiring stable component supply, long-term lifecycle support, and Pb-free RoHS-compliant packaging.

Supply support for NCP582DXV33T2G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP582 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for portable battery-powered equipment where low noise, low I_Q, and tight output accuracy are critical to system performance and battery longevity.

FAQ

What is the maximum input voltage rating for the NCP582DXV33T2G?

The NCP582DXV33T2G has an absolute maximum input voltage (V_IN) rating of 6.5 V. Operation above this level risks permanent device damage. The recommended operating range is 2.0 V to 6.0 V, ensuring optimal regulation, dropout, and thermal performance across all load conditions. This range supports common battery chemistries including single-cell Li-ion (up to 4.2 V), dual-cell alkaline (up to 3.2 V), and regulated 5 V rails.

Does the NCP582DXV33T2G require an external noise-reduction capacitor?

No, the NCP582DXV33T2G does not require an external noise-reduction capacitor. Its intrinsic output noise is specified at 30 µV_RMS (10 Hz–100 kHz) without any additional bypass components. This low-noise performance is achieved through internal design optimizations, allowing designers to eliminate extra capacitors and reduce PCB footprint-particularly valuable in space-constrained portable devices where the NCP582DXV33T2G is commonly deployed.

How does the auto-discharge feature work on the NCP582DXV33T2G?

When the CE pin is driven low (disabled state), the NCP582DXV33T2G activates an internal 60 Ω N-channel MOSFET between V_OUT and GND, actively discharging the output capacitor. This prevents residual voltage from lingering on downstream circuitry, enabling safe and predictable power-down sequencing in multi-rail systems. The discharge time depends on output capacitance and load but is typically sub-millisecond for standard 0.47 µF ceramic capacitors used with the NCP582DXV33T2G.

What is the thermal performance of the NCP582DXV33T2G in its SOT-563 package?

The NCP582DXV33T2G in SOT-563 (Case 463A) has a maximum power dissipation rating of 500 mW at T_A = 25°C. Its thermal resistance θ_JA is approximately 250°C/W under standard JEDEC 2-layer board conditions. At full 150 mA load with 3.3 V output and 6.0 V input (2.7 V dropout), power dissipation reaches 405 mW-requiring adequate copper pour and airflow for reliable operation above 60°C ambient. Derating is advised per the device's thermal characteristics curves in the datasheet.

Can the NCP582DXV33T2G be used with ceramic output capacitors smaller than 0.47 µF?

No-the NCP582DXV33T2G is optimized for stability with a minimum 0.47 µF ceramic output capacitor when V_OUT ≥ 2.5 V (including 3.3 V). Using smaller values may cause oscillation or degraded transient response due to insufficient phase margin. The datasheet explicitly recommends 0.47 µF for 3.3 V operation and specifies ESR requirements (≤10 mΩ) to ensure loop stability. Deviating from this violates the validated design conditions for the NCP582DXV33T2G.