onsemi NCV8501PDW80R2G

Overview

NCV8501PDW80R2G from onsemi is an automotive-grade 8.0 V fixed-output LDO linear regulator in a 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 under light load - designed for battery-powered microprocessor systems requiring RESET, ENABLE, FLAG monitor, and robust fault protection.

For engineers reviewing the NCV8501PDW80R2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 8.0 V output stability over −40 °C to +150 °C, early-warning FLAG functionality tied to MON input, programmable RESET delay via external capacitor, and automotive-qualified transient tolerance (±15 V reverse, +60 V load dump).

Technical Context

The NCV8501PDW80R2G integrates a precision bandgap reference, error amplifier, and independent low-voltage detection circuitry enabling RESET assertion down to VOUT = 1.0 V. Its FLAG comparator monitors the MON pin with 1.20 V typical threshold and 20–100 mV hysteresis, while ENABLE supports direct battery connection with internal pull-down and 2.55 V typical activation threshold.

RESET timing is controlled by an internal current source (2.5 µA typ) charging an external DELAY capacitor; delay time follows t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE. The device features thermal shutdown at 150 °C, short-circuit current limiting (151–300 mA), and reverse-battery protection up to −15 V.

Key Specifications

Pinout & Package

SOW-16 exposed pad (Case 751AG) with thermal pad for enhanced heat dissipation; 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 performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8501D80R2G, the NCV8501PDW80R2G delivers 3× better thermal performance for sustained 150 mA loads in hot environments, while TLV70780PDRVR offers lower quiescent current but omits essential automotive safety features and requires additional components for system-level monitoring.

Availability

NCV8501PDW80R2G 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 NCV8501PDW80R2G 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 focused on energy-efficient electronics, with leadership in automotive, industrial, cloud, and IoT markets.

The NCV8501 series was developed specifically for automotive microprocessor power management, integrating RESET, FLAG, ENABLE, and robust fault protection into a single LDO to reduce system component count and improve functional safety compliance.

FAQ

What is the maximum input voltage the NCV8501PDW80R2G can withstand during load dump events?

The NCV8501PDW80R2G is rated for +60 V peak transient voltage during load dump events at VIN, as specified in the Maximum Ratings table. This capability is achieved through internal clamping circuitry and allows direct connection to 12 V automotive battery rails without external TVS diodes in most cases. The device maintains regulation and functional integrity throughout the transient, supporting ASIL-B system designs.

Does the NCV8501PDW80R2G require an external capacitor on the DELAY pin, and how is delay time calculated?

Yes, the NCV8501PDW80R2G requires an external capacitor on the DELAY pin to set RESET assertion delay. Delay time follows 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). For example, a 33 nF capacitor yields ~24 ms delay. The capacitor must be placed close to the DELAY pin with low-ESR characteristics.

Can the FLAG output of the NCV8501PDW80R2G drive a microcontroller GPIO directly?

Yes, the FLAG output of the NCV8501PDW80R2G is an open-collector NPN transistor capable of sinking ≥1 mA at 0.4 V saturation. It can directly interface with standard 3.3 V or 5 V MCU GPIOs using a pull-up resistor (e.g., 10 kΩ to VCC). The FLAG signal goes low when the MON pin voltage falls below the 1.20 V threshold, providing early warning before RESET activation.

What is the minimum output voltage at which the RESET function remains valid for the NCV8501PDW80R2G?

The RESET function of the NCV8501PDW80R2G remains valid down to VOUT = 1.0 V, as confirmed in the datasheet's "RESET Function" section. This ensures reliable reset signaling even during deep brownout conditions, such as automotive battery sag during cranking. The RESET output is functionally independent of the main regulator loop, guaranteeing deterministic behavior below normal regulation range.

How does the ENABLE pin of the NCV8501PDW80R2G behave when left floating?

When left floating, the ENABLE pin of the NCV8501PDW80R2G is internally pulled down, placing the device in low-IQ sleep mode (≤30 µA). However, the datasheet explicitly recommends against relying on this for normal operation - an external pulldown resistor or active control is required to ensure predictable startup and fail-safe behavior. Floating ENABLE may cause erratic enable/disable cycling in noisy environments.