onsemi NCV8502PDWADJG

Overview

NCV8502PDWADJG from onsemi is an automotive-grade adjustable-output LDO linear regulator delivering 150 mA with ±2.0% output accuracy, 0.6 V max dropout at full load, and integrated active RESET with programmable delay and early-warning FLAG monitor. It operates from −15 V to +48 V input, withstands +60 V load dump transients, and supports battery-powered microprocessor systems requiring robust power sequencing and fault signaling.

For engineers reviewing the NCV8502PDWADJG datasheet, pinout, applications, or equivalent options, key selection criteria include its 150 mA output capability, adjustable output voltage (1.25–16 V), 90 µA quiescent current at light load, AEC-Q100 qualification, and SOW-16 exposed-pad thermal performance for automotive under-hood environments.

Technical Context

The NCV8502PDWADJG implements a bandgap-referenced error amplifier with unity-gain feedback via the VADJ pin, enabling precise output adjustment from 1.25 V to 16 V using an external resistor divider. Its RESET circuit remains functional down to VOUT = 1.0 V and features hysteresis (0.97×/0.98× VOUT) to prevent oscillation during brownout conditions.

It integrates three independent monitoring functions: FLAG (open-collector comparator with 1.20 V typical MON threshold and 20–100 mV hysteresis), DELAY (current-source-based timing capacitor charging/discharging), and RADJ-adjustable reset threshold (1.23–1.39 V reference). All protection circuits - reverse-battery (−15 V), short-circuit, and thermal shutdown (150–180 °C) - are fully specified for automotive operation.

Key Specifications

Pinout & Package

SOW-16 wide-body SOIC package with exposed thermal pad (Case 751AG), optimized for low R_JA = 56 °C/W and high-power dissipation in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8502DADJR2G and TLV73312PDRVR, the NCV8502PDWADJG uniquely combines AEC-Q100 qualification, integrated supervision (RESET/FLAG/DELAY), and SOW-16 thermal performance - making it the only drop-in solution for automotive ECU power rails requiring both robustness and intelligent sequencing.

Availability

NCV8502PDWADJG is available at Aetrix Electronics and suitable for automotive engine control units, ADAS sensor modules, and body control modules requiring stable component supply across extended temperature ranges and harsh electrical environments.

Supply support for NCV8502PDWADJG 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 automotive electronics with broad manufacturing and quality certifications.

The NCV8502PDWADJG belongs to onsemi's NCV8502 series of automotive LDO regulators, designed specifically for power-supply supervision in engine control, chassis, and safety-critical vehicle systems requiring AEC-Q100 compliance and robust transient handling.

FAQ

What is the minimum input voltage required for NCV8502PDWADJG to regulate a 5.0 V output?

The NCV8502PDWADJG requires VIN ≥ 5.6 V to maintain regulation at 5.0 V output, based on its maximum 600 mV dropout voltage at 150 mA. For reliable startup and margin, design with VIN ≥ 6.0 V. The device remains functional down to VIN = −15 V but will not regulate below the dropout threshold.

How do I configure the output voltage of NCV8502PDWADJG for 3.3 V operation?

To set NCV8502PDWADJG to 3.3 V, connect a resistor divider from VOUT to VADJ such that VADJ = 1.28 V. For example, use R1 = 15.8 kΩ from VOUT to VADJ and R2 = 10.0 kΩ from VADJ to GND. This yields VOUT = 1.28 V × (1 + 15.8k/10.0k) ≈ 3.30 V. Confirm with layout parasitics and tolerance stack-up.

Does NCV8502PDWADJG require an external capacitor on the DELAY pin, and what value is recommended?

Yes, NCV8502PDWADJG requires an external capacitor on the DELAY pin to set RESET delay time. A 33 nF ceramic capacitor yields ~23.8 ms typical delay (t_DELAY = C_DELAY × 1.8 V / 2.5 µA). Use X7R/C0G dielectric with 16 V rating; place close to DELAY pin with short traces to minimize noise coupling.

Can NCV8502PDWADJG be used in non-automotive applications such as industrial IoT gateways?

Yes, NCV8502PDWADJG is suitable for industrial IoT gateways requiring high reliability, wide input range (−15 V to +48 V), and intelligent power supervision. Its AEC-Q100 qualification, 90 µA quiescent current, and FLAG/RESET functions provide robustness beyond standard commercial LDOs - though cost and thermal design should be evaluated against alternatives like the NCP1117.

What is the purpose of the MON pin on NCV8502PDWADJG, and how is it typically connected?

The MON pin on NCV8502PDWADJG serves as the input to the early-warning comparator that drives the FLAG output. It is typically connected to a resistor divider from VOUT to set the FLAG trip point (e.g., 1.20 V). If unused, MON must be tied directly to VOUT per datasheet to disable the comparator and prevent floating input errors.