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onsemi NCV890101MWTXG
- Part No.:
- NCV890101MWTXG
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCV890101MWTXG.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
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Product details
Overview
NCV890101MWTXG from onsemi is an automotive-grade, monolithic buck switching regulator with internal N-channel power switch, 2 MHz fixed switching frequency, 4.5–36 V input range, and 1.2 A output capability. It delivers stable 3.3 V or 5 V outputs for driver information systems while operating above the AM band to minimize EMI filtering needs.
For engineers reviewing the NCV890101MWTXG datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 qualification, wettable flanks DFN10 package, ±1.75% output voltage tolerance, 1.4 ms soft-start, and synchronization capability across multiple units or to external clocks.
Technical Context
The NCV890101MWTXG employs current-mode PWM control with integrated slope compensation to prevent subharmonic oscillation at duty cycles >50%. Its oscillator operates at 2 MHz (4.5–18 V VIN) and folds back to 500 kHz above 18.4 V to maintain regulation under high-input conditions.
It integrates a bootstrap gate driver (DRV pin), synchronous clock interface (SYNCI/SYNCO), and robust protection including cycle-by-cycle peak current limit (1.4 A min), short-circuit foldback, thermal shutdown (150 °C activation), and undervoltage lockout (4.1–4.5 V start threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports full automotive battery range including load dump up to 40 V. |
| Output Current | 1.2 A continuous - sufficient for powering infotainment SoCs, display drivers, and vision system processors. |
| Switching Frequency | 2 MHz (typ.) - enables use of small inductors (e.g., 4.7 µH) and all-ceramic output filters without EMI filters. |
| Output Voltage Accuracy | ±1.75% - ensures tight regulation for noise-sensitive audio and ADAS sensor power rails. |
| Enable Input | TTL- and battery-compatible - allows direct connection to 12 V battery without level-shifting circuitry. |
| Thermal Shutdown | 150 °C activation with 5–20 °C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | DFN10 (3×3 mm, wettable flanks) - supports automated optical inspection (AOI) and improves thermal performance via exposed pad grounding. |
Pinout & Package
NCV890101MWTXG uses the DFN10 (Case 485C) package with wettable flanks and an exposed thermal pad connected to GND. The 10-pin top-side layout supports compact, high-density automotive PCB designs with low-inductance power paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main input supply | Accepts 4.5–36 V; requires local ceramic input capacitor for low-ESR decoupling near pin. |
| DRV (Pin 2) | Gate driver supply output | Provides regulated ~3.3 V to charge external bootstrap capacitor (CBST); UVLO thresholds at 2.7–3.05 V. |
| SYNCO (Pin 3) | Synchronization output | Open-drain signal toggling at half-switching period; used to phase-shift multiple regulators or drive SYNCI of another unit. |
| GND (Pin 4) | Power and signal ground | Reference for all analog and power circuits; exposed pad must be soldered to GND plane for thermal and noise integrity. |
| EN (Pin 5) | Enable control input | Logic-low disables regulator and reduces quiescent current to 5 µA; compatible with direct 12 V battery tie. |
| COMP (Pin 6) | Error amplifier output | Connects to external RC network (RCOMP/CCOMP) to tailor loop stability and transient response. |
| FB (Pin 7) | Feedback input | Senses output voltage via resistor divider; detects precharged outputs (>20 mV threshold) before soft-start initiation. |
| SYNCI (Pin 8) | Synchronization input | Accepts external clock (1.8–2.5 MHz) or SYNCO from master; rising edge forces immediate power switch turn-on. |
| BST (Pin 9) | Bootstrap supply input | Connects to CBST capacitor; supplies gate drive voltage >VIN to reduce RDS(on) and improve efficiency. |
| SW (Pin 10) | Switching node | Connects to inductor and freewheeling diode cathode; carries high di/dt; requires short, low-inductance trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal N-channel power switch | Eliminates external MOSFET and associated gate drive complexity; RDS(on) = 650 mΩ ensures <1 W conduction loss at 1.2 A. |
| 2 MHz free-running frequency | Enables use of 4.7 µH inductors and 2×10 µF ceramic output capacitors - reducing solution size by >40% vs. 500 kHz designs. |
| Auto-synchronization capability | Allows out-of-phase operation of multiple NCV890101MWTXG units to lower input ripple current and simplify EMI filter design. |
| Wettable flanks DFN10 package | Supports automated optical inspection of solder joints - critical for zero-defect automotive manufacturing requirements. |
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C ambient operation with PPAP documentation - meets functional safety requirements for ASIL-B systems. |
Applications
| Audio Power Supply | Infotainment Head Unit |
|---|---|
Use Scenario: Providing clean, low-noise 5 V rail to Class-D audio amplifiers and DACs in vehicle cabin audio systems. IC Role / Device Role / Timing Role: Primary DC-DC converter regulating battery input to stable 5 V output with <10 mVpp ripple using all-ceramic filtering. Use Value: 2 MHz switching avoids AM band interference; ±1.75% accuracy maintains SNR >105 dB in high-fidelity audio paths. | Use Scenario: Powering application processors, touch controllers, and display interfaces in centralized infotainment head units. IC Role / Device Role / Timing Role: High-efficiency buck regulator delivering 3.3 V @ 1.2 A with soft-start sequencing and synchronization to other power rails. Use Value: 1.4 ms soft-start prevents inrush current during cold crank; wettable flanks ensure AOI-compliant assembly for Tier-1 production. |
| Safety Vision System | Instrument Cluster Display |
Use Scenario: Supplying 3.3 V to image signal processors (ISPs) and CMOS image sensors in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Automotive-qualified buck regulator with load-dump immunity (40 V) and thermal shutdown for mission-critical vision subsystems. Use Value: Withstands 40 V transients per ISO 7637-2 Pulse 5a; AEC-Q100 Grade 1 rating supports ASIL-B functional safety compliance. | Use Scenario: Generating 5 V for TFT-LCD backlight drivers and microcontroller peripherals in digital instrument clusters. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter mounted directly behind display module with minimal board space. Use Value: DFN10 package with exposed pad achieves 50 °C/W junction-to-ambient thermal resistance; enables operation at 105 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4312-AEC1 | 40 V max input, 2.5 A output, 2.2 MHz switching, QFN12 package; no SYNCI/SYNCO pins. | Lacks synchronization capability; better suited for single-rail, higher-current applications without multi-phase coordination needs. | Select when higher output current or smaller footprint is prioritized over inter-regulator timing control. |
| TPS543B20QRGZTQ1 | 18 V max input, 3 A output, 500 kHz–2.2 MHz programmable frequency, integrated FETs, PMBus interface. | Requires external clock or configuration IC for sync; adds telemetry but increases BOM count and layout complexity. | Select when digital monitoring, dynamic frequency scaling, or tighter output margining (<±0.5%) is required. |
Compared with MPQ4312-AEC1 and TPS543B20QRGZTQ1, the NCV890101MWTXG offers native synchronization, wettable flanks for automotive AOI, and optimized 2 MHz operation for minimal passive size - making it ideal for space-constrained, multi-rail infotainment and ADAS subsystems where timing coordination and manufacturability are critical.
Availability
NCV890101MWTXG is available at Aetrix Electronics and suitable for automotive infotainment, ADAS vision systems, and digital instrument cluster designs requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for NCV890101MWTXG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with leadership in power management and analog solutions.
The NCV890101MWTXG belongs to onsemi's automotive power management portfolio, designed specifically for battery-connected, low-noise, space-constrained DC-DC conversion in driver information and safety-critical electronic systems.
FAQ
What is the maximum input voltage the NCV890101MWTXG can withstand during load dump events?
The NCV890101MWTXG is rated to withstand load dump transients up to 40 V, as specified in its Absolute Maximum Ratings table. This capability is validated per ISO 7637-2 Pulse 5a and ensures reliable operation in 12 V automotive systems during alternator disconnection events. The device remains functional without latch-up or degradation when exposed to 40 V for short durations, and its internal protection circuits remain active throughout.
Does the NCV890101MWTXG require an external bootstrap capacitor, and what is its typical value?
Yes, the NCV890101MWTXG requires an external bootstrap capacitor (CBST) connected between BST and SW pins. The recommended value is 0.1 µF ceramic, placed as close as possible to the pins. This capacitor supplies the gate drive voltage needed for the internal N-channel MOSFET during high-side switching. Proper placement and capacitance ensure stable DRV voltage and prevent bootstrap collapse under light-load skip-mode operation.
Can the NCV890101MWTXG operate with a 3.3 V output and 4.5 V input, and what is the minimum load requirement?
Yes, the NCV890101MWTXG supports 3.3 V output down to 4.5 V input, as confirmed by its UVLO start threshold (4.1–4.5 V) and regulation capability. However, due to bootstrap recharge requirements, it needs a minimum load: at 4.5 V VIN and 3.3 V VOUT, the minimum output current is ~4.2 mA (per Figure 31). Below this, skip-mode cycling may cause bootstrap voltage collapse and regulator shutdown.
How does the NCV890101MWTXG handle short-circuit conditions, and what protection mechanisms activate?
Under short-circuit, the NCV890101MWTXG first activates frequency foldback-reducing switching frequency from 2 MHz to as low as 24 kHz-to limit peak current and power dissipation. If current remains excessive, it enters hiccup mode (burst-mode recovery) with ~32 kHz switching. Thermal shutdown (150 °C) and cycle-by-cycle current limiting (1.4 A min) act concurrently to prevent damage while enabling automatic recovery once the fault clears.
Is the NCV890101MWTXG pin-compatible with other members of the NCV890 family, such as NCV890200 or NCV890230?
No, the NCV890101MWTXG is not pin-compatible with NCV890200 or NCV890230. While all share the DFN10 package and similar pin functions, their pin assignments differ-for example, NCV890200 swaps SYNCI and FB positions. Substituting without layout revision risks misconnection and failure. Always verify pin mapping using the respective datasheets before replacement or redesign.
NCV890101MWTXG 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:
- 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:
- 10-DFN (3x3)
NCV890101MWTXG FAQ
1.How can I place an order for NCV890101MWTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890101MWTXG 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 NCV890101MWTXG reliable?
The price and inventory of NCV890101MWTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890101MWTXG is usually 5 days.
3.What payment methods are accepted for NCV890101MWTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890101MWTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890101MWTXG?
NCV890101MWTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890101MWTXG 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 NCV890101MWTXG?
For technical support, including NCV890101MWTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890101MWTXG requirements.
6.How does Aetrix verify that NCV890101MWTXG is sourced from the original manufacturer or authorized distributors?
All NCV890101MWTXG 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 NCV890101MWTXG meets industry standards.
7.What is the process for return or replacement of NCV890101MWTXG?
All NCV890101MWTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV890101MWTXG, 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 NCV890101MWTXG part is unused and in its original packaging.
Return procedure for NCV890101MWTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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