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onsemi NCV8842PWR2G
- Part No.:
- NCV8842PWR2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8842PWR2G.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
NCV8842PWR2G from onsemi is a high-efficiency, current-mode PWM step-down DC-DC converter IC designed for automotive applications. It delivers up to 2 A output current, operates from 4.5 V to 40 V input, integrates a 120 mΩ high-side MOSFET, supports adjustable 1.23 V reference, and features thermal shutdown and overcurrent protection. It is used in automotive infotainment power rails and body control modules.
For engineers reviewing the NCV8842PWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (4.5–40 V), integrated high-side FET RDS(on), current-mode control stability, AEC-Q100 Grade 1 qualification, and adjustable switching frequency (100 kHz to 2.5 MHz).
Technical Context
The NCV8842PWR2G implements fixed-frequency current-mode PWM control with internal slope compensation to suppress subharmonic oscillation at duty cycles above 50%. Its error amplifier compares feedback voltage against a precision 1.23 V reference, and the current-sense amplifier monitors high-side MOSFET conduction time for cycle-by-cycle current limiting.
It includes undervoltage lockout (UVLO) with 4.1 V turn-on and 3.7 V hysteresis, thermal shutdown at 165 °C, and soft-start via external capacitor. The device supports synchronization to an external clock up to 2.5 MHz and provides power-good indication with 1% accuracy.
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 automotive 12 V systems. |
| Output Current | Up to 2 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in ECUs. |
| Integrated High-Side FET RDS(on) | 120 mΩ typical - reduces external component count and improves efficiency at medium loads. |
| Reference Voltage | 1.23 V ±1.5% - enables precise output regulation with standard resistor-divider feedback. |
| Switching Frequency | Adjustable 100 kHz to 2.5 MHz - allows optimization of size (higher fSW) vs. EMI/efficiency (lower fSW). |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for under-hood and cabin automotive environments. |
| Power-Good Accuracy | ±1% threshold - ensures reliable system-level power sequencing and fault detection. |
Pinout & Package
NCV8842PWR2G is housed in a thermally enhanced 8-pin SOIC package (SOIC-8 NB, 3.9 mm × 4.9 mm) with exposed thermal pad for improved heat dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 4.5–40 V; must be decoupled near pin with ≥10 µF ceramic capacitor. |
| GND | Power ground reference | Common return for input/output paths and internal circuitry; connects to thermal pad. |
| SW | Switch node | Drives external inductor; requires low-inductance layout to minimize EMI and ringing. |
| FB | Feedback input | Resistor divider from VOUT sets regulated output voltage using 1.23 V internal reference. |
| EN | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 12 µA. |
| PG | Power-good open-drain output | Sinks current when VOUT is within ±1% of target; used for sequencing or MCU reset assertion. |
| SYNC | Frequency synchronization input | Accepts external clock (100 kHz–2.5 MHz) to align switching with other converters and reduce beat frequencies. |
| SS | Soft-start timing capacitor | External capacitor sets ramp time for controlled output voltage rise; prevents inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode PWM control | Enables fast transient response and inherent cycle-by-cycle current limiting without external sense resistor. |
| Internal 120 mΩ high-side MOSFET | Eliminates need for external high-side switch, reducing BOM count and board area in space-constrained ECUs. |
| Adjustable switching frequency (100 kHz–2.5 MHz) | Allows trade-off between inductor size (smaller at high fSW) and conduction losses (lower at low fSW). |
| Power-good output with ±1% accuracy | Provides deterministic system power-up sequencing and reliable fault flagging for safety-critical functions. |
| Thermal shutdown with hysteresis | Shuts down at 165 °C and restarts at ~150 °C, preventing thermal runaway during overload or poor heatsinking. |
Applications
| Automotive Infotainment Power Supply | Body Control Module (BCM) Core Rail |
|---|---|
Use Scenario: Powers audio DSP, display controller, and USB interface in head-unit systems requiring stable 3.3 V or 5 V from vehicle battery. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, regulated core voltage with tight load regulation and low noise. Use Value: Maintains <±2% output regulation across 0.1–2 A load steps and survives 40 V load-dump transients per ISO 7637-2. | Use Scenario: Supplies microcontroller, LIN transceivers, and sensor interfaces in door module or lighting control unit. IC Role / Device Role / Timing Role: Main DC-DC converter delivering 5 V rail with enable control synchronized to vehicle ignition state. Use Value: Achieves 12 µA shutdown current and meets AEC-Q100 Grade 1 requirements for extended temperature operation. |
| ADAS Camera Module Power | Engine Control Unit (ECU) Auxiliary Rail |
Use Scenario: Generates 1.8 V or 2.8 V for CMOS image sensor and ISP in rear-view or surround-view camera systems. IC Role / Device Role / Timing Role: Secondary buck regulator with adjustable frequency to avoid interference with image sensor pixel clock. Use Value: Supports 2.5 MHz sync capability to shift switching noise away from critical video bandwidths. | Use Scenario: Provides isolated 3.3 V supply for CAN FD transceiver and diagnostic circuitry in engine management systems. IC Role / Device Role / Timing Role: Dedicated auxiliary regulator with independent enable and PG signaling for fail-safe communication path. Use Value: Delivers robust operation during cranking (4.5 V VIN) and maintains PG assertion only when output is within ±1% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678SD-5.0/NOPB | Fixed 5 V output; no adjustable frequency or SYNC; 5.5–40 V input; 5 A rating. | Higher current capacity but less flexible for multi-rail designs requiring different output voltages or EMI-sensitive timing. | Choose when fixed 5 V output and higher current headroom are prioritized over programmability and automotive qualification. |
| MPQ4312-AEC1 | AEC-Q100 Grade 1; 3.5–36 V input; 2 A; 125 mΩ FET; supports spread-spectrum modulation. | Includes spread-spectrum EMI reduction not present in NCV8842PWR2G; lacks PG accuracy spec (±2% vs. ±1%). | Prefer when EMI compliance in dense automotive PCBs is critical and ±2% PG tolerance is acceptable. |
Compared with LM2678SD-5.0/NOPB and MPQ4312-AEC1, the NCV8842PWR2G offers tighter power-good accuracy (±1%), full frequency adjustability including SYNC, and optimized thermal performance in SOIC-8 NB - making it preferred for multi-output, EMI-aware, and safety-sequenced automotive subsystems.
Availability
NCV8842PWR2G is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, ADAS camera power supplies, and engine control unit auxiliary rails requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for NCV8842PWR2G 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 leader focused on energy-efficient electronics, with deep expertise in automotive, industrial, cloud, and IoT applications. It emphasizes functional safety, reliability, and sustainability across its product portfolio.
The NCV8842PWR2G belongs to onsemi's Automotive Power Management IC family, engineered specifically for demanding 12 V automotive electrical systems where input transients, thermal constraints, and ASIL-ready diagnostics are critical design factors.
FAQ
What is the maximum input voltage rating for the NCV8842PWR2G?
The NCV8842PWR2G supports a maximum input voltage of 40 V, enabling robust operation during automotive load-dump events per ISO 7637-2. This rating is absolute maximum and sustained operation above 36 V should be avoided unless transient conditions are confirmed. The device includes internal protection circuits that remain functional across its full 4.5 V to 40 V operating range, and the NCV8842PWR2G maintains regulation and thermal safety even under these extremes.
Does the NCV8842PWR2G require an external MOSFET?
No, the NCV8842PWR2G integrates a 120 mΩ high-side MOSFET, eliminating the need for an external switch. This integration simplifies design, reduces PCB footprint, and improves efficiency at medium load currents. All necessary gate drive, current sensing, and protection logic are internal, and the NCV8842PWR2G operates as a complete synchronous buck controller without external power switches.
Is the NCV8842PWR2G qualified for automotive use?
Yes, the NCV8842PWR2G is AEC-Q100 qualified to Grade 1 (−40 °C to +125 °C ambient), with full PPAP documentation and automotive-grade process controls. It meets stringent automotive reliability, ESD, and transient immunity requirements, and the NCV8842PWR2G is intended for use in engine compartments, cabins, and other safety-relevant subsystems where qualification is mandatory.
How is output voltage set on the NCV8842PWR2G?
Output voltage is set using a resistor divider from VOUT to FB and from FB to GND, referencing the internal 1.23 V precision bandgap. The formula is VOUT = 1.23 V × (1 + R1/R2). Standard E24 values yield accurate results, and the NCV8842PWR2G maintains ±1.5% reference tolerance over temperature and line/load conditions.
Can the NCV8842PWR2G synchronize to an external clock?
Yes, the NCV8842PWR2G accepts an external clock signal on the SYNC pin, supporting frequencies from 100 kHz to 2.5 MHz. This allows synchronization with other converters to avoid beat frequencies and reduce EMI peaks. The NCV8842PWR2G maintains phase alignment and stable operation across the full sync range without requiring additional components or configuration registers.
NCV8842PWR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.27V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 170kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCV8842PWR2G FAQ
1.How can I place an order for NCV8842PWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8842PWR2G 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 NCV8842PWR2G reliable?
The price and inventory of NCV8842PWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8842PWR2G is usually 5 days.
3.What payment methods are accepted for NCV8842PWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8842PWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8842PWR2G?
NCV8842PWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8842PWR2G 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 NCV8842PWR2G?
For technical support, including NCV8842PWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8842PWR2G requirements.
6.How does Aetrix verify that NCV8842PWR2G is sourced from the original manufacturer or authorized distributors?
All NCV8842PWR2G 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 NCV8842PWR2G meets industry standards.
7.What is the process for return or replacement of NCV8842PWR2G?
All NCV8842PWR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8842PWR2G, 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 NCV8842PWR2G part is unused and in its original packaging.
Return procedure for NCV8842PWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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