onsemi NCV8502PDW80G

Overview

NCV8502PDW80G from onsemi is an automotive-grade 8.0 V fixed-output LDO linear regulator with 150 mA output current, ±2.0% output accuracy, 0.6 V max dropout at full load, and integrated active RESET (functional down to 1.0 V), FLAG monitor, and DELAY timing-designed for battery-powered microprocessor systems in harsh automotive environments.

For engineers reviewing the NCV8502PDW80G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, 60 V peak transient tolerance, −15 V reverse voltage protection, adjustable reset threshold via RADJ, and SOW-16 exposed-pad thermal performance for under-hood power management.

Technical Context

The NCV8502PDW80G implements a bandgap-referenced error amplifier with current-limit and thermal shutdown protection, supporting stable regulation across −40°C to +150°C junction temperature. Its RESET circuit operates independently of the main regulator, ensuring valid reset assertion even when VOUT drops to 1.0 V.

The FLAG monitor uses an internal comparator referenced to 1.20 V (±0.11 V hysteresis) on the MON pin, enabling early warning before RESET activation; the DELAY pin sources 2.5 µA typical to charge an external capacitor, setting programmable reset delay time per t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE.

Key Specifications

Pinout & Package

SOW-16 wide-body SOIC package with exposed thermal pad (Case 751AG), optimized for high-power dissipation in automotive PCBs. Thermal resistance: R_JA = 56°C/W, R_JC = 15°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8502D80R2G and TLV73380PDBVR, the NCV8502PDW80G uniquely combines AEC-Q100 qualification, integrated power-good monitoring, and exposed-pad thermal performance-making it the sole choice for thermally demanding automotive modules requiring single-chip reset supervision and robustness.

Availability

NCV8502PDW80G 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 traceable sourcing for Tier 1 OEM programs.

Supply support for NCV8502PDW80G 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV8502PDW80G belongs to onsemi's automotive-qualified LDO family designed specifically for microprocessor power management in harsh environments-emphasizing fault resilience, extended temperature operation, and integrated system-level supervision.

FAQ

What is the maximum input voltage the NCV8502PDW80G can withstand during load dump events?

The NCV8502PDW80G is rated for +60 V peak transient voltage during load dump events at VIN, per ISO 7637-2 Pulse 5a/b. This rating applies with VIN = 14 V nominal and is guaranteed by design-enabling direct connection to automotive battery rails without external TVS clamping in most implementations. The NCV8502PDW80G maintains functionality throughout the transient and resumes regulation once voltage returns within operating range.

Does the NCV8502PDW80G require an external capacitor on the DELAY pin, and how is delay time calculated?

Yes, the NCV8502PDW80G requires an external capacitor connected between DELAY pin and GND to set reset delay time. Delay is calculated as t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE, where V_DT = 1.8 V typical, V_{RESET_LOW} ≈ 0 V, and I_CHARGE = 2.5 µA typical. For example, a 33 nF capacitor yields ~23.8 ms delay. The NCV8502PDW80G's DELAY pin actively charges this capacitor during power-up and post-reset recovery.

Can the RESET threshold of the NCV8502PDW80G be adjusted, and how is it implemented?

Yes, the RESET threshold of the NCV8502PDW80G can be lowered using an external resistor divider connected between VOUT and RADJ. The internal reset comparator references VR(ADJ) = 1.23–1.39 V; selecting R1/R2 values sets the new threshold as V_TH = V_REF × (1 + R1/R2). Grounding RADJ selects the default 7.00 V threshold for the 8.0 V output version. This adjustment is fully supported in the NCV8502PDW80G's fixed-output configuration.

What is the purpose of the MON and FLAG pins on the NCV8502PDW80G, and how are they used together?

The MON pin is the input to an on-chip comparator with 1.20 V threshold and 20–100 mV hysteresis; the FLAG pin is its open-collector output. When VOUT sags and MON voltage (typically tied to VOUT via resistor divider) crosses 1.20 V, FLAG pulls low-providing early warning to the MCU before RESET activates. This allows the NCV8502PDW80G to enable controlled software shutdown, saving state or flushing buffers. FLAG remains asserted until MON rises above 1.31 V.

Is the NCV8502PDW80G pin-compatible with other members of the NCV8502 family, such as the adjustable-output variants?

No, the NCV8502PDW80G is not pin-compatible with adjustable-output versions like NCV8502PDWADJG. Fixed-output variants use pins 3–6 and 11–12 as NC, while adjustable versions assign those pins to VADJ feedback and additional NC roles. The RADJ, DELAY, RESET, FLAG, MON, and VOUT assignments differ between fixed and adjustable configurations-even within the same SOW-16 package-requiring separate PCB layouts for each variant. The NCV8502PDW80G's pinout is defined exclusively for fixed 8.0 V operation.