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onsemi NCV47701DAJR2G
- Part No.:
- NCV47701DAJR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV47701DAJR2G.pdf
- Description:
- IC REG LIN POS ADJ 350MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,933
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Product details
Overview
NCV47701DAJR2G from onsemi is an automotive-grade adjustable-output low dropout (LDO) regulator delivering up to 350 mA with ±3% output voltage accuracy across 5 V–20 V range, reverse input voltage protection (−42 V), thermal shutdown (150 °C), and adjustable current limit (10–350 mA via external resistor). It serves as a primary power rail for infotainment audio subsystems in harsh-temperature vehicle environments.
For engineers reviewing the NCV47701DAJR2G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, SOIC-8 pin mapping, real-world automotive use cases, and two validated alternative LDOs with documented functional differences.
Technical Context
The NCV47701DAJR2G uses a PNP pass transistor controlled by a bandgap-referenced error amplifier (VREF1 = 1.275 V), enabling ultra-low dropout (250 mV typical at 150 mA) and stable regulation under wide input (5.5–40 V) and junction temperature (−40 °C to +150 °C) ranges. Its integrated current sense output (CSO) provides proportional voltage (ICSO/Iout = 1/100 ±10%) for real-time load monitoring and fault diagnosis.
Enable logic thresholds (0.8 V low, 3.5 V high) support direct 5 V microcontroller interfacing, while reverse input voltage protection and thermal shutdown ensure robustness in automotive transients. The device requires no bypass capacitor for basic operation but supports optional Cb between ADJ and Vout to optimize loop stability with low-ESR ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 350 mA max - sufficient for powering audio DSPs, display drivers, or MCU peripherals without external boost stages. |
| Output Voltage Range | 5 V to 20 V adjustable - set via external R1/R2 divider; enables single BOM for multiple system rails. |
| Output Voltage Accuracy | ±3% over line/load/temp - ensures stable supply for precision analog circuits like ADC references or Class D amplifier biasing. |
| Dropout Voltage | 250 mV typical at 150 mA - maintains regulation even during cold-crank (6.5 V battery) when Vout = 5 V. |
| Current Limit Range | 10 mA to 350 mA, adjustable via RCSO - allows precise fault-current tailoring for downstream IC protection. |
| Input Voltage Range | 5.5 V to 40 V operating; −42 V reverse tolerance - withstands load dump (ISO 7637-2 Pulse 5a) and battery reversal. |
| Thermal Shutdown | 150 °C activation - protects against sustained overload or poor PCB heatsinking in enclosed instrument clusters. |
Pinout & Package
NCV47701DAJR2G is packaged in Pb-free SOIC-8 (Case 751, suffix D), with exposed pad omitted. Pin 1 is ADJ; pins 6 and 7 are NC; EPAD is not present. Thermal resistance is 121 °C/W (single-layer PCB) or 77 °C/W (4-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ADJ | Feedback reference node | Connects to resistor divider (R1/R2) to set output voltage; internal 1.275 V reference referenced here. |
| 2 - GND | Power ground return | Primary ground path for regulator core and current sense circuitry; must be low-impedance to minimize sensing error. |
| 3 - EN | Logic-level enable control | Active-high input; <0.8 V disables output, >3.5 V enables - compatible with 5 V MCUs without level-shifting. |
| 4 - CSO | Current sense output | Provides voltage proportional to Iout (2.55 V at ILIM); used for diagnostics, current limiting, and system-level fault reporting. |
| 5 - Vin | Main input supply | Accepts 5.5–40 V DC; includes reverse-voltage protection - connects directly to battery or fused distribution rail. |
| 6 - NC | No connection | Internally unconnected; must remain floating - no routing or copper pour required. |
| 7 - NC | No connection | Internally unconnected; must remain floating - no routing or copper pour required. |
| 8 - Vout | Regulated output | Delivers stable 5–20 V output; requires ≥1 µF ceramic Cout; ESR stability region defined per Figure 17. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable current limit | Set precisely from 10 mA to 350 mA using single external resistor (RCSO), enabling tailored short-circuit protection per load. |
| Integrated current sense | CSO pin outputs voltage linearly proportional to output current (1% full-scale error), eliminating need for external sense resistors or amplifiers. |
| Reverse input voltage protection | Withstands −42 V at Vin - prevents damage during battery installation errors or jump-start scenarios in 12 V systems. |
| Automotive qualification | AEC-Q100 Grade 1 qualified (−40 °C to +125 °C ambient), with 150 °C junction thermal shutdown - meets ISO 16750-2 environmental stress requirements. |
| Low quiescent current | 150 µA typical at light load (1 mA), rising to only 50 mA at 350 mA - minimizes standby power loss in always-on modules. |
Applications
| Audio Power Supply | Instrument Cluster Core Rail |
|---|---|
|
Use Scenario: Powers digital signal processors and DACs in vehicle head units requiring clean, stable 5.5 V or 9 V rails. IC Role / Device Role / Timing Role: Primary LDO supplying regulated voltage to audio processing ICs; CSO monitors dynamic load changes during playback peaks. Use Value: ±3% output accuracy and 100 µVrms noise prevent audible distortion; adjustable current limit avoids nuisance shutdown during transient bass hits. |
Use Scenario: Supplies microcontroller, backlight driver, and CAN transceiver in analog/digital instrument clusters. IC Role / Device Role / Timing Role: Central power management IC providing isolated, protected 5 V rail; EN pin synchronized with ignition state. Use Value: −42 V reverse protection prevents field failures from battery misconnection; thermal shutdown guards against enclosure overheating. |
| Navigation System PMIC Stage | Satellite Radio Front-End Bias |
|
Use Scenario: Generates 12 V intermediate rail for GPS/GNSS RF front-end and baseband processor in embedded navigation modules. IC Role / Device Role / Timing Role: Adjustable-output LDO stepping down from 13.5 V battery to 12 V; CSO feeds diagnostic bus for OEM telematics. Use Value: 40 V absolute max input handles load-dump transients; 250 mV dropout ensures regulation during engine cranking (6.5 V). |
Use Scenario: Provides 5 V bias to low-noise amplifier (LNA) and tuner ICs in satellite radio receivers mounted in roof or trunk. IC Role / Device Role / Timing Role: Low-noise, high-PSRR (70 dB @ 100 Hz) regulator isolating sensitive RF circuitry from noisy vehicle power bus. Use Value: 100 µVrms output noise prevents desensitization of weak satellite signals; PSRR suppresses alternator ripple at critical IF frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV47701PDAJR2G | Same die, SOIC-8 EP package with exposed thermal pad; RθJA = 29 °C/W (4-layer PCB) vs. 77 °C/W for SOIC-8. | Better thermal performance required for >250 mA continuous loads in compact enclosures or high-ambient environments. | Select NCV47701PDAJR2G when board layout allows thermal pad connection to inner ground plane and power dissipation exceeds 0.8 W. |
| NCV8664DSADJR2G | Fixed 5 V output, 250 mA, ±2% accuracy, no CSO pin, lower IQ (55 µA), no reverse-voltage protection. | Lower-cost option where fixed 5 V rail suffices and diagnostic current monitoring is unnecessary. | Choose NCV8664DSADJR2G only for cost-sensitive non-diagnostic 5 V rails; not suitable for adjustable or reverse-protected designs. |
Compared with NCV47701DAJR2G, the PDAJR2G variant improves thermal handling via exposed pad but shares identical electrical behavior, while the NCV8664DSADJR2G sacrifices adjustability, current sense, and reverse protection for lower cost and quiescent current - making it a functional substitute only in fixed-rail, non-diagnostic use cases.
Availability
NCV47701DAJR2G is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument cluster electronics, and satellite radio modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for NCV47701DAJR2G 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 power management, analog, sensor, and automotive ICs, with deep expertise in AEC-Q100-qualified components.
The NCV47701DAJR2G belongs to onsemi's automotive LDO family designed specifically for harsh-environment power regulation in infotainment, body electronics, and ADAS subsystems - emphasizing fault resilience, wide temperature operation, and integrated diagnostics.
FAQ
What is the maximum input voltage the NCV47701DAJR2G can withstand?
The NCV47701DAJR2G has an absolute maximum input voltage rating of +45 V and −42 V reverse voltage. Its recommended operating input range is 5.5 V to 40 V. This −42 V reverse tolerance enables safe operation during battery installation errors or jump-start conditions in 12 V automotive systems, a key reliability feature absent in most commercial-grade LDOs.
How is the output voltage set on the NCV47701DAJR2G?
The NCV47701DAJR2G output voltage is set externally using a resistor divider between Vout and GND, with the ADJ pin connected to the midpoint. The internal reference is 1.275 V, so Vout = 1.275 × (1 + R1/R2). R2 should be ≤50 kΩ to minimize error from ADJ pin bias current. This allows precise adjustment from 5 V to 20 V with standard resistor tolerances.
What does the CSO pin do on the NCV47701DAJR2G?
The CSO (Current Sense Output) pin on the NCV47701DAJR2G provides a voltage proportional to output current (ICSO/Iout = 1/100 ±10%). At current limit, CSO = 2.55 V ±8%. This enables real-time load monitoring, open-load detection, and programmable overcurrent protection without external sense resistors - a key diagnostic capability for automotive functional safety.
Is the NCV47701DAJR2G pin-compatible with other regulators in the NCV477xx family?
The NCV47701DAJR2G shares identical SOIC-8 pinout with NCV47700 (fixed 5 V) and NCV47710/NCV47711 (3.3 V logic-compatible EN), but differs in EN threshold and current limit architecture. While pin assignments match, EN logic levels and CSO functionality vary - direct replacement requires validation of enable compatibility and current-sense integration in the target design.
What thermal performance can be expected from the NCV47701DAJR2G in a standard SOIC-8 layout?
In a standard SOIC-8 footprint on a 4-layer PCB with 1 oz copper, the NCV47701DAJR2G achieves RθJA = 77 °C/W. At 350 mA and 13.5 V input regulating 5 V, power dissipation is ~3.0 W, resulting in ~230 °C junction rise - exceeding safe limits. Derating to ≤200 mA (1.2 W dissipation) keeps TJ ≤125 °C ambient. For higher loads, the EP variant (NCV47701PDAJR2G) is recommended.
NCV47701DAJR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 20V
- Voltage Dropout (Max):
- 0.5V @ 150mA
- Current - Output:
- 350mA
- Current - Quiescent (Iq):
- 230 µA
- Current - Supply (Max):
- 50 mA
- PSRR:
- 70dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV47701DAJR2G FAQ
1.How can I place an order for NCV47701DAJR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV47701DAJR2G 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 NCV47701DAJR2G reliable?
The price and inventory of NCV47701DAJR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV47701DAJR2G is usually 5 days.
3.What payment methods are accepted for NCV47701DAJR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV47701DAJR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV47701DAJR2G?
NCV47701DAJR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV47701DAJR2G 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 NCV47701DAJR2G?
For technical support, including NCV47701DAJR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV47701DAJR2G requirements.
6.How does Aetrix verify that NCV47701DAJR2G is sourced from the original manufacturer or authorized distributors?
All NCV47701DAJR2G 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 NCV47701DAJR2G meets industry standards.
7.What is the process for return or replacement of NCV47701DAJR2G?
All NCV47701DAJR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV47701DAJR2G, 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 NCV47701DAJR2G part is unused and in its original packaging.
Return procedure for NCV47701DAJR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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