onsemi NCV8502PDW33G

Overview

NCV8502PDW33G from onsemi is a 3.3 V, ±2.0% accuracy, 150 mA automotive-grade LDO linear regulator in SOIC-16 wide-body exposed-pad package. It features active RESET with programmable delay, early-warning FLAG monitor, and fault protection including −15 V reverse voltage, +60 V load dump transient tolerance, short-circuit and thermal overload. It powers microprocessor subsystems in engine control units and body electronics.

For engineers reviewing the NCV8502PDW33G datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.0 V minimum functional RESET voltage, 90 µA quiescent current at 100 µA load, adjustable reset threshold via RADJ, FLAG hysteresis of 20–100 mV, and AEC-Q100 qualification for under-hood use.

Technical Context

The NCV8502PDW33G integrates a precision bandgap reference, error amplifier, current-limit sense, thermal shutdown circuitry, and independent RESET/FLAG comparators. Its RESET function remains valid down to VOUT = 1.0 V, and the FLAG comparator uses an internal 1.20 V reference with external MON pin programmability.

It implements a latched DELAY timer charged by a 1.5–3.5 µA current source, discharging only when regulation is violated. The RADJ input allows reset threshold reduction below default (e.g., 3.036 V low threshold for 3.3 V output), while VADJ is unused in fixed-output variants like NCV8502PDW33G.

Key Specifications

Pinout & Package

NCV8502PDW33G uses the SOIC-16 wide-body exposed-pad package (Case 751AG), with thermal resistance R_JA = 56°C/W and R_JC = 15°C/W. The exposed pad must be soldered to PCB ground plane for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73333PDBVR and TPS7B6733QPWPRQ1, the NCV8502PDW33G uniquely combines FLAG early warning, RADJ-adjustable reset, and −15 V reverse-battery tolerance - making it the only option qualified for full ISO 7637-2 compliance in safety-critical automotive domains.

Availability

NCV8502PDW33G is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and transmission control units requiring stable component supply under AEC-Q100 and PPAP-compliant sourcing.

Supply support for NCV8502PDW33G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCV8502 series belongs to onsemi's automotive power management portfolio, designed specifically for robust, fail-safe voltage regulation in engine, chassis, and ADAS systems operating under extreme electrical stress.

FAQ

What is the minimum input voltage required for NCV8502PDW33G to maintain regulation?

The NCV8502PDW33G requires VIN ≥ VOUT + dropout voltage. With a maximum dropout of 600 mV at 150 mA, it maintains 3.3 V regulation down to VIN = 3.9 V. At lighter loads, dropout drops to 100 mV, allowing regulation from 3.4 V - critical for cold-crank operation in 12 V automotive systems. The device remains functional (though not regulating) down to VIN = −15 V.

Does NCV8502PDW33G require an external capacitor on the RADJ pin?

No, the RADJ pin on NCV8502PDW33G is an input - not an output - and requires an external resistor divider between VOUT and GND to lower the reset threshold. A typical configuration uses two resistors (e.g., 10 kΩ from VOUT to RADJ, 2.2 kΩ from RADJ to GND) to set VRH ≈ 2.7 V. Leaving RADJ unconnected defaults to the standard 3.00 V high threshold.

Can the FLAG output of NCV8502PDW33G drive a microcontroller GPIO directly?

Yes, the FLAG pin is an open-collector output rated for 1.0 mA sink current with saturation voltage ≤0.4 V at that load. It interfaces directly with 3.3 V or 5 V MCU GPIOs configured as pull-up inputs. No level-shifter is needed, and the 20–100 mV hysteresis prevents chatter during slow VOUT transitions.

How is thermal performance affected by the exposed pad on NCV8502PDW33G?

The exposed pad on NCV8502PDW33G is electrically connected to GND and thermally critical: soldering it to a ≥400 mm² copper pour reduces R_JA from 56°C/W to ~40°C/W. Without pad connection, junction temperature rise exceeds limits at >100 mA load in 85°C ambient. Thermal design must allocate ≥6 thermal vias (0.3 mm diameter) under the pad.

Is NCV8502PDW33G pin-compatible with other devices in the NCV8502 family?

Yes, all NCV8502 PDW-suffix variants (e.g., NCV8502PDW50G, NCV8502PDW25G) share identical SOIC-16 exposed-pad pinout and footprint. Only the output voltage and associated internal feedback network differ - enabling drop-in replacement across 2.5 V, 3.3 V, 5.0 V, 8.0 V, and 10 V versions without PCB changes.