onsemi NCP585HSN30T1G

Overview

NCP585HSN30T1G from onsemi is a tri-mode 300 mA CMOS low-dropout (LDO) regulator with enable and ECO pin for mode selection, delivering a fixed 3.0 V output voltage in SOT-23-5 package. It supports Chip Enable (CE), Fast Transient (FT), and Low Power (LP) modes, features 550 mV dropout at 300 mA (V_OUT = 0.9 V), 2% output accuracy, and 70 dB PSRR at 1 kHz - optimized for portable battery-powered systems requiring stable low-noise supply under dynamic load.

For engineers reviewing the NCP585HSN30T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tri-mode operation (FT/LP via ECO), ultra-low quiescent current (3.5 µA in LP mode), shutdown current of 0.1 µA, input voltage range up to 6.5 V, and compatibility with ceramic output capacitors as low as 1.0 µF.

Technical Context

The NCP585HSN30T1G implements a CMOS-based LDO architecture with internal reference, error amplifier, and pass transistor, supporting three distinct operating modes controlled by the ECO pin: CE mode (standard enable), FT mode (ECO = V_IN, optimized for transient response), and LP mode (ECO = GND, minimized I_Q). Its foldback current limiting and thermal shutdown protect against overload and fault conditions.

It operates across −40°C to +85°C ambient temperature, maintains 100 ppm/°C output voltage drift, achieves 0.01%/V line regulation in FT mode, and delivers 15 mV load regulation (1–300 mA) in FT mode - all while sustaining stable regulation with 1.0 µF ceramic output capacitance and low-ESR requirements validated per stability curves.

Key Specifications

Pinout & Package

SOT-23-5 package (Case 1212), surface-mount, Pb-free, with 1.0 mm pitch and exposed pad not present. Dimensions: 2.9 × 2.8 × 1.3 mm (D × E × A2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/TT and XC6206P302MR-G, the NCP585HSN30T1G uniquely provides selectable Fast Transient and Low Power modes via ECO pin - enabling design-level trade-offs between response speed and battery longevity without changing BOM or layout.

Availability

NCP585HSN30T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial handheld scanners, smart remote controls, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for NCP585HSN30T1G 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 specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP585HSN30T1G belongs to the NCP585 series of tri-mode CMOS LDO regulators, designed specifically for portable battery-powered equipment demanding precision output, ultra-low quiescent current, and adaptive power-performance optimization.

FAQ

What is the maximum input voltage rating for the NCP585HSN30T1G?

The NCP585HSN30T1G has an absolute maximum input voltage (V_IN) rating of 6.5 V. Operation beyond this value may cause permanent damage. Recommended operating input range is 1.4 V to 6.0 V, ensuring proper regulation across the full 3.0 V output load range and temperature extremes.

How does the ECO pin affect the performance of the NCP585HSN30T1G?

The ECO pin selects between Fast Transient (ECO = V_IN) and Low Power (ECO = GND) modes. In FT mode, the NCP585HSN30T1G delivers 15 mV load regulation and faster transient response; in LP mode, it reduces quiescent current to 3.5 µA (for V_OUT < 1.6 V) at the expense of relaxed regulation specs. The pin must be hard-wired - not left floating.

What output capacitor is recommended for stable operation of the NCP585HSN30T1G?

A 1.0 µF ceramic capacitor with low ESR is recommended for stable operation of the NCP585HSN30T1G. The datasheet confirms stability across 0.1–100 µF output capacitance values in LP mode, and validates 1.0 µF as optimal for FT mode with minimal board area and cost. Placement must be adjacent to the Vout pin with short traces.

Does the NCP585HSN30T1G support active-high enable, and what are the threshold voltages?

Yes, the NCP585HSN30T1G uses an active-high CE pin. The enable threshold is defined as V_THENH ≥ 1.0 V (min) and V_THENL ≤ 0.3 V (max). When CE is below 0.3 V, the device enters shutdown with 0.1 µA current draw; when above 1.0 V, regulation is active. No external pull-up is required for standard logic-level interfacing.

What is the dropout voltage of the NCP585HSN30T1G at 300 mA output current?

For the NCP585HSN30T1G (3.0 V output), the typical dropout voltage at 300 mA is 230 mV in Fast Transient mode (ECO = V_IN) and 240 mV in Low Power mode (ECO = GND), per the "Dropout Voltage" table in the datasheet. This enables reliable operation down to V_IN = 3.23 V while delivering full rated current.