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onsemi NCV4254CPDAJR2G
- Part No.:
- NCV4254CPDAJR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV4254CPDAJR2G.pdf
- Description:
- IC REG LINEAR POS ADJ 70MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
NCV4254CPDAJR2G from onsemi is an automotive-grade adjustable low-dropout tracking voltage regulator in SOIC-8 EP package, delivering up to 70 mA output current with ±3 mV tracking accuracy (typ. 220 mV dropout at 70 mA), wide 4–45 V input range, and AEC-Q100 Grade 1 qualification. It functions as a buffered reference tracker for remote sensor power supplies in vehicle ECUs.
For engineers reviewing the NCV4254CPDAJR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its adjustable tracking capability, reverse-input protection, thermal shutdown behavior, and compatibility with off-module sensor loads requiring precise voltage replication.
Technical Context
The NCV4254CPDAJR2G implements a PNP-based tracking architecture where the output voltage VOUT is actively regulated to match the voltage applied at the EN/REF pin-either directly or via external resistor divider-enabling configurations where VOUT equals, exceeds, or falls below VEN/REF. Its internal biasing supports operation down to −20 V input and includes saturation protection during reverse-bias conditions.
It integrates three core protection mechanisms: current limiting (71–150 mA), thermal shutdown (151–200 °C), and reverse-input/reverse-bias voltage tolerance. The ADJ version uses Pin 4 as high-impedance adjust input (IADJ ≤ 0.5 µA), enabling high-side driver mode when grounded, distinct from the ST version's open-collector status output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 70 mA continuous; sufficient for powering multiple automotive sensors without external boost stages. |
| Tracking Accuracy | ±3 mV over 5.7–26 V input and 0.1–60 mA load; ensures tight regulation of downstream analog sensor references. |
| Dropout Voltage | Typ. 220 mV at 70 mA; enables stable operation even during cold-crank (≥6 V battery) with minimal headroom loss. |
| Input Voltage Range | 4–45 V DC; covers full automotive battery range including load dump transients (ISO 16750-2 Class B). |
| Quiescent Current | ≤65 µA at light load; critical for always-on modules where standby power budget is constrained. |
| Junction Temp Range | −40 °C to +150 °C; validated for under-hood placement in engine control units and body controllers. |
| AEC-Q100 Grade | Grade 1 qualified; meets automotive reliability requirements for temperature cycling, HTOL, and ESD (±4 kV HBM). |
Pinout & Package
NCV4254CPDAJR2G is housed in a thermally enhanced SOIC-8 EP (Exposed Pad) package (Case 751AC), with the exposed pad electrically connected to GND for improved thermal dissipation and EMI performance. PCB layout must connect the pad to a large copper pour for RJA = 75 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output | Tracker output node; requires ≥2.2 µF ceramic capacitor (ESR < 5 Ω) directly to GND for stability. |
| 2,3,6,7 (GND) | Power ground | Four dedicated GND pins minimize ground bounce; all must be connected to system ground plane. |
| 4 (ADJ) | Adjust input | High-impedance op-amp inverting input; configures output voltage via resistor divider or grounds for high-side driver mode. |
| 5 (EN/REF) | Enable / Reference | Dual-function pin: logic enable (VTH = 0.4 V low, 1.75 V high) and tracking reference source (2–40 V range). |
| 8 (VIN) | Input supply | Primary power input; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin. |
| Pad (EP) | Thermal & electrical GND | Exposed thermal pad; must be soldered to PCB GND plane to maintain junction temp ≤150 °C at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout tracking | 220 mV typical at 70 mA enables operation during battery brownouts while maintaining sensor reference integrity. |
| Reverse polarity protection | Withstands −16 V input and −32 V output reverse bias without damage or latch-up-critical for service disconnect scenarios. |
| Automotive qualification | AEC-Q100 Grade 1 and PPAP-capable; qualified for use in safety-relevant systems per ISO 26262 functional safety analysis support. |
| Integrated protections | Current limit (71–150 mA), thermal shutdown (151–200 °C), and reverse-current blocking eliminate need for external protection circuitry. |
| Adjustable tracking ratio | VOUT can be set equal to, higher than, or lower than VEN/REF using external resistors-enabling flexible sensor biasing schemes. |
Applications
| Engine Coolant Temperature Sensor Power | Front Radar Module Bias Supply |
|---|---|
|
Use Scenario: Provides stable, tracked bias voltage to analog NTC thermistor circuits in engine bay environments subject to wide temperature swings and battery transients. IC Role / Device Role / Timing Role: Adjustable tracking regulator replicating a master reference voltage while isolating sensor circuitry from main ECU rail noise and ripple. Use Value: ±3 mV tracking accuracy ensures <0.1% error in resistance-to-temperature conversion across −40 °C to +150 °C ambient. |
Use Scenario: Supplies clean, regulated voltage to millimeter-wave radar ICs requiring precise analog front-end biasing in ADAS forward-sensing modules. IC Role / Device Role / Timing Role: Low-noise tracking regulator referenced to a high-stability LDO output, rejecting supply ripple above 60 dB (100 Hz). Use Value: 60 dB PSRR and 220 mV dropout allow direct connection to 12 V battery rail without intermediate filtering or buck conversion. |
| Body Control Module Door Lock Actuator Driver | Off-Board Camera Module Reference |
|
Use Scenario: Powers solenoid drivers and Hall-effect position sensors in door latch assemblies where space-constrained PCBs require integrated regulation. IC Role / Device Role / Timing Role: High-side driver mode (ADJ tied to GND) enables direct control of low-side switches with fast enable/disable response. Use Value: Sub-5 µA disable current and 1.75 V enable threshold ensure zero-power state during vehicle sleep mode. |
Use Scenario: Delivers isolated, noise-immune reference voltage to CMOS image sensors mounted externally on vehicle mirrors or bumpers. IC Role / Device Role / Timing Role: Remote-tracking regulator compensates for IR drop across long harnesses by replicating a local reference at the camera end. Use Value: 45 V max input and reverse-current blocking prevent damage from induced transients on unshielded camera cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tracking regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4274CDSTR2G | SOIC-8 (non-EP), 50 mA output, fixed 5 V output only; no ADJ pin or tracking flexibility. | Suitable only for fixed-voltage sensor rails; lacks adjustable tracking and high-side driver capability. | Select when board space allows larger thermal footprint and design requires only 5 V output with no adjustment needed. |
| TLV71718PDQNR | Single-output LDO (not tracking), 150 mA, 1.8 V fixed, 170 mV dropout; no reverse-voltage or automotive qualification. | Intended for low-voltage digital I/O rails-not for analog sensor referencing or harsh automotive environments. | Choose only for non-automotive, non-tracking, low-voltage digital subsystems where AEC-Q100 is not required. |
Compared with NCV4254CPDAJR2G, the NCV4274CDSTR2G offers simpler fixed-voltage operation but sacrifices tracking precision and thermal performance, while the TLV71718PDQNR provides higher current at lower voltage but lacks automotive robustness, reverse protection, and reference-tracking functionality essential for sensor biasing.
Availability
NCV4254CPDAJR2G is available at Aetrix Electronics and suitable for automotive engine control units, ADAS radar modules, body electronics, and off-board sensor systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCV4254CPDAJR2G 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 power management and automotive-qualified components.
The NCV4254C product line delivers precision tracking regulators for automotive sensor interfaces, designed specifically to replace discrete op-amp + pass transistor solutions with monolithic, AEC-Q100-compliant integration.
FAQ
What is the primary function of the NCV4254CPDAJR2G?
The NCV4254CPDAJR2G is an adjustable low-dropout tracking voltage regulator that replicates an external reference voltage (applied to EN/REF) at its output with high accuracy (±3 mV). It delivers up to 70 mA while supporting configurations where VOUT equals, exceeds, or falls below VEN/REF-making it ideal for powering remote automotive sensors. Its ADJ pin enables flexible biasing schemes not possible with fixed-output LDOs.
Does the NCV4254CPDAJR2G support reverse input voltage protection?
Yes, the NCV4254CPDAJR2G supports reverse input voltage protection up to −16 V (with VOUT = 0 V) and reverse bias voltage up to −32 V (with VIN = 0 V), as specified in Table 3 of the datasheet. This prevents damage during incorrect battery connection or service disconnect events. Unlike many LDOs, it does not require external diodes for this protection, reducing BOM count and board area.
What package type does the NCV4254CPDAJR2G use, and why does it matter?
The NCV4254CPDAJR2G uses the SOIC-8 EP (Exposed Pad) package (Case 751AC), which features an internal thermal pad soldered to the PCB ground plane. This reduces thermal resistance to 75 °C/W (vs. 115 °C/W for standard SOIC-8), enabling reliable 70 mA operation at high ambient temperatures. The four GND pins and exposed pad also improve noise immunity-critical for analog sensor biasing in noisy automotive environments.
Can the NCV4254CPDAJR2G be used as a high-side driver?
Yes-the NCV4254CPDAJR2G's ADJ pin can be tied to GND to configure it as a high-side driver. In this mode, the output follows the EN/REF voltage with unity gain and high current drive capability (up to 70 mA), eliminating the need for external MOSFETs in simple switch-driver applications. This is explicitly documented in Figure 28 and the "Circuit Description" section of the datasheet.
Is the NCV4254CPDAJR2G still recommended for new designs?
No-the NCV4254CPDAJR2G is marked as DISCONTINUED in the official onsemi ordering table (page 13), and is not recommended for new designs. However, Aetrix Electronics maintains active inventory and provides full supply chain continuity support-including last-time-buy planning, cross-reference guidance, and migration path assistance-for legacy automotive programs still dependent on this qualified part.
NCV4254CPDAJR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 40V
- Voltage Dropout (Max):
- 0.4V @ 70mA
- Current - Output:
- 70mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- 2 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Current Limit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
NCV4254CPDAJR2G FAQ
1.How can I place an order for NCV4254CPDAJR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4254CPDAJR2G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCV4254CPDAJR2G reliable?
The price and inventory of NCV4254CPDAJR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4254CPDAJR2G is usually 5 days.
3.What payment methods are accepted for NCV4254CPDAJR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4254CPDAJR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4254CPDAJR2G?
NCV4254CPDAJR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4254CPDAJR2G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCV4254CPDAJR2G?
For technical support, including NCV4254CPDAJR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4254CPDAJR2G requirements.
6.How does Aetrix verify that NCV4254CPDAJR2G is sourced from the original manufacturer or authorized distributors?
All NCV4254CPDAJR2G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCV4254CPDAJR2G meets industry standards.
7.What is the process for return or replacement of NCV4254CPDAJR2G?
All NCV4254CPDAJR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4254CPDAJR2G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCV4254CPDAJR2G part is unused and in its original packaging.
Return procedure for NCV4254CPDAJR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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