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onsemi NCV33063AVDR2G
- Part No.:
- NCV33063AVDR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV33063AVDR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,792
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Product details
Overview
NCV33063AVDR2G from onsemi is an automotive-grade monolithic DC-DC switching regulator controller IC supporting buck, boost, and inverting topologies. It integrates a temperature-compensated 1.25 V reference, comparator, oscillator, current-limit circuit, driver, and 1.5 A Darlington output switch. Designed for minimal external components, it operates from 3.0 V to 40 V input and delivers adjustable output voltage with up to 100 kHz switching frequency - used in automotive body control modules, industrial power supplies, and battery-powered instrumentation.
For engineers reviewing the NCV33063AVDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, −40°C to +125°C operating range, 1.5 A internal switch current capability, 2% reference accuracy, and SOIC-8 package compatibility with legacy MC34063A designs.
Technical Context
The NCV33063AVDR2G implements a fixed-frequency, current-mode control architecture using an internal oscillator with timing capacitor (CT) programming, peak-current limiting via IPk sense voltage (250–350 mV), and a precision 1.25 V bandgap reference. Its Darlington output stage enables robust 1.5 A switching without external boost transistors in most applications.
It supports three fundamental converter configurations: step-down (buck), step-up (boost), and voltage-inverting - each requiring only four external passive components (inductor, timing capacitor, feedback resistors, and output rectifier). The device's low standby current (<4 mA) and wide input range make it suitable for unregulated 12 V/24 V automotive rails and industrial 5–40 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports direct connection to automotive battery rails including cold-crank (≥4.5 V) and load-dump (≤40 V) conditions. |
| Output Switch Current | 1.5 A - enables up to ~175 mA output at 28 V (boost) or 500 mA at 5 V (buck) without external transistor. |
| Reference Voltage | 1.25 V ±2% - sets output voltage accuracy via R1/R2 feedback divider; enables stable regulation across temperature. |
| Switching Frequency | Up to 100 kHz - determined by CT value; allows use of compact, low-cost inductors and capacitors. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and industrial control environments. |
| Current Limit Threshold | 250–350 mV at IPk sense pin - provides accurate, temperature-stable overcurrent protection without external sensing resistors. |
| Supply Current (Standby) | ≤4.0 mA - minimizes quiescent power draw in always-on systems such as telematics or sensor nodes. |
Pinout & Package
NCV33063AVDR2G is housed in an 8-pin SOIC-8 (Case 751-07) package, Pb-free and RoHS compliant, with standard 1.27 mm pitch and 5.0 mm × 4.0 mm footprint. Thermal resistance RJA = 160°C/W enables operation at full load in moderate ambient conditions with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Switch Collector) | Collector of internal Darlington switch | Connects to inductor in buck/boost/inverting topologies; handles peak currents up to 1.5 A. |
| 2 (Switch Emitter) | Emiter of internal Darlington switch | Return path for switch current; tied to GND in buck, to input in boost, or to output in inverting configuration. |
| 3 (Timing Capacitor) | Oscillator timing node | CT capacitor sets switching frequency; typical values 100 pF–1000 pF yield 30–100 kHz range. |
| 4 (GND) | Power and signal ground reference | Common return for internal circuits, feedback network, and external power components. |
| 5 (IPk Sense) | Current limit detection input | Senses voltage across external sense resistor; triggers shutdown when ≥300 mV (typical). |
| 6 (Driver Collector) | Open-collector driver output | Drives external NPN/PNP transistors for >1.5 A peak current applications (e.g., high-power boost). |
| 7 (Comparator Inverting Input) | Feedback node for output regulation | Compares divided output voltage against 1.25 V reference; sets regulated output via R1/R2 divider. |
| 8 (VCC) | Positive supply input | Accepts 3–40 V input; powers internal circuitry and charges timing capacitor; bypassed with 100 nF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified with PPAP capability - meets reliability and traceability requirements for automotive production. |
| Darlington output stage | Integrated 1.5 A switch eliminates need for external transistor in most <10 W DC-DC designs. |
| Adjustable output voltage | Set via two-resistor divider from 1.25 V reference - supports outputs from ~1.3 V to >40 V depending on topology. |
| Low-input-voltage operation | Starts regulation at 3.0 V - enables use with single Li-ion or dual NiMH batteries. |
| Thermal shutdown protection | Internal junction temperature limit at +150°C - prevents damage during overload or poor heatsinking. |
| Pb-free / RoHS compliance | Meets global environmental regulations; compatible with lead-free reflow soldering profiles. |
Applications
| Automotive Body Control Unit (BCU) | Industrial 24 V to 5 V Power Supply |
|---|---|
|
Use Scenario: Regulating 12 V battery rail to stable 5 V for microcontroller, CAN transceiver, and sensors in door module. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing buck topology with integrated switch and current limiting. Use Value: Eliminates need for external MOSFET and gate driver; AEC-Q100 rating ensures reliability over vehicle lifetime. |
Use Scenario: Converting unregulated 24 V factory bus to isolated 5 V for PLC I/O modules. IC Role / Device Role / Timing Role: Step-down controller managing inductor current, timing, and feedback loop stability. Use Value: 1.5 A internal switch supports >500 mA output; wide input range accommodates brownout and surge events. |
| Portable Medical Instrumentation | Battery-Powered Test Equipment |
|
Use Scenario: Generating −12 V from 5 V USB supply for op-amp biasing in handheld ECG front-end. IC Role / Device Role / Timing Role: Voltage-inverting regulator using transformerless topology with single inductor. Use Value: Enables bipolar supply from single-cell source; low quiescent current extends battery life between calibrations. |
Use Scenario: Boosting 3.7 V Li-ion battery to 12 V for analog signal chain and display backlight. IC Role / Device Role / Timing Role: Step-up controller managing energy transfer, duty cycle, and output ripple suppression. Use Value: 100 kHz max frequency allows small 100 µH inductors; 2% reference ensures precise 12.0 V output calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33063ADR2G | Same silicon, −40°C to +85°C operating range; non-automotive grade. | Lacks AEC-Q100 qualification and extended temperature support; unsuitable for under-hood use. | Select when cost sensitivity outweighs automotive qualification and thermal margin requirements. |
| LM2574N-5.0 | Fixed 5 V output, 0.5 A switch, 52 kHz fixed frequency, no IPk sense pin. | Not adjustable; lower current capacity; requires different compensation and layout. | Choose only for simple 5 V buck conversion where output adjustability and >0.5 A load are not required. |
Compared with MC33063ADR2G and LM2574N-5.0, the NCV33063AVDR2G uniquely combines automotive qualification, adjustable topology support, and 1.5 A integrated switching capability - making it the only option among the three for AEC-Q100-compliant, multi-topology, medium-power DC-DC designs.
Availability
NCV33063AVDR2G is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and portable instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for NCV33063AVDR2G 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 specializing in energy-efficient power management, analog, and intelligent power solutions for automotive, industrial, and cloud infrastructure markets.
The NCV33063AVDR2G belongs to the MC33063A family - a legacy but widely adopted series of monolithic DC-DC controllers designed for cost-sensitive, reliability-critical applications where simplicity, ruggedness, and wide operating range are essential.
FAQ
What is the maximum output current achievable with NCV33063AVDR2G in a buck configuration?
The NCV33063AVDR2G features a 1.5 A internal Darlington switch. In a well-designed buck converter with appropriate inductor sizing, thermal management, and input voltage ≥6 V, it reliably delivers up to 500 mA continuous output current at 5 V (as verified in Figure 11 test data). Higher loads require external transistor boosting per Figures 10/12.
Does NCV33063AVDR2G support synchronous rectification?
No, the NCV33063AVDR2G does not support synchronous rectification. It drives an external diode (e.g., 1N5819 Schottky) in all topologies. Its output stage is a Darlington BJT switch, and the controller lacks dedicated gate-drive outputs or timing logic for synchronous MOSFET control.
Can NCV33063AVDR2G be used in a flyback topology?
No, the NCV33063AVDR2G is not designed for flyback operation. Its internal switch is non-isolated and lacks primary-side sensing or transformer reset control. It supports only buck, boost, and inverting topologies using a single inductor - per datasheet Figures 9–13 and Application Notes AN920A/D and AN954/D.
What is the purpose of Pin 6 (Driver Collector) on NCV33063AVDR2G?
Pin 6 is an open-collector driver output used to interface with external NPN or PNP transistors when the internal 1.5 A switch is insufficient. As shown in Figures 10/12, it enables peak currents >1.5 A by offloading switching to an external device while retaining internal current limiting and oscillator control.
How does the NCV33063AVDR2G achieve current limiting?
The NCV33063AVDR2G implements peak-current limiting by monitoring voltage across an external sense resistor connected to Pin 5 (IPk Sense). When this voltage reaches 250–350 mV (typical 300 mV), the internal comparator disables the output switch for that cycle - providing cycle-by-cycle protection independent of output load or input voltage.
NCV33063AVDR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 33kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV33063AVDR2G FAQ
1.How can I place an order for NCV33063AVDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV33063AVDR2G 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 NCV33063AVDR2G reliable?
The price and inventory of NCV33063AVDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV33063AVDR2G is usually 5 days.
3.What payment methods are accepted for NCV33063AVDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV33063AVDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV33063AVDR2G?
NCV33063AVDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV33063AVDR2G 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 NCV33063AVDR2G?
For technical support, including NCV33063AVDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV33063AVDR2G requirements.
6.How does Aetrix verify that NCV33063AVDR2G is sourced from the original manufacturer or authorized distributors?
All NCV33063AVDR2G 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 NCV33063AVDR2G meets industry standards.
7.What is the process for return or replacement of NCV33063AVDR2G?
All NCV33063AVDR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV33063AVDR2G, 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 NCV33063AVDR2G part is unused and in its original packaging.
Return procedure for NCV33063AVDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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