onsemi NCV8501DADJR2G

Overview

NCV8501DADJR2G 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 90 µA quiescent current at 100 µA load. It integrates ENABLE, active RESET (functional down to 1.0 V), FLAG early-warning monitor, and DELAY timing control - designed for battery-powered microprocessor systems requiring robust fault protection and power sequencing in harsh environments.

For engineers reviewing the NCV8501DADJR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its SOIC-8 NB (Case 751-07) package, adjustable output via external resistor divider, 60 V peak transient tolerance, −15 V reverse voltage rating, and automotive-qualified monitoring features enabling safe microprocessor shutdown coordination.

Technical Context

The NCV8501DADJR2G implements a bandgap-referenced error amplifier with unity-gain feedback through the VADJ pin, supporting user-configurable output voltages ≥1.25 V. Its RESET circuit operates independently of regulation status and remains valid down to VOUT = 1.0 V, while the FLAG comparator provides programmable early warning via the MON pin with 1.20 V typical threshold and 20–100 mV hysteresis.

ENABLE logic includes internal pull-down and overvoltage-tolerant input structure (up to 11 V), allowing direct connection to battery rails with optional series resistor. The DELAY pin sources 1.5–3.5 µA to charge an external capacitor, generating a programmable reset delay time governed by t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE.

Key Specifications

Pinout & Package

NCV8501DADJR2G uses the SOIC-8 NB (Case 751-07) surface-mount package: 4.9 mm × 3.9 mm body, 1.75 mm max height, 1.27 mm lead pitch, Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70733PDQNR and TPS7B6750QPWPRQ1, the NCV8501DADJR2G uniquely combines adjustable output, automotive-grade fault protection, and coordinated RESET/FLAG/DELAY functions in a single SOIC-8 device - making it optimal for safety-aware microprocessor power domains where deterministic shutdown sequencing is mandatory.

Availability

NCV8501DADJR2G is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, telematics gateways, and infotainment subsystems requiring stable component supply with long-term lifecycle assurance.

Supply support for NCV8501DADJR2G 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 for automotive, industrial, cloud, medical, and IoT applications.

The NCV8501DADJR2G belongs to onsemi's NCV8501 series of automotive-qualified micropower LDOs, engineered specifically for microprocessor power management in vehicles - emphasizing fault resilience, precise reset timing, and extended temperature operation (−40 °C to +150 °C).

FAQ

What output voltage range does the NCV8501DADJR2G support?

The NCV8501DADJR2G supports user-adjustable output voltages from 1.25 V to 16 V, set via an external resistor divider connected between VOUT and the VADJ pin. The internal reference is 1.28 V typical, so VOUT = 1.28 V × (1 + R1/R2). This flexibility allows one part number to replace multiple fixed-output regulators in diverse automotive subsystems.

How does the FLAG function work in the NCV8501DADJR2G?

The FLAG pin in the NCV8501DADJR2G is an open-collector output driven low when the MON pin voltage falls below its 1.20 V threshold (with 20–100 mV hysteresis). MON is typically connected to a resistor divider from VOUT, allowing programmable early-warning detection. This gives the microprocessor time to complete critical tasks before the subsequent RESET signal asserts.

Can the NCV8501DADJR2G operate with a 5 V input supplying a 3.3 V output?

Yes - the NCV8501DADJR2G can regulate 3.3 V from a 5 V input. With a typical dropout of 400 mV at 150 mA, it maintains regulation as long as VIN ≥ VOUT + 0.6 V. At light loads, dropout drops to 100 mV, enabling efficient operation even with small input–output differentials in low-power modes.

What is the purpose of the DELAY pin on the NCV8501DADJR2G?

The DELAY pin on the NCV8501DADJR2G sources a constant 1.5–3.5 µA current to charge an external capacitor, generating a programmable delay before RESET deasserts after power-up or recovery from brownout. Delay time follows t_DELAY = C_DELAY × (V_DT − V_{RESET_LOW}) / I_CHARGE, enabling precise reset timing without external timers.

Is the NCV8501DADJR2G qualified for automotive applications?

Yes - the NCV8501DADJR2G carries the "NCV" prefix, indicating qualification to AEC-Q100 Grade 1 (−40 °C to +125 °C ambient, −40 °C to +150 °C junction) and compliance with automotive stress testing, including ISO 7637-2 load dump (60 V), reverse battery (−15 V), and EMC robustness requirements.