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onsemi NCV890204MWR2G
- Part No.:
- NCV890204MWR2G
- Manufacturer:
- onsemi
- Package:
- 12-VDFN Exposed Pad
- Datasheet:
-
NCV890204MWR2G.pdf
- Description:
- IC REG BUCK ADJ 2A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,988
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Product details
Overview
NCV890204MWR2G from onsemi is an automotive-grade, fixed-frequency buck switching regulator with integrated N-channel power switch, 2 MHz nominal switching frequency, adjustable spread spectrum, and programmable reset delay. It operates from 4.5 V to 36 V input, delivers up to 2.0 A output current, and regulates down to 0.8 V - designed for low-noise, space-constrained driver information systems.
For engineers reviewing the NCV890204MWR2G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed automotive protection features (load dump tolerance, thermal shutdown, short-circuit foldback), and real-world design implications of its 2 MHz operation, wettable flanks DFN package, and adjustable RSTB timing.
Technical Context
The NCV890204MWR2G uses current-mode control with internal slope compensation optimized for a 4.7 µH inductor, enabling stable operation above 50% duty cycle without subharmonic oscillation. Its oscillator supports VIN-dependent frequency foldback (2 MHz → 500 kHz) above 18.4 V to maintain regulation under high-input conditions.
It integrates a bootstrap gate driver (DRV pin), error amplifier with transconductance of 0.6–1.0 mS, and open-drain RSTB output with 92–94% output voltage threshold detection and capacitor-adjustable delay. Spread spectrum modulation is independently configured via RMOD (40–60 kHz) and RDEPTH (24–42%) resistors to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports full automotive battery range including 40 V load dump transients. |
| Output Current | 2.0 A continuous - sufficient for powering audio DSPs, display controllers, and vision system SoCs. |
| Switching Frequency | 2.0 MHz (typical) - places fundamental switching noise above AM band (1.6–3.0 MHz), eliminating need for bulky EMI filters. |
| Output Voltage Accuracy | ±1.75% - ensures tight regulation for sensitive analog subsystems like camera ISPs and audio codecs. |
| Quiescent Current (enabled) | 3 mA - enables low-power always-on functions (e.g., CAN wake-up logic) without excessive battery drain. |
| Thermal Shutdown Threshold | 150 °C - protects against sustained overload or poor PCB thermal design in enclosed automotive enclosures. |
| Package | DFN-12 (4 mm × 4 mm, wettable flanks) - supports automated optical inspection (AOI) and improves thermal dissipation vs. standard DFN. |
Pinout & Package
NCV890204MWR2G is housed in a 4 mm × 4 mm, 12-pin DFN package (Case 506CE) with exposed thermal pad connected to GND. The wettable flanks enable reliable solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply connection | Accepts 4.5–36 V battery input; requires local ceramic decoupling to suppress high-frequency ripple. |
| SW | Switching node | Connects to inductor and freewheeling diode cathode; carries high dv/dt and peak currents - layout critical for EMI control. |
| DRV | Gate driver supply output | Provides regulated ~3.3 V to charge external bootstrap capacitor (CBST); collapses below 2.7 V to disable switching. |
| RSTB | Open-drain reset output | Pulled low during UVLO, thermal shutdown, or FB < 92% of target; high-impedance after delay set by CDELAY. |
| GND | Power and signal ground reference | Must be tied to exposed pad; forms low-inductance return path for SW and DRV currents. |
| EN | Enable input | TTL-compatible; direct battery connection allowed; pulls regulator into <5 µA shutdown mode when grounded. |
| DELAY | Reset delay timing input | Capacitor-to-ground sets RSTB assertion delay; charged to 1.9 V then discharged at 4.4 µA to trigger release. |
| FB | Feedback input | Senses output via resistor divider; reference voltage = 0.8 V ±1.75%; detects precharged outputs via 20–50 mV threshold. |
| COMP | Error amplifier output | Requires external R-C network (RCOMP/CCOMP) for loop stability; transconductance = 0.6–1.0 mS. |
| RDEPTH | Spread spectrum depth adjust | Resistor-to-GND sets modulation depth (24–42%); open or short disables spread spectrum. |
| RMOD | Spread spectrum frequency adjust | Resistor-to-GND sets modulation frequency (40–60 kHz); open or short disables spread spectrum. |
| BST | Bootstrap supply input | Connected to CBST; supplies gate drive voltage >VIN to reduce RDS(on) and improve efficiency at high VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable spread spectrum | Independent RMOD/RDEPTH resistors enable precise EMI reduction tuning without sacrificing regulation accuracy. |
| Programmable reset with delay | RSTB output asserts low until output reaches 94% of target, with delay set by external capacitor - eliminates false resets during soft-start. |
| High-VIN robustness | Withstands 40 V load dump transients and operates up to 36 V - eliminates need for upstream TVS or LDO pre-regulation in 24 V systems. |
| Wettable flanks DFN | Plated pin edges enable AOI verification of solder fillets - critical for zero-defect automotive manufacturing requirements. |
| Frequency foldback protection | Automatically reduces switching frequency from 2 MHz to 500 kHz above 18.4 V input - maintains regulation while limiting peak switch stress. |
| Integrated slope compensation | Fixed ramp prevents subharmonic oscillation with 4.7 µH inductor - simplifies design and eliminates need for external compensation. |
Applications
| Audio Power Supply | Infotainment Display Backlight |
|---|---|
Use Scenario: Powering Class-D audio amplifiers and DACs in head unit systems requiring ultra-low noise and fast transient response. IC Role / Device Role / Timing Role: Primary 3.3 V/5 V buck regulator with 2 MHz switching to avoid AM band interference and minimize output filter size. Use Value: ±1.75% output accuracy and 3 mA quiescent current ensure clean audio output and low standby power consumption. |
Use Scenario: Supplying LED backlight drivers for TFT-LCD instrument clusters and center displays in vehicles. IC Role / Device Role / Timing Role: High-efficiency 5 V or 12 V step-down converter with programmable RSTB to coordinate with display power sequencing. Use Value: Adjustable RSTB delay ensures backlight enable only after main SoC rails are stable - preventing display artifacts during boot. |
| Safety Vision System Power | Instrument Cluster MCU Supply |
Use Scenario: Providing stable 1.2 V or 1.8 V core power to image signal processors (ISPs) in ADAS cameras. IC Role / Device Role / Timing Role: Secondary buck stage following a pre-regulator, delivering 2 A with tight output tolerance and thermal fault reporting. Use Value: Thermal shutdown (150 °C) and short-circuit foldback protect vision modules during prolonged exposure to engine bay temperatures. |
Use Scenario: Generating 3.3 V for microcontrollers and CAN transceivers in digital instrument clusters with strict EMC requirements. IC Role / Device Role / Timing Role: Main system rail regulator with spread spectrum enabled to meet CISPR-25 Class 5 radiated emissions limits. Use Value: 2 MHz operation + adjustable spread spectrum reduces peak EMI by >10 dBµV/m compared to fixed-frequency alternatives. |
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, 3 A output, 2.2 MHz switching, no spread spectrum, QFN-13 package | Lacks programmable RSTB and spread spectrum - requires external reset IC and additional EMI filtering for AM-band-sensitive designs | Choose for higher current needs where EMI is managed externally and reset timing is handled by system MCU. |
| TPS54202-Q1 | 42 V max input, 2 A output, 400 kHz–2.5 MHz adjustable frequency, no spread spectrum, SOIC-8 package | Higher minimum off-time limits duty cycle at low VIN; lacks wettable flanks and load-dump robustness per AEC-Q100 | Choose for cost-sensitive non-safety-critical modules where 2.5 mm × 3 mm SOIC footprint is preferred over DFN. |
Compared with MPQ4312-AEC1 and TPS54202-Q1, the NCV890204MWR2G uniquely combines AEC-Q100 qualification, wettable flanks, integrated spread spectrum, and programmable RSTB in a compact DFN - making it optimal for space-constrained, EMI-sensitive automotive infotainment and ADAS subsystems.
Availability
NCV890204MWR2G is available at Aetrix Electronics and suitable for automotive infotainment, safety vision systems, and instrument cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for NCV890204MWR2G 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 technologies for automotive, industrial, cloud, and IoT applications, with deep expertise in power management and AEC-Q100-qualified components.
The NCV890204MWR2G belongs to onsemi's automotive DC-DC converter product line, engineered specifically for low-EMI, high-reliability power conversion in driver information and ADAS systems operating across extended temperature and voltage ranges.
FAQ
What is the maximum input voltage the NCV890204MWR2G can withstand?
The NCV890204MWR2G is rated to withstand 40 V transients, including automotive load dump events, while operating continuously up to 36 V input. Its absolute maximum VIN rating is 40 V, and it incorporates built-in protection to survive these conditions without latch-up or damage when used with proper input filtering.
Does the NCV890204MWR2G require an external bootstrap capacitor?
Yes, the NCV890204MWR2G requires an external bootstrap capacitor (CBST) connected between BST and SW pins. This capacitor supplies the gate drive voltage for the internal N-channel power switch. A typical value is 0.1 µF ceramic, placed close to the BST/SW pins to minimize loop inductance and ensure reliable high-side switching.
How is the reset delay time set on the NCV890204MWR2G?
The reset delay time on the NCV890204MWR2G is set by an external capacitor (CDELAY) connected from the DELAY pin to GND. The internal 4.4 µA discharge current and 1.1 V lower threshold determine the delay; for example, a 100 pF capacitor yields ~29 ns typical delay. The RSTB pin remains low until this delay expires after output reaches 94% regulation.
What inductor value is recommended for the NCV890204MWR2G?
The NCV890204MWR2G is optimized for a 4.7 µH inductor, as its internal slope compensation is calibrated for this value. Using 4.7 µH ensures stable current-mode operation across all input/output combinations and avoids subharmonic oscillation. Inductor saturation current must exceed 3.7 A peak to accommodate the 3.25 A typical current limit.
Is the NCV890204MWR2G compatible with all-ceramic output capacitors?
Yes, the NCV890204MWR2G is fully compatible with all-ceramic output capacitors. Its current-mode architecture and internal compensation are designed to work with low-ESR ceramic capacitors - typically two 10 µF X5R/X7R devices in parallel - delivering low output ripple and excellent transient response without requiring tantalum or electrolytic types.
NCV890204MWR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 12-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:
- 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:
- 12-DFN (4x4)
NCV890204MWR2G FAQ
1.How can I place an order for NCV890204MWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890204MWR2G 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 NCV890204MWR2G reliable?
The price and inventory of NCV890204MWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890204MWR2G is usually 5 days.
3.What payment methods are accepted for NCV890204MWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890204MWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890204MWR2G?
NCV890204MWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890204MWR2G 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 NCV890204MWR2G?
For technical support, including NCV890204MWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890204MWR2G requirements.
6.How does Aetrix verify that NCV890204MWR2G is sourced from the original manufacturer or authorized distributors?
All NCV890204MWR2G 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 NCV890204MWR2G meets industry standards.
7.What is the process for return or replacement of NCV890204MWR2G?
All NCV890204MWR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV890204MWR2G, 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 NCV890204MWR2G part is unused and in its original packaging.
Return procedure for NCV890204MWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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