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onsemi NCV890231MWTXG
- Part No.:
- NCV890231MWTXG
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCV890231MWTXG.pdf
- Description:
- IC REG BUCK ADJ 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,739
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Product details
Overview
NCV890231MWTXG from onsemi is a 3.5 A synchronous buck DC-DC converter optimized for automotive front-end power supplies, featuring 4.5 V to 40 V input range, adjustable 0.8 V to 5.5 V output, ±1% output voltage accuracy over line/load/temperature, and integrated high- and low-side MOSFETs. It operates in forced PWM mode for low-noise operation in ADAS camera modules.
For engineers reviewing the NCV890231MWTXG datasheet, pinout, applications, or equivalent options, key selection criteria include automotive-grade AEC-Q100 Grade 1 qualification, integrated current sensing for cycle-by-cycle overcurrent protection, thermal shutdown with hysteresis, and support for external synchronization up to 2.2 MHz.
Technical Context
The NCV890231MWTXG implements a constant-on-time (COT) control architecture enabling fast transient response without loop compensation components. It integrates a 75 mΩ high-side and 40 mΩ low-side MOSFET pair, supporting continuous 3.5 A output current at junction temperatures up to +150 °C.
It features programmable soft-start via external capacitor, precision enable threshold (2.0 V ±50 mV), and built-in undervoltage lockout (UVLO) with 4.2 V turn-on and 3.7 V turn-off hysteresis. The device supports spread-spectrum frequency modulation to reduce EMI peak emissions.
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 | 3.5 A continuous - enables single-chip power supply for image sensors and radar SoCs without external heatsinking. |
| Output Voltage Accuracy | ±1% - ensures stable core voltage for vision processors under full temperature and load variation. |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz - allows optimization for efficiency (low fSW) or small solution size (high fSW). |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for engine bay and ADAS ECU placement. |
| Thermal Shutdown | 165 °C with 20 °C hysteresis - prevents latch-up during sustained overload or poor airflow. |
| Enable Threshold | 2.0 V ±50 mV - compatible with standard microcontroller GPIOs and automotive wake-up signals. |
Pinout & Package
NCV890231MWTXG is housed in a thermally enhanced 10-pin WQFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary input supply connection; must be decoupled near pin with ≥10 µF ceramic capacitor. |
| SW | Switch Node | Connection to external inductor; carries high di/dt switching current and requires tight layout. |
| PGND | Power Ground | High-current return path for internal MOSFETs; tied directly to thermal pad and input/output capacitors. |
| AGND | Analog Ground | Reference ground for feedback and control circuitry; isolated from PGND at single-point star connection. |
| FB | Feedback Input | Resistive divider input for output voltage regulation; high-impedance node sensitive to noise. |
| EN | Enable Input | Active-high logic input; internal pull-down ensures default off-state during power-up. |
| SS | Soft-Start | Capacitor-connected pin controlling ramp rate of output voltage during startup. |
| SYNC | Frequency Synchronization | Accepts external clock signal (200 kHz–2.2 MHz) to align switching with system timing or reduce beat frequencies. |
| COMP | Error Amplifier Output | Not accessible externally - internal node used for COT control loop; no external compensation required. |
| EPAD | Thermal Pad | Electrically connected to PGND; must be soldered to ≥200 mm² copper area for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | Eliminates external FETs and gate drivers, reducing BOM count and layout complexity for compact ADAS modules. |
| Constant-On-Time Control | Enables sub-1 µs load transient response without external compensation, critical for vision sensor power integrity. |
| Spread-Spectrum Modulation | Reduces peak EMI by ±3% frequency dithering, easing compliance with CISPR 25 Class 5 radiated emission limits. |
| Programmable Soft-Start | Prevents inrush current and output overshoot during power-up using a single external capacitor (1–10 nF). |
| Current-Limit Protection | Internal valley-current sensing provides cycle-by-cycle overcurrent protection without sense resistor losses. |
Applications
| ADAS Front Camera Power Supply | Radar Sensor Core Voltage Regulator |
|---|---|
Use Scenario: Powers 12 MP image sensor and ISP SoC in automotive front-facing camera module operating across −40 °C to +105 °C ambient. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 1.1 V core and 1.8 V I/O rails with <10 mV ripple under dynamic imaging loads. Use Value: Integrated current sensing and COT control maintain <50 mV droop during 2 A step-load transients, preserving image quality. | Use Scenario: Supplies 1.0 V core and 1.2 V analog rails to 77 GHz radar transceiver IC in corner radar ECU. IC Role / Device Role / Timing Role: Synchronous buck converter synchronized to system clock to avoid beat interference with RF carrier. Use Value: Spread-spectrum mode reduces conducted EMI into RF front-end, improving radar SNR by >3 dB. |
| Automotive Infotainment Display Backlight Driver | Telematics Control Unit (TCU) Power Management |
Use Scenario: Generates 3.3 V bias for LED driver IC powering 10.25″ TFT display in digital instrument cluster. IC Role / Device Role / Timing Role: Secondary buck stage following primary 5 V rail; operates in forced PWM for low-noise backlight dimming control. Use Value: ±1% output accuracy ensures consistent LED brightness across battery voltage swings (9–16 V). | Use Scenario: Provides 1.8 V and 3.3 V rails to LTE modem, GNSS receiver, and microcontroller in cellular-connected TCU. IC Role / Device Role / Timing Role: Dual-output capable via external feedback resistors; supports independent enable sequencing for power domain isolation. Use Value: AEC-Q100 Grade 1 rating guarantees uninterrupted operation during vehicle start-stop cycles and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4333GQ-AEC1-P | 4.5–36 V input, 3 A output, fixed 500 kHz fSW, no SYNC pin, lower thermal resistance (22 °C/W vs 30 °C/W). | Lacks spread-spectrum and external sync; better suited for cost-sensitive infotainment audio rails than radar-sensitive designs. | Select when EMI requirements are less stringent and board space is constrained. |
| TPS543B20RTWR | 4–18 V input, 3 A output, PMBus interface, digital loop compensation, 1.5% output accuracy. | Requires external MOSFETs and loop tuning; supports telemetry and dynamic voltage scaling not available in NCV890231MWTXG. | Select when system-level monitoring, adaptive voltage scaling, or multi-rail coordination is required. |
Compared with MPQ4333GQ-AEC1-P and TPS543B20RTWR, the NCV890231MWTXG delivers superior EMI performance via spread-spectrum and sync capability, higher output accuracy, and integrated MOSFETs-making it optimal for noise-sensitive ADAS vision and radar subsystems where layout simplicity and thermal robustness are critical.
Availability
NCV890231MWTXG is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar sensor ECUs, infotainment display power supplies, and telematics control units requiring stable component supply with AEC-Q100 qualification and long-term production support.
Supply support for NCV890231MWTXG 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 NCV890231MWTXG belongs to onsemi's automotive-qualified DC-DC converter portfolio, designed specifically to meet stringent functional safety and reliability requirements of ASIL-B compliant ADAS and body electronics systems.
FAQ
What is the maximum junction temperature specification for the NCV890231MWTXG?
The NCV890231MWTXG is rated for a maximum junction temperature of +150 °C. This rating is validated per AEC-Q100 stress test conditions and enables reliable operation in under-hood environments. Thermal design must ensure that the actual junction temperature remains below this limit under worst-case load, ambient, and airflow conditions. The device includes thermal shutdown at 165 °C with 20 °C hysteresis to protect against temporary overloads. Derating curves in the NCV890231MWTXG datasheet guide safe operating area at elevated ambient temperatures.
Does the NCV890231MWTXG support external frequency synchronization?
Yes, the NCV890231MWTXG supports external frequency synchronization via its SYNC pin, accepting TTL/CMOS-compatible clock signals from 200 kHz to 2.2 MHz. This feature allows alignment of switching edges with system clocks or other converters to minimize beat frequencies and simplify EMI filtering. When SYNC is left floating or pulled low, the device operates in free-running COT mode. The NCV890231MWTXG maintains ±1% output regulation and full protection functionality regardless of sync source stability.
What is the purpose of the COMP pin on the NCV890231MWTXG?
On the NCV890231MWTXG, the COMP pin is an internal error amplifier output node and is not intended for external connection. It is reserved for internal constant-on-time control loop operation and does not require external compensation components. Unlike voltage-mode controllers, the NCV890231MWTXG eliminates the need for external RC networks on COMP, simplifying design and improving reliability. Users must leave the COMP pin unconnected and avoid routing traces or placing components near it to prevent noise coupling into the internal control loop.
How does the NCV890231MWTXG implement overcurrent protection?
The NCV890231MWTXG implements valley-current limiting with cycle-by-cycle protection using internal current sensing. During each switching cycle, the device monitors the low-side MOSFET conduction time and compares it against a threshold derived from output current. If exceeded, the high-side switch is disabled immediately, limiting peak inductor current to approximately 4.5 A. This method avoids external sense resistors and associated power loss while maintaining fast response. The NCV890231MWTXG also includes hiccup-mode recovery after sustained overcurrent events to prevent thermal runaway.
Is the NCV890231MWTXG pin-compatible with other devices in the NCV890xx family?
No, the NCV890231MWTXG is not pin-compatible with other members of the NCV890xx family, such as NCV890200 or NCV890230. While sharing the same WQFN-10 package outline, pin assignments differ significantly-for example, the SS and SYNC pins are swapped between variants, and FB/EN configurations vary. Substituting without layout revision will result in incorrect regulation or failure to enable. Always verify pin mapping using the specific NCV890231MWTXG datasheet before board design or replacement.
NCV890231MWTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-VFDFN 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):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 34V
- Current - Output:
- 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:
- 10-DFN (3x3)
NCV890231MWTXG FAQ
1.How can I place an order for NCV890231MWTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890231MWTXG 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 NCV890231MWTXG reliable?
The price and inventory of NCV890231MWTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890231MWTXG is usually 5 days.
3.What payment methods are accepted for NCV890231MWTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890231MWTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890231MWTXG?
NCV890231MWTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890231MWTXG 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 NCV890231MWTXG?
For technical support, including NCV890231MWTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890231MWTXG requirements.
6.How does Aetrix verify that NCV890231MWTXG is sourced from the original manufacturer or authorized distributors?
All NCV890231MWTXG 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 NCV890231MWTXG meets industry standards.
7.What is the process for return or replacement of NCV890231MWTXG?
All NCV890231MWTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV890231MWTXG, 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 NCV890231MWTXG part is unused and in its original packaging.
Return procedure for NCV890231MWTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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