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onsemi NCV890100MWTXG
- Part No.:
- NCV890100MWTXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCV890100MWTXG.pdf
- Description:
- IC REG BUCK ADJ 1.2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
NCV890100MWTXG from onsemi is an automotive-grade monolithic buck switching regulator with internal N-channel power switch, 2 MHz fixed switching frequency, 4.5 V to 36 V input range, and 1.2 A output capability. It delivers stable 3.3 V or adjustable down to 0.8 V output for driver information systems, meeting AEC-Q100 Grade 1 requirements and withstanding 40 V load dump.
For engineers reviewing the NCV890100MWTXG datasheet, pinout, applications, or equivalent options, key selection criteria include its wettable-flank DFN8 package, cycle-by-cycle current limit (1.4 A min), ±1.75% output voltage tolerance, thermal shutdown at 150 °C, and integrated soft-start (1.4 ms).
Technical Context
The NCV890100MWTXG employs current-mode control with internal slope compensation optimized for a 4.7 µH inductor, enabling stable operation above 50% duty cycle. Its oscillator maintains 2 MHz operation up to 18 V input, then folds back to ~500 kHz above 19.8 V to sustain regulation under high VIN.
Protection architecture includes short-circuit foldback (400–600 kHz), hiccup mode recovery, undervoltage lockout (4.1 V start / 3.9 V stop), and output precharge detection (35 mV threshold) that delays startup until FB discharges below VSSEN - critical for safe boot in pre-biased systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports full automotive battery range including cold-crank (4.5 V) and load dump (40 V transient) |
| Switching Frequency | 2 MHz (typ) - places fundamental switching noise above AM band (1.8 MHz min), reducing EMI filter cost |
| Output Current | 1.2 A continuous - limited by 1.4 A min cycle-by-cycle peak current and thermal design (RJA = 50 °C/W) |
| Output Voltage Accuracy | ±1.75% - ensures tight regulation for sensitive infotainment and vision system rails |
| Soft-Start Time | 1.4 ms (typ) - controls inrush current during power-up to prevent input droop or rail collapse |
| Thermal Shutdown | 150 °C activation - protects against sustained overload or poor PCB heatsinking in enclosed automotive modules |
| Enable Input Logic | TTL-compatible - allows direct connection to battery or microcontroller GPIO without level-shifting |
Pinout & Package
NCV890100MWTXG uses a wettable-flank 3 mm × 3 mm DFN8 package (Case 506BY) with exposed thermal pad connected to GND. The 0.65 mm pitch enables compact layout while supporting automated optical inspection (AOI) of solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main input supply connection | Accepts 4.5–36 V; requires local ceramic input capacitor to minimize high-frequency ripple and EMI |
| DRV (Pin 2) | Internal gate driver supply output | Provides regulated ~3.3 V to charge external bootstrap capacitor (CDRV) for high-side switch drive |
| GND (Pin 3) | Power and signal ground reference | Must be connected to exposed pad; forms low-impedance return path for SW node and thermal conduction |
| EN (Pin 4) | Enable control input | Active-high TTL logic; ties directly to battery for always-on operation or to MCU for controlled sequencing |
| COMP (Pin 5) | Error amplifier output | Interface point for external Type II compensation network (RCOMP/CCOMP) to stabilize loop response |
| FB (Pin 6) | Feedback voltage sense input | Monitors resistor divider output; detects precharged outputs via 35 mV threshold before soft-start begins |
| BST (Pin 7) | Bootstrap supply input | Connects to external bootstrap capacitor (CBST) to generate gate voltage > VIN for low RDS(on) |
| SW (Pin 8) | Power switch node | Connects to inductor and freewheeling diode cathode; carries high di/dt switching current - requires tight loop layout |
Key Features
| Feature | Design Value |
|---|---|
| Wettable Flanks DFN | Enables AOI-capable solder joint inspection on bottom terminals - critical for automotive zero-defect manufacturing |
| Load Dump Withstand | Rated for 40 V transients per ISO 7637-2 Pulse 5a - eliminates need for upstream TVS in many head unit designs |
| Frequency Foldback | Automatically reduces switching frequency from 2 MHz to 500 kHz above 19.8 V input - sustains regulation without derating |
| Precharge Detection | Delays startup until FB < 35 mV - prevents shoot-through and uncontrolled inrush when output is pre-biased |
| AEC-Q100 Qualified | Grade 1 (−40 °C to +125 °C ambient) with PPAP support - meets functional safety requirements for ASIL-B systems |
Applications
| Audio Systems | Infotainment Head Units |
|---|---|
Use Scenario: Powering DSP, ADC, and audio codec ICs in vehicle cabin audio amplifiers. IC Role / Device Role / Timing Role: Primary 3.3 V/5 V buck converter supplying low-noise analog and digital rails. Use Value: 2 MHz switching avoids AM band interference; ±1.75% accuracy ensures consistent DAC reference stability across temperature. | Use Scenario: Generating core logic and display interface voltages in centralized infotainment platforms. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 12 V battery to 3.3 V/1.8 V for SoC I/O and memory rails. Use Value: Wettable flanks enable reliable reflow in multi-layer boards; load dump rating simplifies front-end protection design. |
| Safety Vision Systems | Digital Instrument Clusters |
Use Scenario: Supplying image sensor, ISP, and MIPI serializer in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Single-chip 3.3 V regulator powering noise-sensitive imaging signal chain components. Use Value: Low output ripple with all-ceramic filtering meets CISPR-25 Class 5 emission limits; thermal shutdown prevents field failure in sealed housings. | Use Scenario: Delivering stable 5 V and 3.3 V rails to TFT LCD controllers, touch controllers, and microcontrollers in gauge clusters. IC Role / Device Role / Timing Role: Compact, thermally robust buck regulator replacing discrete solutions in space-constrained instrument panel PCBs. Use Value: 1.4 ms soft-start prevents display flicker during ignition; EN pin enables synchronized power sequencing with MCU wake-up signals. |
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, QFN-13 package with thermal pad | Higher current and frequency; larger footprint; no precharge detection | Select when >1.2 A output or tighter EMI control is required; verify layout compatibility with 13-pin QFN |
| TPS543B20QRGZTQ1 | 18 V max input, 3 A output, 500 kHz–2.2 MHz programmable frequency, integrated MOSFETs, 16-pin QFN | Lower VIN range; higher integration; no load dump rating; requires external compensation | Choose for higher efficiency at light loads or when programmable frequency aids EMI tuning; not suitable for 24 V commercial truck systems |
Compared with MPQ4312-AEC1 and TPS543B20QRGZTQ1, the NCV890100MWTXG offers optimal balance of automotive ruggedness (40 V load dump, AEC-Q100 Grade 1), compact DFN8 footprint, and built-in precharge detection - making it preferred for cost-sensitive, space-constrained 1.2 A infotainment and vision subsystems.
Availability
NCV890100MWTXG is available at Aetrix Electronics and suitable for automotive infotainment, ADAS vision modules, and digital instrument clusters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCV890100MWTXG 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 NCV890100MWTXG belongs to onsemi's automotive power management portfolio, designed specifically for low-noise, compact DC-DC conversion in driver information and safety-critical electronic control units.
FAQ
What is the maximum input voltage the NCV890100MWTXG can withstand during load dump events?
The NCV890100MWTXG is rated to withstand 40 V transients on the VIN pin, complying with ISO 7637-2 Pulse 5a load dump requirements for 12 V automotive systems. This eliminates the need for external TVS diodes in many head unit and cluster applications, provided layout minimizes parasitic inductance on the input path. The device remains functional after such events without latch-up or parameter shift.
Does the NCV890100MWTXG support pre-biased output startup?
Yes, the NCV890100MWTXG includes output precharge detection via the FB pin. If FB voltage exceeds 35 mV at enable, soft-start is delayed until the output discharges below this threshold - preventing reverse current flow and potential damage to downstream circuitry. This behavior is confirmed in Figures 27 and 28 of the datasheet and applies across the full −40 °C to +150 °C junction temperature range.
What is the recommended inductor value for the NCV890100MWTXG and why?
The datasheet specifies 4.7 µH as the optimized inductor value for the NCV890100MWTXG. This value matches the internal slope compensation circuit, ensuring stable current-mode control across all operating conditions and preventing sub-harmonic oscillation. Using other values - especially below 4.7 µH - risks instability and increased output ripple, as detailed in Section 11 "Slope Compensation" and Figure 26.
How does the NCV890100MWTXG handle thermal overload?
When junction temperature exceeds 150 °C, the NCV890100MWTXG activates thermal shutdown: switching halts, DRV voltage collapses, and soft-start resets. Operation resumes automatically once temperature falls below 145 °C (5 °C hysteresis). This protection is independent of current limit and short-circuit foldback, providing redundant safety for sustained overloads or inadequate PCB heatsinking in enclosed automotive enclosures.
Is the NCV890100MWTXG pin-compatible with other devices in the NCV890 family?
No - the NCV890100MWTXG is not pin-compatible with other NCV890 variants (e.g., NCV890200). While all share the same DFN8 package and pinout, the NCV890200 features different current limit, frequency foldback thresholds, and compensation characteristics. Substituting without validation risks instability, overcurrent, or failure to regulate under high VIN. Always use the exact part number specified in the design.
NCV890100MWTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8-DFN (3x3)
NCV890100MWTXG FAQ
1.How can I place an order for NCV890100MWTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890100MWTXG 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 NCV890100MWTXG reliable?
The price and inventory of NCV890100MWTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890100MWTXG is usually 5 days.
3.What payment methods are accepted for NCV890100MWTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890100MWTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890100MWTXG?
NCV890100MWTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890100MWTXG 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 NCV890100MWTXG?
For technical support, including NCV890100MWTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890100MWTXG requirements.
6.How does Aetrix verify that NCV890100MWTXG is sourced from the original manufacturer or authorized distributors?
All NCV890100MWTXG 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 NCV890100MWTXG meets industry standards.
7.What is the process for return or replacement of NCV890100MWTXG?
All NCV890100MWTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV890100MWTXG, 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 NCV890100MWTXG part is unused and in its original packaging.
Return procedure for NCV890100MWTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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