onsemi NCV8502D25R2G

Overview

NCV8502D25R2G from onsemi is a 2.5 V fixed-output, 150 mA automotive-grade LDO linear regulator with ±2.0% output accuracy, 0.6 V max dropout at full load, 90 µA quiescent current, and integrated active RESET (with programmable delay), FLAG early-warning monitor, and fault protection including +60 V load dump tolerance. It serves as the primary power supply for microprocessor core logic in engine control units and body electronics.

For engineers reviewing the NCV8502D25R2G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, 1.0 V minimum RESET operation voltage, adjustable reset threshold via RADJ, MON input programmability, and SO-8 package compatibility with automotive thermal and EMC requirements.

Technical Context

The NCV8502D25R2G implements a bandgap-referenced error amplifier driving a PNP pass transistor, with independent comparator-based RESET and FLAG circuits referenced to internal 1.28 V precision reference. Its RESET function latches on dropout and releases only after regulation is re-established plus external DELAY capacitor timing.

FLAG monitoring operates via a dedicated comparator with 1.20 V typical trip point on the MON pin, configurable with external resistor divider; the open-collector FLAG output provides early warning before RESET assertion, enabling controlled microprocessor shutdown. All protection functions - reverse battery (−15 V), short-circuit, thermal overload, and 60 V load dump - are fully integrated and validated per automotive stress standards.

Key Specifications

Pinout & Package

NCV8502D25R2G uses the SO-8 narrow-body package (Case 751-07), 4.9 × 3.9 × 1.5 mm, Pb-free, with exposed pad not present (SO-8 NB, not SOW-16). Pin 1 is located at top-left corner with notch or bevel marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73325PDBVR and TPS7B6725QPWPRQ1, the NCV8502D25R2G uniquely combines AEC-Q100 qualification, dual supervision (RESET + FLAG), programmable thresholds, and full automotive transient protection in a standard SO-8 footprint - making it irreplaceable for safety-critical or feature-rich automotive domains.

Availability

NCV8502D25R2G is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera ECUs requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.

Supply support for NCV8502D25R2G 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, high-reliability components for automotive, industrial, and cloud power applications.

The NCV8502 series was designed specifically for automotive microprocessor power management, integrating supervision, protection, and precision regulation into a single AEC-Q100-qualified device to reduce system-level component count and improve functional safety compliance.

FAQ

What is the minimum input voltage required for NCV8502D25R2G to maintain regulation?

The NCV8502D25R2G requires VIN ≥ VOUT + dropout voltage. With a maximum dropout of 0.6 V at 150 mA, the minimum input is 3.1 V to sustain 2.5 V output at full load. At light loads (100 µA), dropout drops to 100 mV, allowing operation down to 2.6 V - critical for automotive cold-crank scenarios where battery voltage dips below 6 V.

Does NCV8502D25R2G require an external capacitor on the DELAY pin, and how is delay time calculated?

Yes, NCV8502D25R2G requires an external capacitor on the DELAY pin to set reset assertion timing. Delay time follows 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 - enabling firmware-controlled hold-off before hard reset.

Can the FLAG output of NCV8502D25R2G drive a microcontroller GPIO directly?

Yes, the FLAG output is an open-collector NPN stage rated for 1 mA sink current and 0.4 V saturation at that load. It can directly interface to 1.8 V, 3.3 V, or 5 V MCU GPIO pins using a pull-up resistor (e.g., 10 kΩ to VCC). The FLAG signal asserts low when MON voltage falls below threshold - providing deterministic early-warning without level-shifting.

Is NCV8502D25R2G pin-compatible with other devices in the NCV8502 family?

Yes, all SO-8 variants in the NCV8502 family - including NCV8502D33R2G, NCV8502D50R2G, and NCV8502DADJR2G - share identical pinout and footprint. Only the output voltage and internal resistor network differ; external circuitry (RADJ, DELAY, MON) remains fully interchangeable across fixed- and adjustable-output versions.

What thermal derating applies to NCV8502D25R2G in SO-8 package at 150 mA load?

In SO-8 (R_JA = 165°C/W), dissipating 150 mA at 3.1 V input (0.6 V dropout) yields 90 mW power loss. At 25°C ambient, junction temperature rise is 14.9°C - well within the −40°C to +150°C operating range. Derating begins above 105°C ambient; full 150 mA output is guaranteed up to +125°C case temperature per AEC-Q100 Grade 1 specification.