onsemi NCV4254CPDSTR2G

Overview

NCV4254CPDSTR2G from onsemi is an automotive-grade low-dropout tracking voltage regulator in SOIC-8 EP (exposed pad) package, delivering up to 70 mA output current with ±3 mV tracking accuracy, 220 mV typical dropout at 70 mA, and AEC-Q100 Grade 1 qualification. It functions as a buffered, adjustable output stage that tracks an external reference voltage (VEN/REF), enabling precise off-module sensor power supply in harsh automotive environments.

For engineers reviewing the NCV4254CPDSTR2G datasheet, pinout, applications, or equivalent options, this device is selected for remote sensor biasing where input-to-output voltage tracking, reverse polarity protection, thermal shutdown, and ultra-low quiescent current (<1 µA in disable mode) are critical design requirements.

Technical Context

The NCV4254CPDSTR2G implements a PNP-based tracking architecture where the output voltage VOUT is actively regulated to match the voltage applied to the EN/REF pin - either directly or via resistor divider - with high DC precision and fast transient response. Its internal current limiting (71–150 mA), thermal shutdown (151–200 °C), and reverse input/output voltage protection operate independently of enable state.

This status-output variant integrates an open-collector ST pin that asserts low when VOUT deviates beyond ±50–120 mV of VEN/REF, with 10–33 µs reaction time across −40 °C to 150 °C junction temperature. The exposed-pad SOIC-8 EP package delivers 75 °C/W R_JA on 1 oz copper, enabling 1.67 W max dissipation at 25 °C ambient.

Key Specifications

Pinout & Package

NCV4254CPDSTR2G uses the SOIC-8 EP (Exposed Pad) package (Case 751AC), with thermal pad electrically and thermally connected to GND. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV4254CPDSTR2G, NCV4274CPDSTR2G extends current and input range while preserving pin compatibility and tracking fidelity, whereas TLV71718PDQNR omits core tracking and automotive features entirely - making it unsuitable for replacement in safety-compliant systems.

Availability

NCV4254CPDSTR2G is available at Aetrix Electronics and suitable for automotive cabin sensors, engine control peripherals, ADAS camera modules, and body control subsystems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for NCV4254CPDSTR2G 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, and IoT applications, with leadership in automotive power management and AEC-Q100-qualified components.

The NCV4254C product line delivers robust, low-dropout tracking regulators specifically engineered for automotive remote sensor powering - emphasizing precision tracking, fault reporting, and survivability in extreme temperature and transient environments.

FAQ

What is the function of the ST pin on the NCV4254CPDSTR2G?

The ST (Status) pin on the NCV4254CPDSTR2G is an open-collector output that pulls low when the regulated VOUT deviates more than ±50–120 mV from the EN/REF reference voltage. It provides real-time fault indication to a microcontroller, with 10–33 µs response time across temperature. NCV4254CPDSTR2G requires an external pull-up resistor (typically 10 kΩ) to VREF or VOUT to generate a valid logic-high signal during normal operation.

Does the NCV4254CPDSTR2G support reverse input voltage protection?

Yes, the NCV4254CPDSTR2G provides reverse input voltage protection down to −16 V, as verified in the Electrical Characteristics table (I_{in_rev} = −0.2 to −1 mA at VIN = −16 V). This eliminates the need for external reverse-polarity diodes in automotive battery-connected applications, reducing BOM count and forward voltage loss. NCV4254CPDSTR2G also blocks reverse current flow from VOUT to VIN under negative input conditions.

What is the maximum output current capability of the NCV4254CPDSTR2G?

The NCV4254CPDSTR2G delivers up to 70 mA of continuous output current under typical conditions (T_J = 25 °C, V_IN = 13.5 V, V_EN/REF = 5 V). Its current limit is specified from 71 mA (min) to 150 mA (max) depending on input voltage and temperature. At elevated input voltages (>26 V), the current limit decreases to maintain safe power dissipation - see Figure 7 in the datasheet for I_{OUT_MAX} vs. V_IN.

How does the NCV4254CPDSTR2G achieve its ±3 mV tracking accuracy?

The NCV4254CPDSTR2G achieves ±3 mV tracking accuracy through a precision internal error amplifier and PNP pass transistor architecture that compares VOUT directly against the voltage applied to the EN/REF pin. This specification is guaranteed over 4–45 V input, 0.1–60 mA load, and −40 °C to +150 °C junction temperature - confirmed in Table 7 of the datasheet under "Output Voltage Tracking Accuracy". NCV4254CPDSTR2G maintains this accuracy without external trimming or calibration.

Is the NCV4254CPDSTR2G pin-compatible with other variants in the NCV4254C family?

Yes, the NCV4254CPDSTR2G (ST version, SOIC-8 EP) shares identical pinout with NCV4254CPDAJR2G (ADJ version, SOIC-8 EP) and differs only in function of Pin 4 (ST vs. ADJ). It is not pin-compatible with SOIC-8 (non-EP) variants like NCV4254CDSTR2G due to different thermal pad layout and mechanical dimensions. NCV4254CPDSTR2G requires PCB footprint designed for Case 751AC, not Case 751.