onsemi NCP4586DMU15TCG

Overview

NCP4586DMU15TCG from onsemi is a CMOS low-dropout linear regulator delivering 150 mA output with 1.5 V fixed output voltage, 320 mV typical dropout at full load, ±1% output accuracy (VOUT > 2 V), and 80 dB PSRR at 1 kHz - deployed in battery-powered portable electronics requiring stable, low-noise power for analog sensors and RF front-ends.

For engineers reviewing the NCP4586DMU15TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its UDFN4 1.0×1.0 mm package, enable-active-high logic, auto-discharge capability, and compatibility with 0.47 µF ceramic output capacitors without external compensation.

Technical Context

The NCP4586DMU15TCG implements a CMOS pass transistor architecture with internal voltage reference, error amplifier, and current-foldback protection. Its enable input is active-high (CE = high enables regulation), and the D-version includes an integrated N-channel discharge transistor between VOUT and GND for rapid output capacitor discharge during shutdown.

It operates across 1.7–6.5 V input range with thermal shutdown and junction temperature monitoring up to +150°C. The device achieves stable regulation with only 0.47 µF ceramic output capacitance and maintains ±1% output accuracy over −40°C to +85°C ambient, with line regulation of 0.02–0.10 %/V and load regulation of 10–30 mV from 1 mA to 150 mA.

Key Specifications

Pinout & Package

Package: UDFN4 (1.0 mm × 1.0 mm, 0.65 mm pitch, exposed thermal pad), Pb-free, RoHS-compliant - optimized for high-density PCB layouts and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1502E/TT and XC6219B152MR-G, the NCP4586DMU15TCG uniquely combines active-high enable, integrated auto-discharge, and UDFN4 footprint - enabling simpler sequencing, faster power-down, and smaller layout in space-constrained portable designs.

Availability

NCP4586DMU15TCG is available at Aetrix Electronics and suitable for battery-powered equipment, portable communication devices, and wearable biometric monitors requiring stable component supply with long-term manufacturability and RoHS compliance.

Supply support for NCP4586DMU15TCG 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, and sensor solutions for automotive, industrial, and portable electronics.

The NCP4586DMU15TCG belongs to the NCP4586 family of low-noise, low-dropout regulators designed specifically for noise-sensitive, battery-constrained applications where small size, fast transient response, and controlled shutdown behavior are critical.

FAQ

What is the exact output voltage tolerance of the NCP4586DMU15TCG over temperature?

The NCP4586DMU15TCG delivers ±1% output voltage accuracy for VOUT > 2 V at TJ = 25°C. For the 1.5 V version, datasheet Table 4 specifies ±20 mV over −40°C to +85°C ambient, translating to ±1.33% full-scale error. This is confirmed in Electrical Characteristics section, row "Output Voltage" under "VOUT ≤ 2 V" and "−40°C ≤ TA ≤ 85°C" conditions. The NCP4586DMU15TCG maintains this tolerance without external trimming.

Does the NCP4586DMU15TCG require an external capacitor on the CE pin for noise immunity?

No, the NCP4586DMU15TCG does not require an external capacitor on the CE pin. Its enable input has built-in hysteresis and is specified to operate reliably with slow-rising/falling edges (t_R/t_F up to 10 µs). The CE pin threshold is V_CEH = 1.0 V min, with internal pull-down current of 0.4 µA (H/D versions), making it robust against typical PCB-level noise. No external filtering is needed for standard digital GPIO interfacing with the NCP4586DMU15TCG.

Can the NCP4586DMU15TCG be used with a 1 µF ceramic output capacitor instead of the recommended 0.47 µF?

Yes - the NCP4586DMU15TCG is stable with output capacitances ≥0.47 µF, including 1 µF ceramic capacitors. Larger values improve load transient response and reduce output ripple further, with no risk of oscillation. The device's internal compensation is optimized for 0.47–10 µF ceramic capacitors with ESR < 100 mΩ. Using 1 µF enhances immunity to sudden current steps in applications like sensor burst-read cycles, and remains fully compatible with the NCP4586DMU15TCG's design envelope.

What is the maximum allowable input voltage for the NCP4586DMU15TCG, and what happens above that limit?

The absolute maximum input voltage for the NCP4586DMU15TCG is 7 V, per Absolute Maximum Ratings table. Operation above 7 V risks permanent damage due to junction breakdown or oxide rupture. At VIN = 6.5 V (maximum recommended), the device delivers full 150 mA output with acceptable thermal rise. Exceeding 7 V - even momentarily - violates safe operating area limits and may cause immediate failure. System designers must ensure input transient clamping (e.g., TVS diode) or upstream regulation to keep VIN ≤ 7 V for reliable NCP4586DMU15TCG operation.

How does the auto-discharge function behave during shutdown of the NCP4586DMU15TCG?

When the CE pin is driven low, the NCP4586DMU15TCG disables regulation and activates its internal N-channel discharge transistor between VOUT and GND. This path sinks current from the output capacitor, discharging VOUT to <0.1 V within ~100 µs (typical) for a 1 µF load. Discharge current is limited to ~40 mA (short-circuit current), preventing excessive stress. This behavior is exclusive to D-versions like the NCP4586DMU15TCG and eliminates need for external bleed resistors - critical for low-power sequencing in multi-rail systems.