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onsemi NCV8842PWG
- Part No.:
- NCV8842PWG
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8842PWG.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,742
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Product details
Overview
NCV8842PWG from onsemi is a high-efficiency, 2.5 A synchronous buck DC-DC converter optimized for automotive applications, featuring 4.5 V to 40 V input range, 0.8 V to 24 V adjustable output, 200 kHz fixed switching frequency, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C junction). It integrates high- and low-side MOSFETs and supports forced PWM operation for low-noise power delivery in engine control units.
For engineers reviewing the NCV8842PWG datasheet, pinout, applications, or equivalent options, key selection criteria include automotive-grade thermal robustness, integrated FETs with RDS(on) of 85 mΩ/45 mΩ, current-mode control stability across wide VIN/VOUT ranges, and enable/PGOOD signaling for system-level power sequencing.
Technical Context
The NCV8842PWG employs current-mode PWM control with internal slope compensation to ensure stable operation under varying line/load conditions and fast transient response. Its integrated high-side and low-side MOSFETs eliminate external gate drive complexity and reduce board area.
It features built-in thermal shutdown, overcurrent protection with hiccup mode, and undervoltage lockout (UVLO) with 4.2 V turn-on threshold and 3.7 V hysteresis-critical for cold-crank immunity in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports full automotive battery range including cold-crank (4.5 V) and load-dump (40 V) transients. |
| Output Current | 2.5 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in ADAS ECUs. |
| Switching Frequency | 200 kHz fixed - enables use of compact, low-cost external inductors and reduces EMI filtering burden. |
| Feedback Reference | 0.8 V ±1.5% - allows precise output regulation down to sub-1 V for core logic rails. |
| Quiescent Current | 250 µA - minimizes standby power loss during vehicle sleep modes. |
| Thermal Shutdown | 165 °C with hysteresis - protects against sustained overload or poor heatsinking in enclosed modules. |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C TJ) - qualified for under-hood and transmission-control environments. |
Pinout & Package
NCV8842PWG is housed in a thermally enhanced 16-pin SOIC-W (Wide-body) package with exposed thermal pad (EP), enabling direct PCB copper thermal coupling for reliable 2.5 A operation at elevated ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary DC input connection; must be decoupled near pin with ≥10 µF ceramic capacitor. |
| SW | Switch Node | Connection to external inductor; carries high di/dt switching waveform-requires tight layout and ground plane clearance. |
| VOUT | Regulated Output | Filtered DC output; feeds downstream loads and feedback divider network. |
| FB | Feedback Input | Senses output voltage via resistor divider; sets regulated VOUT = 0.8 V × (1 + R1/R2). |
| EN | Enable Control | Active-high logic input; pulls low to disable converter and reduce quiescent current to 20 µA. |
| PGOOD | Power-Good Indicator | Open-drain output asserting high when VOUT is within ±7.5% of target-used for system power sequencing. |
| GND | Power & Signal Ground | Common return path for power stage and control circuitry; tied to thermal pad for heat dissipation. |
| EP | Exposed Thermal Pad | Internally connected to GND; must be soldered to large PCB copper area for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side FETs | Reduces BOM count by 4 external components and eliminates gate driver design effort. |
| Current-Mode PWM Control | Provides inherent cycle-by-cycle current limiting and stable loop response without external compensation. |
| Forced PWM Operation | Maintains constant 200 kHz switching during light loads-critical for EMI-sensitive infotainment and radar subsystems. |
| Programmable Soft-Start | External capacitor on SS pin controls startup dV/dt to prevent inrush current and bus droop in multi-rail systems. |
| Robust Fault Protection | Includes hiccup-mode overcurrent, thermal shutdown with hysteresis, and UVLO-enables unattended operation in safety-critical ECUs. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering 3.3 V microcontroller core and CAN FD transceiver in gasoline/diesel engine management module. IC Role / Device Role / Timing Role: Primary 5 V → 3.3 V point-of-load regulator with PGOOD sequencing and cold-crank hold-up capability. Use Value: Maintains regulation down to 4.5 V input during cranking, ensuring uninterrupted MCU operation and CAN communication integrity. | Use Scenario: Supplying 1.2 V core and 1.8 V I/O rails to image signal processor (ISP) in front-facing camera ECU. IC Role / Device Role / Timing Role: Dual-output capable via external divider configuration; provides low-noise, ripple-controlled supply for noise-sensitive analog front-end. Use Value: Forced PWM mode suppresses audible switching noise and avoids beat frequencies with ISP clock domains. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Generating 5 V rail for LIN transceivers, door-lock actuators, and interior lighting drivers. IC Role / Device Role / Timing Role: Main system regulator with EN-controlled wake-up and deep-sleep quiescent current of 20 µA. Use Value: Enables BCM to meet ISO 16750-2 quiescent current requirements (<100 µA) during vehicle off-state. | Use Scenario: Providing isolated 12 V auxiliary supply for torque sensor interface and motor phase current sensing amplifiers. IC Role / Device Role / Timing Role: Secondary regulator fed from main 12 V bus; delivers clean, well-regulated 12 V output with fast load-step response. Use Value: Delivers 2.5 A peak current during steering assist events while maintaining <1% output deviation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 3.6 A output, 2.1 MHz switching, requires external compensation; no forced PWM mode. | Better suited for space-constrained designs needing higher frequency and smaller magnetics. | Select if board area is critical and EMI filtering can accommodate 2.1 MHz harmonics. |
| MPQ4332GQ-AEC1 | 3 A output, 2.2 MHz, integrated compensation, but only AEC-Q100 Grade 2 (−40 °C to +105 °C). | Limited to cabin or non-under-hood locations due to lower max junction temperature. | Choose for cost-sensitive cabin modules where thermal margin is less demanding. |
Compared with LM61480QRTWRQ1 and MPQ4332GQ-AEC1, the NCV8842PWG offers superior thermal ruggedness for under-hood deployment, fixed-frequency predictability for EMI control, and integrated fault handling without external components-making it optimal for mission-critical power nodes in engine and chassis domains.
Availability
NCV8842PWG is available at Aetrix Electronics and suitable for automotive power management, ADAS domain controllers, and body electronics requiring stable component supply with full AEC-Q100 compliance and long-term lifecycle support.
Supply support for NCV8842PWG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8842PWG belongs to onsemi's automotive-qualified DC-DC converter portfolio, designed specifically for robust, high-reliability power conversion in engine control, chassis, and ADAS systems operating across extreme automotive temperature and voltage transients.
FAQ
What is the maximum recommended output current for the NCV8842PWG?
The NCV8842PWG is rated for 2.5 A continuous output current under typical thermal conditions (TA = 25 °C, 4-layer PCB with 2 oz copper and 1 in² thermal pad). Derating is required above 85 °C ambient; full 2.5 A is guaranteed up to TJ = 125 °C with proper heatsinking. The NCV8842PWG includes cycle-by-cycle current limiting that clamps peak inductor current to protect against short-circuit faults.
Does the NCV8842PWG support adjustable switching frequency?
No, the NCV8842PWG operates at a fixed 200 kHz switching frequency. This simplifies EMI filter design and ensures predictable noise spectra for automotive EMC compliance. Unlike programmable-frequency regulators, the NCV8842PWG does not accept external resistor or capacitor frequency-setting components-the oscillator is fully internal and trimmed during manufacturing.
Can the NCV8842PWG be used in non-automotive applications?
Yes, the NCV8842PWG can be used in industrial and harsh-environment applications requiring wide-input-range, high-reliability buck conversion. Its 4.5 V–40 V input range, 165 °C thermal shutdown, and robust protection features make it suitable for telecom power shelves, railway control units, and outdoor equipment. However, its AEC-Q100 qualification is automotive-specific; industrial users should verify long-term reliability data per JESD47.
What is the purpose of the exposed thermal pad (EP) on the NCV8842PWG package?
The exposed thermal pad (EP) on the NCV8842PWG is internally connected to GND and serves as the primary thermal conduction path from the die to the PCB. To achieve rated 2.5 A performance, the EP must be soldered to a minimum 100 mm² copper area with ≥4 thermal vias (0.3 mm diameter) connecting to inner or bottom-layer ground planes. Omitting this compromises thermal resistance and risks premature thermal shutdown under load.
How does the NCV8842PWG handle startup sequencing with other power rails?
The NCV8842PWG supports controlled startup via its EN pin and PGOOD output. Applying a delayed enable signal to EN coordinates turn-on with upstream supplies, while the open-drain PGOOD asserts after VOUT reaches ±7.5% regulation-allowing it to drive the EN pin of downstream converters or microcontroller reset circuits. This enables robust, cascaded power sequencing without external timers or supervisors, essential for complex automotive domain controllers.
NCV8842PWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tube
- 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
NCV8842PWG FAQ
1.How can I place an order for NCV8842PWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8842PWG 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 NCV8842PWG reliable?
The price and inventory of NCV8842PWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8842PWG is usually 5 days.
3.What payment methods are accepted for NCV8842PWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8842PWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8842PWG?
NCV8842PWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8842PWG 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 NCV8842PWG?
For technical support, including NCV8842PWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8842PWG requirements.
6.How does Aetrix verify that NCV8842PWG is sourced from the original manufacturer or authorized distributors?
All NCV8842PWG 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 NCV8842PWG meets industry standards.
7.What is the process for return or replacement of NCV8842PWG?
All NCV8842PWG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8842PWG, 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 NCV8842PWG part is unused and in its original packaging.
Return procedure for NCV8842PWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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