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onsemi NCV891330PD33R2G
- Part No.:
- NCV891330PD33R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV891330PD33R2G.pdf
- Description:
- IC REG BUCK 3.3V 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
NCV891330PD33R2G from onsemi is an automotive-grade dual-mode step-down regulator that operates as either a 2 MHz PWM buck converter (up to 3.0 A) or a low-noise LDO linear regulator under light load, delivering a fixed 3.3 V output. It withstands 45 V load dump, features integrated N-channel power switch, ±2% output accuracy, and includes reset functionality with noise-filtering delay for microcontroller interfacing in driver information systems.
For engineers reviewing the NCV891330PD33R2G datasheet, pinout, applications, or equivalent options, key selection considerations include its 30 µA quiescent current in low-Iq mode, VIN range of 3.7–36 V (with 45 V transient tolerance), dual-mode transition behavior, thermal shutdown at 155°C, and SOIC-8 EP package with exposed pad for thermal management.
Technical Context
The NCV891330PD33R2G implements hybrid regulation: it starts in PWM mode at power-up, then transitions to LDO mode when output current falls below ~40 mA (at typical VIN), remaining there until load exceeds 50–80 mA or VIN rises above 19 V. Its internal slope compensation prevents subharmonic oscillation with recommended 2.2–3.3 µH inductors, and frequency foldback activates above 18.4 V input to maintain stability and reduce switching losses.
Control logic integrates UVLO (4.1 V start/3.1 V stop), VIN overvoltage shutdown (36.5–39.0 V), DRV supply monitoring (2.7–3.05 V UVLO), and hiccup-mode short-circuit protection. The RSTB open-drain reset pin asserts low when VOUT drops below 2.97 V (−2.5% of 3.3 V), with 16 ms restart delay and 25 µs noise filtering-enabling direct interface with automotive microcontrollers without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V, ±2% accuracy over −40°C to +150°C junction temperature ensures stable MCU core/logic rail in automotive environments. |
| Max Output Current | 3.0 A in PWM mode; supports infotainment SoCs and display controllers without external pass devices. |
| Quiescent Current | 30 µA in light-load LDO mode enables >10-year battery standby in always-on vehicle modules. |
| Input Voltage Range | 3.7 V to 36 V continuous operation; withstands 45 V load dump transients per ISO 7637-2, eliminating need for upstream TVS clamping. |
| Switching Frequency | 2.0 MHz nominal (1.8–2.2 MHz); enables use of small 2.2 µH inductors and all-ceramic 30 µF output filter for compact EMI-optimized layout. |
| Reset Threshold | 2.97 V (−2.5%) with 17–66 mV hysteresis; provides clean, glitch-immune reset signal to microcontrollers during brownout. |
| Thermal Shutdown | Activates at 155°C, restarts at 135°C; protects against sustained overload or poor PCB heatsinking in enclosed dash modules. |
Pinout & Package
NCV891330PD33R2G uses the SOIC-8 EP (Case 751AC) package with exposed thermal pad electrically connected to Pin 4 (GND). The 8-pin layout supports high-current switching and low-noise linear operation in a space-constrained automotive footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 3.7–36 V battery input; withstands 45 V transients-connects directly to vehicle battery via minimal input capacitance. |
| DRV | Gate driver supply | Provides regulated 3.3 V to charge bootstrap capacitor; UVLO-protected to prevent shoot-through during low-VIN conditions. |
| RSTB | Open-drain reset output | Pulls low when VOUT < 2.97 V; requires external pull-up to VOUT for logic-high assertion-no external RC timing needed. |
| GND | Power and signal ground | Common return for VIN, VOUT, and thermal pad; must be low-impedance connection to minimize noise coupling into feedback path. |
| EN | Enable control | TTL-compatible; ties directly to battery for always-on operation or to MCU GPIO for controlled startup/shutdown. |
| VOUT | Regulated output & feedback | 3.3 V output node and internal feedback reference point-connects to load and external output capacitor (min. 30 µF ceramic). |
| BST | Bootstrap supply | Drives high-side N-channel switch gate above VIN; requires 0.1 µF ceramic capacitor between BST and SW pins. |
| SW | Switching node | Connects to inductor and freewheeling diode cathode; high dv/dt node requiring tight layout and ground plane clearance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode regulation | Automatically switches between high-efficiency 2 MHz PWM and ultra-low-noise LDO based on real-time load current-eliminates need for external mode control logic. |
| Integrated power switch | Internal 360 mΩ (max) N-channel MOSFET reduces BOM count and PCB area versus controller+external FET solutions. |
| Automotive-grade protection | Includes current limit (4.4 A typ), thermal shutdown (155°C), short-circuit hiccup mode, and VIN overvoltage lockout-meets AEC-Q100 stress requirements. |
| Low-noise reset function | Factory-trimmed RSTB threshold (2.97 V) with 25 µs noise filter and 16 ms restart delay enables reliable MCU reset without external supervisors. |
| High-frequency operation | 2 MHz switching allows use of 2.2 µH inductors and eliminates electrolytic capacitors-reducing solution size and improving long-term reliability. |
Applications
| Instrument Cluster Power | Safety Vision System Rail |
|---|---|
Use Scenario: Supplies 3.3 V to digital instrumentation processors and TFT LCD bias circuits in vehicle instrument clusters. IC Role / Device Role / Timing Role: Primary DC-DC regulator providing stable, low-noise 3.3 V rail with fast transient response to handle burst-mode display updates. Use Value: Dual-mode operation maintains <30 µA quiescent current during vehicle sleep mode while delivering 3 A peak for cluster animation sequences. | Use Scenario: Powers image signal processors and CMOS sensors in rear-view and surround-view camera modules. IC Role / Device Role / Timing Role: Main power stage converting battery voltage to clean 3.3 V for sensor analog front-end and ISP core logic. Use Value: Withstands 45 V load dump without external protection, and 2 MHz switching minimizes conducted EMI near sensitive video signal paths. |
| Infotainment Head Unit Core | Driver Information Display |
Use Scenario: Generates 3.3 V for application processors, audio codecs, and touch controller ICs in central infotainment units. IC Role / Device Role / Timing Role: High-current buck-LDO hybrid regulator supporting both active navigation rendering and low-power voice-wake states. Use Value: Seamless mode transition (<2 µs) prevents voltage droop during sudden load changes, ensuring uninterrupted audio playback and UI responsiveness. | Use Scenario: Provides regulated 3.3 V to OLED/LCD display drivers and ambient light sensor interfaces in HUD and digital cockpit displays. IC Role / Device Role / Timing Role: Low-noise LDO mode suppresses switching ripple that could cause visible banding or flicker in high-contrast displays. Use Value: RSTB reset signal synchronizes display initialization with MCU boot sequence, eliminating black-screen startup artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-mode automotive regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV891330PD50R2G | Identical architecture and package, but fixed 5.0 V output (±2%); same 30 µA Iq, 2 MHz switching, and protection features. | Used where 5 V logic rails or legacy MCU peripherals require non-3.3 V supply-no change to PCB layout or thermal design required. | Select when system requires 5.0 V instead of 3.3 V; pinout, footprint, and thermal performance are identical. |
| TPS62130AQDGQRQ1 | Single-mode 3 A buck only (no LDO mode); 2.5 MHz switching; 17 µA Iq in full shutdown but no low-Iq active mode; no integrated reset. | Suitable for higher-efficiency constant-load applications where ultra-low sleep current is not required-lacks automotive reset and dual-mode flexibility. | Choose for cost-sensitive designs needing only PWM regulation and where external reset supervisor is acceptable. |
Compared with NCV891330PD33R2G, the NCV891330PD50R2G offers identical performance in every aspect except output voltage, enabling drop-in replacement for 5 V systems; the TPS62130AQDGQRQ1 delivers higher switching frequency and lower shutdown current but lacks the critical low-noise LDO mode and integrated reset needed for automotive infotainment sleep/wake cycles.
Availability
NCV891330PD33R2G is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and safety vision systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV891330PD33R2G 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, and cloud power applications.
The NCV891330PD33R2G belongs to onsemi's automotive power management portfolio, designed specifically for battery-connected ADAS and infotainment subsystems demanding ultra-low quiescent current, high transient immunity, and AEC-Q100 qualification.
FAQ
What is the guaranteed output voltage accuracy of the NCV891330PD33R2G over temperature?
The NCV891330PD33R2G guarantees ±2% output voltage accuracy across its full operating junction temperature range of −40°C to +150°C. This is confirmed in Table 3 of the datasheet under "Output Voltage during regulation" for the 3.3 V option, with min/max values of 3.234 V and 3.366 V at 25°C, and validated over temperature by design and characterization testing.
Does the NCV891330PD33R2G require an external bootstrap capacitor, and what value is recommended?
Yes, the NCV891330PD33R2G requires an external ceramic bootstrap capacitor between BST and SW pins. The datasheet specifies a value of 0.1 µF (100 nF) in Table 3 test conditions and Figure 1. This capacitor ensures proper gate drive voltage for the internal N-channel power switch and must be placed close to the BST/SW pins to minimize loop inductance.
How does the NCV891330PD33R2G behave during automotive load dump events?
The NCV891330PD33R2G withstands input transients up to 45 V per ISO 7637-2 without damage or regulation loss. Its absolute maximum VIN rating is 45 V (Table 2), and internal protection circuitry-including VIN overvoltage shutdown (36.5–39.0 V threshold)-ensures safe operation. No external TVS diode is required for standard load dump compliance.
What is the minimum output capacitor value required for stable operation of the NCV891330PD33R2G?
The NCV891330PD33R2G requires a minimum 30 µF ceramic output capacitor, as specified in the "Recommended conditions and components" section on page 13 of the datasheet. This value ensures sufficient phase margin (>50°) and stable regulation with the internal compensation network when used with a 2.2 µH inductor and 3.3 V output.
Can the NCV891330PD33R2G be used with a 5 V input supply, and what is its minimum operating voltage?
Yes, the NCV891330PD33R2G operates down to 3.7 V input, making it fully compatible with 5 V supplies. Its undervoltage lockout (UVLO) starts at 4.1 V (rising) and stops at 3.1 V (falling), so it remains enabled across the full 5 V ±10% range. At 5 V input, it functions in PWM mode for loads above ~40 mA and transitions to LDO mode at lighter loads.
NCV891330PD33R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.7V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- 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-SOIC-EP
NCV891330PD33R2G FAQ
1.How can I place an order for NCV891330PD33R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV891330PD33R2G 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 NCV891330PD33R2G reliable?
The price and inventory of NCV891330PD33R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV891330PD33R2G is usually 5 days.
3.What payment methods are accepted for NCV891330PD33R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV891330PD33R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV891330PD33R2G?
NCV891330PD33R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV891330PD33R2G 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 NCV891330PD33R2G?
For technical support, including NCV891330PD33R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV891330PD33R2G requirements.
6.How does Aetrix verify that NCV891330PD33R2G is sourced from the original manufacturer or authorized distributors?
All NCV891330PD33R2G 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 NCV891330PD33R2G meets industry standards.
7.What is the process for return or replacement of NCV891330PD33R2G?
All NCV891330PD33R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV891330PD33R2G, 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 NCV891330PD33R2G part is unused and in its original packaging.
Return procedure for NCV891330PD33R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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