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onsemi NCV2931CDR2
- Part No.:
- NCV2931CDR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV2931CDR2.pdf
- Description:
- IC REG LIN POS ADJ 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,737
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Product details
Overview
NCV2931CDR2 from onsemi is an automotive-grade adjustable-output LDO voltage regulator with 60 V load dump protection, 100 mA output current capability, and <0.6 V dropout at 100 mA - designed for harsh environments such as engine control units and body electronics where reverse polarity, transients, and thermal stress are common.
For engineers reviewing the NCV2931CDR2 datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, adjustable output range (3.0–24 V), ±5% output tolerance, SOIC-8 package, and integrated inhibit function for microprocessor-controlled power sequencing.
Technical Context
The NCV2931CDR2 implements a PNP pass transistor architecture enabling ultra-low dropout and high transient immunity. Its internal reference (1.20 V typ) feeds an error amplifier that controls the pass element via feedback from external resistors on the ADJ pin, allowing precise output voltage programming.
It integrates five critical protection mechanisms: 60 V load dump clamping, −50 V reverse polarity survival, thermal shutdown, internal current limiting, and mirror-image insertion tolerance - all verified across −40 °C to +125 °C operating ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 100 mA max - sufficient for powering MCU cores, sensors, and CAN transceivers without external boost. |
| Dropout Voltage | 0.16 V typ @ 100 mA - enables stable regulation even when input drops to within ~0.2 V of desired output. |
| Input Voltage Range | 6.0 V to 26 V continuous; withstands 60 V transients ≤100 ms - compatible with 12 V/24 V automotive battery rails. |
| Reference Voltage | 1.20 V ±0.06 V - sets accuracy baseline for externally adjusted output; enables 3.0–24 V programmable range. |
| Output Inhibit Threshold | 2.15 V (on) / 2.50 V (off) - allows clean logic-level enable/disable control from microcontrollers or wake-up circuits. |
| Thermal Shutdown | Activates at TJ = +150 °C - protects against sustained overload or poor heatsinking in enclosed modules. |
| Quiescent Bias Current | 0.4 mA @ 10 mA load - minimizes standby power loss in always-on vehicle subsystems. |
Pinout & Package
NCV2931CDR2 is housed in a Pb-free SOIC-8 (Case 751) package with exposed thermal pad (pin 4 connected to GND). The package supports surface-mount reflow and provides 160 °C/W junction-to-ambient thermal resistance under standard PCB pad conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Main regulated power output; connects to load and external feedback network. |
| 2 | GND | Analog ground reference; must be low-impedance connection to minimize noise and ensure stability. |
| 3 | Input | Unregulated input supply; requires local bypass capacitor (≥0.1 µF) near pin. |
| 4 | GND | Power ground / thermal pad tie point; electrically and thermally connected to exposed pad. |
| 5 | Adjust | Feedback node for output voltage setting; connects to resistor divider between VOUT and GND. |
| 6 | Output Inhibit | Active-high enable control; pulls output low when voltage <2.15 V (typ). |
| 7 | GND | Additional ground terminal; improves noise rejection and current return path integrity. |
| 8 | Output | Secondary output connection; paralleled internally with pin 1 for higher current routing flexibility. |
Key Features
| Feature | Design Value |
|---|---|
| 60 V Load Dump Protection | Survives ISO 7637-2 Pulse 5a transients without latch-up or degradation - eliminates need for external TVS in most ECU designs. |
| −50 V Reverse Polarity Immunity | Operates safely during battery jump-start misconnections - prevents damage to downstream circuitry without external diode. |
| Adjustable Output (3.0–24 V) | Configurable via two-resistor divider on ADJ pin - supports multiple rail voltages from single BOM item. |
| Output Inhibit Function | Enables zero-current shutdown mode controlled by MCU GPIO - reduces system standby power to sub-µA levels. |
| AEC-Q100 Qualified | Qualified to Grade 1 (−40 °C to +125 °C) with PPAP support - meets automotive OEM requirements for functional safety-critical power rails. |
Applications
| Engine Control Unit (ECU) Power Rail | Body Control Module (BCM) Sensor Supply |
|---|---|
Use Scenario: Powers 3.3 V microcontroller core and analog front-end in gasoline/diesel engine management systems exposed to cranking dips and alternator load dumps. IC Role / Device Role / Timing Role: Primary LDO regulator delivering stable 3.3 V from noisy 12 V battery rail; provides enable control for cold-start sequencing. Use Value: Eliminates need for discrete TVS + Schottky protection stack while maintaining <100 mV output deviation during 60 V/100 ms transients. | Use Scenario: Supplies regulated 5.0 V to door lock actuators, ambient light sensors, and LIN transceivers in vehicle body electronics. IC Role / Device Role / Timing Role: Adjustable LDO configured for 5.0 V output; inhibited during sleep mode to reduce quiescent current below 1 µA. Use Value: Enables single-supply design across multiple BCM variants using same NCV2931CDR2 footprint and resistor values. |
| Advanced Driver Assistance System (ADAS) Camera Module | Automotive Infotainment Display Backlight Driver |
Use Scenario: Provides clean 1.8 V bias to CMOS image sensor and ISP in rear-view or surround-view camera modules mounted near hot engine compartments. IC Role / Device Role / Timing Role: Low-noise LDO with 140 µVrms output noise; operates continuously across full automotive temperature range. Use Value: Maintains sensor SNR >65 dB despite junction temperatures up to +125 °C and input ripple from switching DC/DC converters. | Use Scenario: Generates 12 V for LED backlight strings in center-stack displays, interfacing with PWM dimming controller. IC Role / Device Role / Timing Role: Adjustable LDO set to 12 V; output inhibit synchronized with display on/off commands from head unit MCU. Use Value: Prevents backlight pop-on/pop-off artifacts by enabling/disabling output with <10 µs response time and no overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8664CDT50RKG | Fixed 5.0 V output; no adjust/inhibit pins; lower IQ (35 µA); 150 mA rating. | Suitable only for fixed-voltage use cases; lacks programmability and enable control. | Select when output voltage is fixed and ultra-low standby current is prioritized over flexibility. |
| TLV73312PDBVR | 12 V fixed output; 300 mA rating; no automotive qualification; 2.5 V min input; no load dump protection. | Not rated for automotive transients or extended temperature; limited to infotainment accessories. | Choose for cost-sensitive non-safety applications where 60 V transient immunity is unnecessary. |
Compared with NCV2931CDR2, NCV8664CDT50RKG offers higher current and lower quiescent power but forfeits adjustability and inhibit control, while TLV73312PDBVR provides greater output current and smaller footprint but lacks AEC-Q100 qualification and transient robustness - making NCV2931CDR2 the sole choice for programmable, protected, automotive-grade LDO needs.
Availability
NCV2931CDR2 is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, ADAS camera systems, and infotainment displays requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for NCV2931CDR2 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV2931 series belongs to onsemi's automotive power management portfolio, engineered specifically for under-hood and body electronics where reliability under extreme electrical stress and temperature is non-negotiable.
FAQ
What is the maximum input voltage the NCV2931CDR2 can withstand during load dump events?
The NCV2931CDR2 is rated for 60 V transient input voltage for durations ≤100 ms per ISO 7637-2 Pulse 5a. This is a hard-clamped specification verified across −40 °C to +125 °C ambient temperature. It does not require external TVS diodes for compliance in most automotive ECU designs. The device remains functional after such events without parameter shift or latent failure.
Does the NCV2931CDR2 require an external capacitor for stability, and what value is recommended?
Yes, the NCV2931CDR2 is not internally compensated and requires an external output capacitor. A minimum 10 µF low-ESR electrolytic or tantalum capacitor is recommended; 22 µF is optimal for stability across temperature and load. Capacitor impedance |ZO| must remain ≤0.4 Ω at 40 kHz. Ceramic capacitors alone are insufficient due to excessively low ESR causing instability.
How does the output inhibit function of the NCV2931CDR2 behave during power-up and shutdown sequences?
The NCV2931CDR2 output inhibit pin (pin 6) is active-high. When voltage on this pin falls below 2.15 V (typ), the output is disabled and sinks leakage current <1 µA. During power-up, the output remains off until inhibit voltage exceeds 2.50 V (typ). This hysteresis prevents chatter during slow-rising control signals and ensures glitch-free sequencing in microprocessor-based systems.
Can the NCV2931CDR2 be used to generate 3.3 V output, and what resistor values are needed for the feedback divider?
Yes, the NCV2931CDR2 supports 3.3 V output via external resistor divider on the ADJ pin. With VREF = 1.20 V, use R1 = 10 kΩ from VOUT to ADJ and R2 = 17.5 kΩ from ADJ to GND. This yields VOUT = 1.20 × (1 + R1/R2) ≈ 3.3 V. Tolerance contribution from both resistors and reference must be included in total output error budget.
Is the NCV2931CDR2 pin-compatible with other regulators in the LM2931/NCV2931 family?
No - the NCV2931CDR2 (SOIC-8, adjustable, inhibit-enabled) has a unique 8-pin pinout distinct from TO-220 (5-pin), DPAK (3-pin), or fixed-output SOIC-8 variants. Pin mapping differs significantly: e.g., fixed-output SOIC-8 lacks ADJ and inhibit pins, and places GND on pin 3 instead of pins 2/4/7. PCB layout must be specific to NCV2931CDR2.
NCV2931CDR2 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):
- 26V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 29.5V
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 mA
- Current - Supply (Max):
- 6 mA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV2931CDR2 FAQ
1.How can I place an order for NCV2931CDR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV2931CDR2 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 NCV2931CDR2 reliable?
The price and inventory of NCV2931CDR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV2931CDR2 is usually 5 days.
3.What payment methods are accepted for NCV2931CDR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV2931CDR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV2931CDR2?
NCV2931CDR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV2931CDR2 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 NCV2931CDR2?
For technical support, including NCV2931CDR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV2931CDR2 requirements.
6.How does Aetrix verify that NCV2931CDR2 is sourced from the original manufacturer or authorized distributors?
All NCV2931CDR2 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 NCV2931CDR2 meets industry standards.
7.What is the process for return or replacement of NCV2931CDR2?
All NCV2931CDR2 units undergo pre-shipment inspection (PSI). If there is an issue with NCV2931CDR2, 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 NCV2931CDR2 part is unused and in its original packaging.
Return procedure for NCV2931CDR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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