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onsemi NCV891130PD40R2G
- Part No.:
- NCV891130PD40R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV891130PD40R2G.pdf
- Description:
- IC REG BUCK 3.3V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,845
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Product details
Overview
NCV891130PD40R2G from onsemi is an automotive-grade, 3.0 A synchronous buck DC-DC converter with integrated high- and low-side MOSFETs, 4.5 V to 40 V input range, 1.2 V to 12 V adjustable output, ±1% output voltage accuracy, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C junction). It delivers regulated power for engine control units and ADAS domain controllers.
For engineers reviewing the NCV891130PD40R2G datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range compatibility with 12 V/24 V automotive batteries, tight output voltage tolerance for MCU core supply, thermal performance in sealed ECU enclosures, and functional safety support via power-good flag and overtemperature shutdown.
Technical Context
The NCV891130PD40R2G implements a current-mode PWM control architecture with internal compensation, enabling stable regulation across wide load transients. It integrates 40 mΩ high-side and 20 mΩ low-side MOSFETs optimized for low conduction loss at 3 A continuous output.
It supports external synchronization (SYNC pin) up to 2.2 MHz, includes precision enable threshold (1.22 V), and provides monotonic startup into pre-biased loads - critical for multi-rail automotive SoC power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports cold-crank (4.5 V) and load-dump (40 V) conditions in 12 V/24 V vehicle systems. |
| Output Current | 3.0 A continuous - sufficient for powering dual-core automotive MCUs or radar sensor SoCs without external heatsinking. |
| Output Voltage Accuracy | ±1% over line/load/temperature - ensures reliable operation of 1.2 V or 1.8 V digital cores without margining overhead. |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz - enables optimization between efficiency (low fSW) and small external component size (high fSW). |
| Thermal Shutdown | 165 °C with hysteresis - protects against sustained overload in sealed under-hood environments. |
| Power-Good Flag | Open-drain, accurate ±7.5% window - provides deterministic system reset signaling for ASIL-B–compliant power sequencing. |
Pinout & Package
NCV891130PD40R2G is housed in a thermally enhanced 40-pin QFN package (7 mm × 7 mm × 0.85 mm) with exposed thermal pad for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5–40 V; connects directly to battery rail through input capacitor bank. |
| SW | Switch node | Drives external LC filter; requires low-inductance layout to minimize EMI and ringing. |
| VOUT | Regulated output | Delivers up to 3 A; routed to output capacitors and downstream loads with minimal trace resistance. |
| EN | Enable control | Active-high logic input with 1.22 V threshold; used for controlled power-up sequencing with microcontroller GPIO. |
| PGOOD | Power-good indicator | Open-drain signal asserted when VOUT is within ±7.5% of target; drives reset controller or FPGA configuration logic. |
| SYNC | External clock input | Accepts 200 kHz–2.2 MHz square wave; synchronizes switching to avoid beat frequencies in multi-converter systems. |
| FB | Feedback input | Resistor-divider input for adjustable output; sets VOUT = 0.8 V × (1 + R1/R2) with 0.8 V internal reference. |
| PGND | Power ground | High-current return path for MOSFETs and inductor; must be connected to thermal pad and isolated from analog ground. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external FET selection and gate drive design; reduces BOM count by ≥4 components versus discrete controller solutions. |
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation - meets temperature requirements for engine bay and transmission control modules. |
| Monotonic start-up into pre-biased loads | Prevents reverse current flow during hot-plug or multi-rail sequencing - essential for safe power-up of SoCs with multiple independent rails. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and fast transient response (< 10 µs recovery from 50% load step) for radar and camera power domains. |
| Programmable soft-start | Configurable via external capacitor (0.1–10 nF); prevents inrush current spikes that could trip upstream fuse or cause bus droop. |
Applications
| Engine Control Unit (ECU) | ADAS Front Camera Module |
|---|---|
Use Scenario: Regulating 5 V or 3.3 V supply for 32-bit automotive MCU and CAN transceiver in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary DC-DC regulator delivering stable core and I/O voltage under harsh battery transients. Use Value: Withstands 4.5 V cold-crank and 40 V load-dump events while maintaining ±1% output accuracy - eliminates need for external LDO post-regulation. | Use Scenario: Powering image signal processor (ISP) and CMOS image sensor in forward-facing driver assistance cameras. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 1.2 V core and 1.8 V I/O rails with precise sequencing. Use Value: Monotonic start-up and PGOOD flag ensure deterministic ISP initialization - avoids corrupted frame capture during boot. |
| Radar Sensor Power Supply | Body Control Module (BCM) |
Use Scenario: Generating 1.1 V and 1.8 V supplies for 77 GHz radar SoC in corner radar or blind-spot detection units. IC Role / Device Role / Timing Role: Synchronous buck regulator supporting high-frequency switching (≥1.5 MHz) to minimize EMI near RF front-end. Use Value: Adjustable frequency up to 2.2 MHz allows layout separation from antenna traces - meets CISPR 25 Class 5 radiated emissions limits. | Use Scenario: Providing 5 V rail for LIN transceivers, LED drivers, and microcontroller peripherals in centralized body electronics. IC Role / Device Role / Timing Role: Robust primary regulator handling intermittent loads from door lock actuators and interior lighting. Use Value: Integrated thermal shutdown and overcurrent protection prevent field failures due to shorted LED strings or motor stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | 4.5–36 V input, 3.5 A, fixed 5 V or adjustable output; no SYNC pin; smaller 3×3 mm QFN-12 package. | Limited to lower max input voltage; lacks synchronization capability for noise-sensitive radar systems. | Preferred for space-constrained BCM or infotainment USB ports where 36 V max suffices and sync is unnecessary. |
| TPS543B20RHLT | 4.5–18 V input, 3 A, PMBus interface, 0.5% output accuracy; requires external MOSFETs; 20-pin QFN. | Narrower input range excludes direct use in 24 V commercial vehicles; adds digital configurability but increases complexity. | Suitable for ASIL-C diagnostic-heavy applications requiring telemetry, but not for cost-sensitive ECU designs needing integrated FETs. |
Compared with MPQ4436-AEC1 and TPS543B20RHLT, the NCV891130PD40R2G uniquely combines 40 V input tolerance, integrated FETs, SYNC capability, and AEC-Q100 Grade 1 - making it optimal for under-hood ECUs and radar modules where robustness and EMI control are non-negotiable.
Availability
NCV891130PD40R2G is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and radar sensor power supplies requiring stable component supply across automotive production lifecycles.
Supply support for NCV891130PD40R2G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV891130PD40R2G belongs to onsemi's Automotive Power Management portfolio, designed specifically for high-reliability, high-transient automotive subsystems requiring AEC-Q100 compliance and extended temperature operation.
FAQ
What is the maximum input voltage rating for the NCV891130PD40R2G?
The NCV891130PD40R2G supports a maximum input voltage of 40 V, validated per AEC-Q100 stress testing to withstand automotive load-dump events. This rating is absolute - exceeding 40 V risks permanent damage. The device operates continuously from 4.5 V to 40 V, covering cold-crank (4.5 V) and alternator surge (40 V) conditions without derating. Input voltage must be filtered with appropriate bulk capacitance before VIN to limit dv/dt stress.
Does the NCV891130PD40R2G require external MOSFETs?
No, the NCV891130PD40R2G integrates both high-side and low-side power MOSFETs internally, eliminating the need for external switches, gate drivers, or associated bias circuitry. Its 40 mΩ high-side and 20 mΩ low-side FETs are optimized for 3 A continuous output at typical automotive ambient temperatures. This integration reduces total solution size by ~30% versus discrete controller+FET solutions and improves efficiency by minimizing gate drive losses.
How does the NCV891130PD40R2G handle pre-biased output conditions during startup?
NCV891130PD40R2G implements monotonic start-up into pre-biased loads: its internal control loop prevents reverse current flow by disabling the low-side FET until the output voltage rises above the target. This behavior is verified across temperature and load conditions and ensures safe power sequencing in multi-rail systems where downstream regulators may retain residual voltage. No external circuitry is required to achieve this function.
What thermal management considerations apply to the NCV891130PD40R2G in sealed enclosures?
The NCV891130PD40R2G uses a 7 mm × 7 mm QFN package with exposed thermal pad. In sealed enclosures, ≥4 cm² of 2-oz copper connected to the pad via ≥6 thermal vias (0.3 mm diameter) is required to maintain ≤125 °C junction temperature at 3 A full load and 85 °C ambient. Thermal simulation using onsemi's recommended layout is advised for under-hood deployments exceeding 70 °C ambient.
Is the NCV891130PD40R2G compatible with functional safety standards like ISO 26262?
The NCV891130PD40R2G is AEC-Q100 Grade 1 qualified and includes safety-relevant features such as overtemperature shutdown, overcurrent protection, and a precise power-good flag with ±7.5% window - all documented in its safety manual. While it is not ASIL-certified as a standalone component, it is designed to support ASIL-B system architectures when used with appropriate diagnostics and monitoring. System-level FMEDA and safety analysis remain the responsibility of the end customer.
NCV891130PD40R2G 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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.7V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
NCV891130PD40R2G FAQ
1.How can I place an order for NCV891130PD40R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV891130PD40R2G 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 NCV891130PD40R2G reliable?
The price and inventory of NCV891130PD40R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV891130PD40R2G is usually 5 days.
3.What payment methods are accepted for NCV891130PD40R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV891130PD40R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV891130PD40R2G?
NCV891130PD40R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV891130PD40R2G 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 NCV891130PD40R2G?
For technical support, including NCV891130PD40R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV891130PD40R2G requirements.
6.How does Aetrix verify that NCV891130PD40R2G is sourced from the original manufacturer or authorized distributors?
All NCV891130PD40R2G 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 NCV891130PD40R2G meets industry standards.
7.What is the process for return or replacement of NCV891130PD40R2G?
All NCV891130PD40R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV891130PD40R2G, 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 NCV891130PD40R2G part is unused and in its original packaging.
Return procedure for NCV891130PD40R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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