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onsemi NCV890430MW50TXG
- Part No.:
- NCV890430MW50TXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCV890430MW50TXG.pdf
- Description:
- IC REG BCK PWM SIGNAL 600MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
NCV890430MW50TXG 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. It integrates P-channel (550 mΩ) and N-channel (300 mΩ) power switches and features reset with adjustable delay, high-voltage enable, and synchronization input - designed for infotainment, instrumentation, and rear-view camera power rails.
For engineers reviewing the NCV890430MW50TXG datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, 45 V load dump tolerance, low shutdown current (<10 µA), DFN8 wettable flanks package, and VIN frequency foldback behavior above 18 V.
Technical Context
The NCV890430MW50TXG employs current-mode control with fixed internal compensation and a P-channel high-side switch enabling 100% duty cycle operation for ultra-low dropout performance near VOUT. Its UVLO (4.1 V start / 3.2 V stop) and overvoltage protection (37 V shutdown threshold) ensure robustness in automotive battery environments.
It supports external synchronization from 1.8–2.5 MHz, includes slope compensation to prevent subharmonic oscillation, and implements dual-stage short-circuit protection: frequency foldback down to 450 kHz and hiccup mode at 32 kHz. Thermal shutdown activates at 155 °C with 5 °C hysteresis.
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 - sufficient for powering DSPs, image sensors, and display controllers in automotive cameras. |
| Input Voltage Range | 3.5 V to 37 V - covers cold-crank (≥3.5 V), nominal 12 V/24 V, and load dump transients (withstands 45 V). |
| Switching Frequency | 2.0 MHz (typ) - enables compact 2.2 µH inductor and all-ceramic filter design; folds back to 1.0 MHz above 18 V VIN. |
| Shutdown Current | <10 µA - meets automotive "always-on" module quiescent power requirements. |
| Duty Cycle Capability | 100% - maintains regulation down to VIN ≈ VOUT + dropout losses, critical for low-input scenarios. |
| Reset Accuracy | 91–97% of VOUT with 0.5% hysteresis - provides precise power-good signaling for microcontroller boot sequencing. |
Pinout & Package
NCV890430MW50TXG is housed in a thermally enhanced DFN8 (3 mm × 3 mm, 0.65 mm pitch) package with wettable flanks (JEDEC MO-220 compliant) and an exposed thermal pad (EPAD) requiring direct connection to GND and low-thermal-resistance PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Power input | Battery-connected input; requires local ceramic capacitor; withstands 45 V transient. |
| 2 RSTB | Open-drain reset flag | Pulled low when VOUT drops below 91–97% of nominal; delay set by external pull-up current (100 µA–1 mA). |
| 3 GND | Analog ground reference | Must tie directly to EPAD and output capacitor ground to minimize noise coupling into error amplifier. |
| 4 EN | Enable control | High-voltage tolerant (up to 40 V); logic-high ≥2.0 V enables regulator; logic-low ≤0.8 V forces <10 µA shutdown. |
| 5 VOUT | Regulated output | Fixed 5.0 V output; senses feedback internally; connects to output capacitor and load. |
| 6 SYNC | External clock input | Accepts 1.8–2.5 MHz square wave; rising edge triggers switch turn-on; no external pull-down required. |
| 7 PGND | Power ground return | Carries high di/dt switching current; must connect directly to input capacitor ground and EPAD. |
| 8 SW | Switching node | Connects to inductor; experiences full VIN-to-GND swing; layout critical for EMI and efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-channel power switches | 550 mΩ HS / 300 mΩ LS MOSFETs eliminate external FETs and bootstrap components, reducing BOM count and board area. |
| 100% duty cycle operation | Enables regulation during cold-crank (VIN ≈ 4–5 V) without dropout, preserving system functionality where input approaches output voltage. |
| AEC-Q100 qualified (Grade 1) | Rated for −40 °C to +125 °C ambient operation with PPAP documentation support - meets OEM automotive qualification requirements. |
| Load dump survivability | Withstands 45 V transients per ISO 7637-2 Pulse 5a, eliminating need for upstream TVS in many body electronics applications. |
| Synchronization input | Allows multiple NCV890430MW50TXG units to operate at identical phase, reducing conducted EMI peaks in multi-rail systems. |
Applications
| Automotive Infotainment Power | Rear-View Camera Module |
|---|---|
|
Use Scenario: Powering audio DSPs, touch controller SoCs, and display drivers in head units under wide battery voltage variation including cold-crank and load dump. IC Role / Device Role / Timing Role: Primary 5 V synchronous buck regulator supplying core logic rails with tight voltage tolerance and low noise. Use Value: 2 MHz operation minimizes inductor size; 100% duty cycle sustains output during 4.5 V cold-crank; ±2% accuracy ensures reliable digital logic operation. |
Use Scenario: Providing clean, regulated 5 V to CMOS image sensors, ISP processors, and video encoders in backup camera modules mounted in vehicle bumpers. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down converter replacing linear regulators to reduce thermal load in sealed housings. Use Value: DFN8 wettable flanks enable automated optical inspection (AOI); <10 µA shutdown current extends battery life during vehicle sleep mode. |
| Instrument Cluster Display Supply | Body Control Module Sub-Rail |
|
Use Scenario: Generating stable 5 V for TFT-LCD controllers and microcontrollers in digital instrument clusters exposed to engine bay temperature extremes. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC converter with thermal shutdown (155 °C) and hysteresis (5 °C) for safe fault recovery. Use Value: AEC-Q100 Grade 1 rating guarantees operation to +125 °C ambient; exposed pad ensures efficient heat transfer to PCB for sustained 0.6 A loads. |
Use Scenario: Replacing inefficient 7805-style linear regulators in door modules, seat controls, or lighting nodes to meet OEM power budget targets. IC Role / Device Role / Timing Role: High-voltage enable (EN) allows direct connection to battery or MCU GPIO without level-shifting circuitry. Use Value: High-voltage EN simplifies interface to 12 V systems; RSTB pin provides configurable reset signal for MCU watchdog coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543320RTWR | 3.5–18 V input, 3 A output, 2.2 MHz, integrated FETs but no 100% duty cycle or load dump tolerance. | Targeted at non-automotive industrial/compute rails; lacks AEC-Q100 qualification and 45 V transient rating. | Select when higher current (3 A) and tighter output ripple are needed, and automotive transients are not present. |
| MPQ4332GQ-AEC1-Z | 3.3–36 V input, 2 A output, 2.2 MHz, AEC-Q100 Grade 1, but no RSTB pin or adjustable reset delay. | Used in ADAS domain controllers; missing dedicated reset flag limits use in MCU-boot-critical subsystems. | Choose for higher current demand and space-constrained layouts where reset signaling is handled externally. |
Compared with TPS543320RTWR and MPQ4332GQ-AEC1-Z, the NCV890430MW50TXG uniquely combines 100% duty cycle, 45 V load dump tolerance, adjustable RSTB delay, and DFN8 wettable flanks - making it optimal for cost-sensitive, space-constrained automotive body and infotainment rails requiring guaranteed cold-crank operation and OEM-compliant qualification.
Availability
NCV890430MW50TXG is available at Aetrix Electronics and suitable for automotive infotainment, rear-view camera modules, and instrument cluster displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV890430MW50TXG 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 NCV890430MW50TXG belongs to onsemi's automotive power management IC portfolio, engineered specifically for battery-connected, high-reliability DC-DC conversion in harsh vehicular environments with stringent AEC-Q100 and ISO 16750 compliance requirements.
FAQ
What is the output voltage tolerance of the NCV890430MW50TXG?
NCV890430MW50TXG delivers a fixed 5.0 V output with ±2% accuracy across temperature (−40 °C to +150 °C junction), line (3.5–37 V VIN), and load (100 µA–0.6 A). This tolerance is guaranteed by test and applies during normal regulation - not during dropout or fault conditions. The ±2% specification ensures compatibility with standard 5 V logic interfaces without external trimming.
Does the NCV890430MW50TXG support 100% duty cycle operation, and why does it matter?
Yes, the NCV890430MW50TXG supports true 100% duty cycle operation via its P-channel high-side MOSFET, enabling continuous conduction when VIN approaches VOUT. This is critical during automotive cold-crank events (e.g., VIN = 4.5 V) where conventional buck regulators drop out. The NCV890430MW50TXG maintains regulation down to VIN ≈ VOUT + ILOAD × RDS(on)_HS, extending system uptime.
How does the RSTB pin on the NCV890430MW50TXG function, and can its delay be adjusted?
The RSTB pin on the NCV890430MW50TXG is an open-drain output that pulls low when VOUT falls below 91–97% of nominal 5.0 V. Delay time is set by external current into the pin (via resistor to VOUT): 1 mA yields ~2.5 ms delay, 100 µA yields ~25 ms. Using 1 mA effectively disables delay, converting RSTB into a power-good signal. The NCV890430MW50TXG datasheet provides exact equations and measured delay tables for 5 V and 3.3 V variants.
What protection features are built into the NCV890430MW50TXG?
The NCV890430MW50TXG integrates current limit (1.5–1.9 A), short-circuit foldback (down to 450 kHz), hiccup mode (32 kHz), thermal shutdown (155 °C activation), UVLO (4.1 V start), overvoltage shutdown (37 V), and VIN frequency foldback (above 18 V). These protections operate autonomously without external components - ensuring robust operation in automotive environments with unpredictable load and supply conditions.
Is the NCV890430MW50TXG pin-compatible with other devices in the NCV8904xx family?
No, the NCV890430MW50TXG is not pin-compatible with other NCV8904xx variants such as NCV890430MW33TXG. While both share the same DFN8 package and pinout, the 5.0 V and 3.3 V versions differ only in internal feedback ratio - meaning they are electrically interchangeable *only* if the target application requires exactly 5.0 V output. Swapping them changes output voltage and may damage downstream 3.3 V logic.
NCV890430MW50TXG 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:
- PWM Signal
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 37V
- Voltage - Output (Min/Fixed):
- 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)
NCV890430MW50TXG FAQ
1.How can I place an order for NCV890430MW50TXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV890430MW50TXG 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 NCV890430MW50TXG reliable?
The price and inventory of NCV890430MW50TXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV890430MW50TXG is usually 5 days.
3.What payment methods are accepted for NCV890430MW50TXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV890430MW50TXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV890430MW50TXG?
NCV890430MW50TXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV890430MW50TXG 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 NCV890430MW50TXG?
For technical support, including NCV890430MW50TXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV890430MW50TXG requirements.
6.How does Aetrix verify that NCV890430MW50TXG is sourced from the original manufacturer or authorized distributors?
All NCV890430MW50TXG 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 NCV890430MW50TXG meets industry standards.
7.What is the process for return or replacement of NCV890430MW50TXG?
All NCV890430MW50TXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV890430MW50TXG, 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 NCV890430MW50TXG part is unused and in its original packaging.
Return procedure for NCV890430MW50TXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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