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onsemi NCV890430MW25TXG
- Part No.:
- NCV890430MW25TXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCV890430MW25TXG.pdf
- Description:
- IC REG BCK PWM SIGNAL 600MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,002
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Product details
Overview
NCV890430MW25TXG from onsemi is an automotive-grade synchronous buck regulator delivering fixed 5.0 V output at up to 0.6 A, operating from 3.5 V to 37 V input with 100% duty cycle capability, 2 MHz switching frequency, and ±2% output voltage accuracy - designed for low-noise infotainment power rails in battery-connected vehicle systems.
For engineers reviewing the NCV890430MW25TXG datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, wettable-flank DFN8 package, high-voltage enable input (battery-tolerant), synchronization capability, and reset pin with adjustable delay for microcontroller interfacing.
Technical Context
The NCV890430MW25TXG implements current-mode control with internal P-channel (550 mΩ) and N-channel (300 mΩ) power switches, enabling 100% duty cycle operation for ultra-low dropout during cold-crank conditions. Its UVLO (4.1 V start / 3.2 V stop) and overvoltage shutdown (37 V stop) ensure robustness against automotive transients including load dump up to 45 V.
It features VIN-dependent frequency foldback (switching drops to ~1 MHz above 18 V), hiccup-mode short-circuit protection, thermal shutdown (155 °C activation), and slope compensation optimized for inductors ≥1.8 µH. The RSTB pin provides open-drain reset reporting with noise filtering and user-adjustable delay via external resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures stable MCU/SoC core rail without external feedback network. |
| Max Output Current | ≥0.6 A DC - supports moderate-power infotainment modules like display controllers or camera ISPs. |
| Input Voltage Range | 3.5 V to 37 V - covers full automotive battery range including cold-crank (down to ~3.5 V) and load dump (withstands 45 V). |
| Switching Frequency | 2 MHz (typical), folds to ~1 MHz above 18 V - enables compact LC filter design while reducing switching loss at high VIN. |
| Shutdown Current | <10 µA - meets automotive standby power requirements for always-on subsystems. |
| Duty Cycle Capability | 100% - maintains regulation down to VIN ≈ VOUT, critical for low-input-voltage operation during engine cranking. |
| Reset Delay | Adjustable (1–29 ms) via RSTB pull-up current - simplifies microcontroller reset timing without external timers. |
| Package | DFN8 (3 mm × 3 mm, 0.65 mm pitch) with wettable flanks - supports automated optical inspection (AOI) and reliable solder joint formation. |
Pinout & Package
NCV890430MW25TXG uses a thermally enhanced DFN8 package (Case 506BY, 3 mm × 3 mm, 0.65 mm pitch) with exposed pad (EPAD) requiring direct connection to GND and low-thermal-resistance PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power input | Battery-supply input (3.5–37 V); requires local ceramic input capacitor for EMI suppression and transient response. |
| 2 - RSTB | Open-drain reset flag | Pulled low when VOUT drops below 91–93% of nominal; delay set by external pull-up current (100 µA–1 mA). |
| 3 - GND | Analog ground reference | Must connect directly to output capacitor ground and EPAD; separates analog sensing from power return paths. |
| 4 - EN | Enable control | High-voltage tolerant (up to 40 V); logic-high (>2.0 V) enables regulator; logic-low (<0.8 V) forces sub-10 µA shutdown. |
| 5 - VOUT | Regulated output sense | Fixed 5.0 V output node; connects to output capacitor and optional RSTB pull-up resistor. |
| 6 - SYNC | External clock input | Accepts 1.8–2.5 MHz external clock; rising edge triggers switch turn-on; no external pull-down required. |
| 7 - PGND | Power ground return | High-current return path for input/output capacitors and inductor; must tie to EPAD and GND at single point. |
| 8 - SW | Switching node | Connects to inductor; carries high di/dt; requires tight layout to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty cycle operation | Enables regulation down to VIN ≈ VOUT (e.g., 5.0 V out at 5.2 V in), essential for automotive cold-crank survival. |
| Wettable-flank DFN8 package | Supports automated optical inspection (AOI) of solder joints and improves long-term reliability in thermal cycling environments. |
| Adjustable RSTB delay | Delay time (1–29 ms) set by simple resistor to VOUT - eliminates need for external timer IC or firmware delay calibration. |
| Battery-tolerant EN pin | Accepts direct connection to 12 V/24 V battery without level-shifting - reduces BOM count and layout complexity. |
| Load-dump ruggedness | Withstands 45 V transients per ISO 7637-2 Pulse 5a - eliminates need for upstream TVS in many body electronics designs. |
| Synchronization input | Allows multiple NCV890430MW25TXG regulators to operate at same frequency - reduces beat-frequency noise in multi-rail systems. |
Applications
| Automotive Infotainment Display Power | Rear View Camera Module Supply |
|---|---|
|
Use Scenario: Powering LCD display controller and touch interface in center-stack head unit under varying battery conditions (cold crank, load dump). IC Role / Device Role / Timing Role: Primary 5.0 V step-down regulator providing clean, regulated rail with fast transient response and low output ripple. Use Value: 2 MHz switching + all-ceramic filters enable <3 mm² solution size; 100% duty cycle prevents brownout during cranking. |
Use Scenario: Supplying image signal processor (ISP) and CMOS sensor in rear-view camera exposed to wide ambient temperature and vibration. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC converter delivering stable 5.0 V rail with integrated reset signaling for system-level fault detection. Use Value: AEC-Q100 qualification and −40 °C to +150 °C junction rating ensure reliability; RSTB pin simplifies MCU reset coordination. |
| Instrument Cluster Microcontroller Rail | Body Control Module Subsystem Regulator |
|
Use Scenario: Generating 5.0 V supply for cluster MCU and CAN transceiver in space-constrained instrument panel. IC Role / Device Role / Timing Role: Compact, high-efficiency buck regulator replacing linear regulator to reduce thermal load and improve efficiency. Use Value: >90% efficiency at 0.4 A (12 V → 5 V) minimizes heat dissipation; DFN8 footprint saves board area vs. SOIC alternatives. |
Use Scenario: Powering LED drivers, window motor controllers, and door module sensors in distributed body electronics architecture. IC Role / Device Role / Timing Role: Robust, low-quiescent-current regulator supporting always-on functionality with <10 µA shutdown current. Use Value: Ultra-low IQ extends battery life in parked state; EN pin allows centralized power sequencing across multiple modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130AQDGSRQ1 | 3.0 V to 28 V input, 3 MHz switching, 3.0 A output, but no 100% duty cycle or load-dump tolerance beyond 28 V. | Lacks 45 V load-dump withstand and 100% duty cycle - unsuitable for direct battery connection in 24 V commercial vehicles. | Select only if input is pre-regulated ≤28 V and cold-crank margin is not required. |
| MPQ4420AGL-AEC1 | 3.3 V to 40 V input, 2 A output, 2.2 MHz, AEC-Q100 qualified, but no adjustable RSTB delay or high-voltage EN pin. | Requires external reset circuitry and level-shifting for battery-connected EN - increases BOM and layout complexity. | Prefer when higher output current is needed and RSTB delay flexibility is not critical. |
Compared with TPS62130AQDGSRQ1 and MPQ4420AGL-AEC1, the NCV890430MW25TXG uniquely combines 45 V load-dump tolerance, 100% duty cycle, battery-tolerant EN, and programmable RSTB delay - making it optimal for direct-battery, space-constrained automotive subsystems where reliability and integration are prioritized over raw current capability.
Availability
NCV890430MW25TXG is available at Aetrix Electronics and suitable for automotive infotainment, rear-view camera modules, and instrument cluster power supplies requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for NCV890430MW25TXG 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 NCV890430MW25TXG belongs to onsemi's automotive power management portfolio, engineered specifically for battery-connected DC-DC conversion in harsh-temperature, high-transient automotive environments.
FAQ
What is the output voltage option for NCV890430MW25TXG?
The NCV890430MW25TXG delivers a fixed 5.0 V output with ±2% accuracy across temperature and load. This version is marked "MW50" in onsemi's ordering nomenclature; the "MW25TXG" suffix confirms the DFN8 package, tape-and-reel packaging, and Pb-free construction. It does not support adjustable output or other voltage variants - only 5.0 V and 3.3 V versions exist in the NCV890430 family.
Does NCV890430MW25TXG support 100% duty cycle operation, and why does it matter?
Yes, the NCV890430MW25TXG supports true 100% duty cycle operation using its internal P-channel high-side MOSFET. This allows the regulator to maintain regulation even when input voltage drops close to the output voltage - a critical feature during automotive cold-crank events where battery voltage can fall to ~3.5 V. Without this capability, the output would collapse before reaching the UVLO threshold.
How is the reset delay configured on NCV890430MW25TXG?
The reset delay on NCV890430MW25TXG is set by the current injected into the RSTB pin via an external pull-up resistor to VOUT. Using Equation 1 from the datasheet (tdelay = 2500 / IRSTB), a 10 kΩ resistor at 5.0 V yields ~1 mA and near-zero delay ("power good" mode), while a 20 kΩ resistor gives ~0.5 mA and ~5 ms delay. The NCV890430MW25TXG datasheet specifies measured delays from 1 ms to 29 ms depending on resistor value and output voltage.
Can NCV890430MW25TXG be synchronized to an external clock, and what are the valid frequency ranges?
Yes, the NCV890430MW25TXG accepts an external clock on its SYNC pin to synchronize switching. Valid input frequencies range from 1.8 MHz to 2.5 MHz, with guaranteed operation at 90% and 10% duty cycles per Figure 6 and Figure 7. The part automatically reverts to its internal 2 MHz oscillator within 650 ns (master reassertion time) if the SYNC signal is lost - ensuring uninterrupted operation during clock source transitions.
What thermal and protection features does NCV890430MW25TXG include?
The NCV890430MW25TXG integrates thermal shutdown (activation at 155 °C, hysteresis 5–20 °C), cycle-by-cycle current limiting (1.5–1.9 A peak), hiccup-mode short-circuit protection, input overvoltage shutdown (37 V stop), and undervoltage lockout (4.1 V start / 3.2 V stop). These protections are fully autonomous and require no external components - ensuring safe operation during fault conditions without host MCU intervention.
NCV890430MW25TXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- PWM Signal
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 37V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
NCV890430MW25TXG FAQ
1.How can I place an order for NCV890430MW25TXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890430MW25TXG 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 NCV890430MW25TXG reliable?
The price and inventory of NCV890430MW25TXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890430MW25TXG is usually 5 days.
3.What payment methods are accepted for NCV890430MW25TXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890430MW25TXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890430MW25TXG?
NCV890430MW25TXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890430MW25TXG 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 NCV890430MW25TXG?
For technical support, including NCV890430MW25TXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890430MW25TXG requirements.
6.How does Aetrix verify that NCV890430MW25TXG is sourced from the original manufacturer or authorized distributors?
All NCV890430MW25TXG 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 NCV890430MW25TXG meets industry standards.
7.What is the process for return or replacement of NCV890430MW25TXG?
All NCV890430MW25TXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV890430MW25TXG, 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 NCV890430MW25TXG part is unused and in its original packaging.
Return procedure for NCV890430MW25TXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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