onsemi NCV8501PDW25G

Overview

NCV8501PDW25G from onsemi is a 2.5 V fixed-output automotive-grade LDO linear regulator in SOW-16 exposed pad package, delivering 150 mA output current with ±2.0% accuracy, 0.6 V max dropout at full load, and 90 µA quiescent current at 100 µA load. It integrates ENABLE, active RESET (functional down to 1.0 V), DELAY timing control, and FLAG early-warning monitor for microprocessor power management in battery-powered automotive ECUs.

For engineers reviewing the NCV8501PDW25G datasheet, pinout, applications, or equivalent options, key selection considerations include its −15 V reverse voltage tolerance, +60 V peak transient immunity, thermal/short-circuit protection, FLAG/MON comparator threshold (1.20 V typ), and SOW-16 exposed-pad thermal performance (R_JA = 56 °C/W).

Technical Context

The NCV8501PDW25G implements a bandgap-referenced error amplifier with current-limit and thermal shutdown circuitry, supporting precise regulation across −40 °C to +150 °C junction temperature. Its RESET function uses hysteresis (0.97×V_OUT/0.98×V_OUT) and remains valid down to V_OUT = 1.0 V, while the FLAG comparator monitors V_MON with 20–100 mV hysteresis and 0.1–0.4 V saturation voltage at 1 mA sink.

ENABLE logic includes internal pull-down and overvoltage protection up to 11 V; input threshold is ~2.55 V at +20 °C and up to 3.0 V at −40 °C. The DELAY pin sources 1.5–3.5 µA to program reset delay time via external capacitor, discharging fully upon regulation violation to ensure latched behavior.

Key Specifications

Pinout & Package

SOW-16 exposed pad (Case 751AG) with thermal pad for enhanced heat dissipation; R_JC = 15 °C/W, R_JA = 56 °C/W, R_JP = 35 °C/W (to pin 16). Pin 16 is GND; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73325PDBVR and TPS7B6725QPWPRQ1, the NCV8501PDW25G uniquely combines automotive qualification, integrated FLAG/RESET/ENABLE/DELAY, and superior thermal performance in a single SOW-16 exposed-pad package-enabling simplified, robust power sequencing in safety-critical ECUs without external components.

Availability

NCV8501PDW25G is available at Aetrix Electronics and suitable for automotive body electronics, instrument clusters, and telematics systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for NCV8501PDW25G 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV8501PDW25G belongs to the NCV8501 series of micropower LDO regulators designed specifically for automotive microprocessor power management, featuring integrated supervision functions and robust transient protection to meet stringent ISO 7637-2 and AEC-Q100 requirements.

FAQ

What is the minimum input voltage required for NCV8501PDW25G to maintain 2.5 V regulation at 150 mA?

The NCV8501PDW25G requires VIN ≥ 3.1 V to sustain 2.5 V output at 150 mA load, based on its maximum 600 mV dropout voltage. Below this, output drops linearly with input; regulation resumes once VIN exceeds VOUT + dropout. At lighter loads, dropout decreases-e.g., 150 mV at 1 mA-allowing operation down to ~2.65 V.

How does the FLAG function of NCV8501PDW25G differ from the RESET function?

The FLAG pin on the NCV8501PDW25G provides an early-warning open-collector signal when the MON input falls below ~1.20 V, giving the microprocessor time to complete critical operations before RESET asserts. RESET is an active-low signal triggered when VOUT drops below 2.25–2.35 V (with hysteresis) and remains valid down to VOUT = 1.0 V-ensuring reliable shutdown even during deep brown-out.

Can the NCV8501PDW25G be used in non-automotive applications?

Yes, the NCV8501PDW25G is suitable for industrial and medical applications requiring high reliability, wide temperature operation (−40 °C to +150 °C), and robust fault protection. Its −15 V reverse voltage tolerance, +60 V transient immunity, and 2.5 V ±2.0% accuracy provide design margin beyond typical commercial-grade LDOs, though the NCV prefix reflects automotive qualification-not restriction.

What is the recommended external capacitor for the DELAY pin on NCV8501PDW25G?

A 33 nF ceramic capacitor is recommended for the DELAY pin of the NCV8501PDW25G to achieve ~23.8 ms reset delay, calculated using t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE, where V_DT = 1.8 V (typ), V_{RESET_LOW} ≈ 0 V, and I_CHARGE = 2.5 µA (typ). Larger capacitors increase delay linearly; ensure capacitor voltage rating exceeds 10 V.

Does the NCV8501PDW25G require an output capacitor, and what type is recommended?

Yes, the NCV8501PDW25G requires a minimum 10 µF output capacitor for stability, as specified in Figure 20 of the datasheet. A low-ESR ceramic or tantalum capacitor rated for ≥6.3 V is recommended; aluminum electrolytic types may cause instability due to higher ESR. Capacitor value and ESR directly impact start-up time, load transient response, and loop stability.