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onsemi NCV33063AVDR2
- Part No.:
- NCV33063AVDR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV33063AVDR2.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
NCV33063AVDR2 from onsemi is an automotive-grade monolithic DC-DC switching regulator IC supporting step-up, step-down, and inverting topologies. It integrates a temperature-compensated 1.25 V reference, comparator, oscillator with active current limit, 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 stable 5 V/500 mA or 28 V/175 mA outputs in validated reference designs.
For engineers reviewing the NCV33063AVDR2 datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, −40°C to +125°C operating range, 1.5 A internal switch, 100 kHz max switching frequency, and SOIC-8 package compatibility with legacy MC34063A designs.
Technical Context
The NCV33063AVDR2 implements a fixed-frequency, current-mode control architecture using an internal oscillator whose timing is set by an external capacitor (CT) and discharge/charge current ratio. Its Darlington output stage enables 1.5 A peak switch current with typical VCE(sat) of 1.0 V at 1.0 A, while the precision 1.25 V ±2% reference ensures accurate output voltage regulation via external resistor dividers.
It supports three fundamental converter configurations: step-up (boost), step-down (buck), and voltage-inverting (buck-boost), each requiring distinct external component arrangements-inductor placement, diode orientation, and feedback node connection-but sharing identical internal control logic, current sensing at Pin 7 (Ipk sense), and timing capacitor interface at Pin 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - Supports wide-input industrial and automotive battery systems including 12 V, 24 V, and 36 V nominal rails. |
| Output Switch Current | 1.5 A - Enables direct drive of medium-power converters without external boost transistors in most applications. |
| Reference Voltage | 1.25 V ±2% - Provides precise feedback threshold for stable output regulation across temperature and line variations. |
| Switching Frequency | Up to 100 kHz - Balances efficiency, inductor size, and EMI; adjustable via CT capacitor value (e.g., 470 pF → ~55 kHz). |
| Operating Temperature | −40°C to +125°C - Qualified per AEC-Q100 Grade 1, suitable for under-hood automotive environments. |
| Supply Current (Standby) | ≤4.0 mA - Minimizes quiescent power loss in always-on vehicle subsystems like body control modules. |
| Package | SOIC-8 (Case 751) - Standard surface-mount footprint compatible with automated assembly and thermal relief design rules. |
Pinout & Package
NCV33063AVDR2 is housed in an 8-pin SOIC package (Case 751), with exposed pad optional per DFN variant but not applicable to this SOIC-8 version. Thermal resistance RJA = 160°C/W enables operation up to +125°C junction temperature with moderate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Switch Collector | High-side collector of internal Darlington switch | Connects to inductor/diode node in boost/buck-boost; requires low-inductance routing to minimize switching noise. |
| 2 - Switch Emitter | Emitting terminal of internal Darlington switch | Return path for switch current; ties to GND in buck configuration, to input in boost/inverting topologies. |
| 3 - Timing Capacitor | Oscillator timing node | External capacitor (CT) sets switching frequency; value directly determines fosc (e.g., 1 nF ≈ 33 kHz). |
| 4 - GND | Power and signal reference ground | Must be low-impedance star point; separate analog and power ground traces recommended for stability. |
| 5 - Comparator Inverting Input | Feedback voltage input to error amplifier | Connected to resistor divider from output; compares against 1.25 V reference to regulate output voltage. |
| 6 - Ipk Sense | Current limit detection input | Voltage drop across external sense resistor (Rsc) triggers shutdown when ≥300 mV (typical). |
| 7 - Driver Collector | Driver stage collector output | Drives external NPN transistor in high-current boost configurations; not used in standard 1.5 A operation. |
| 8 - VCC | Positive supply input | Accepts 3.0–40 V; powers internal circuitry and bias network; bypass capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified with PPAP capability - meets stringent reliability and traceability requirements for automotive ECUs. |
| Integrated 1.5 A Darlington switch | Eliminates need for external power transistor in ≤1.5 A applications - reduces BOM count and layout complexity. |
| Precision 1.25 V reference | ±2% tolerance over full temperature range - enables ±1% output voltage accuracy with standard 1% resistors. |
| Adjustable switching frequency | Configurable from ~24 kHz to 100 kHz via CT capacitor - allows optimization of efficiency vs. size vs. EMI. |
| Low standby current | ≤4.0 mA supply current - supports energy-sensitive always-on functions such as CAN wake-up receivers. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V to 5 V Power Supply |
|---|---|
|
Use Scenario: Regulating 12 V/24 V vehicle battery to stable 5 V for microcontroller, CAN transceiver, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing step-down conversion with integrated switch and current limiting. Use Value: AEC-Q100 qualification and −40°C to +125°C operation ensure reliable startup and runtime performance across all vehicle environmental conditions. |
Use Scenario: Converting unregulated 24 V industrial rail to regulated 5 V for PLC I/O modules, fieldbus gateways, or HMI controllers. IC Role / Device Role / Timing Role: Monolithic buck regulator providing cost-effective, compact power conversion with minimal external parts. Use Value: 1.5 A output capability and 40 V max input tolerate brownouts and surges common in factory floor power distribution. |
| USB-C Power Adapter Auxiliary Rail | Medical Portable Device Battery Management |
|
Use Scenario: Generating isolated auxiliary 3.3 V or 5 V supply from main USB-C PD bus (5–20 V) for MCU supervision and level-shifting circuits. IC Role / Device Role / Timing Role: Step-up or step-down controller adapting variable input to fixed low-voltage rail with tight regulation. Use Value: Adjustable output via resistor divider and 1.25 V reference enables flexible voltage scaling without redesigning power stage. |
Use Scenario: Providing regulated 3.3 V from Li-ion battery (3.0–4.2 V) or 12 V backup supply in portable diagnostic equipment. IC Role / Device Role / Timing Role: Inverting or buck converter delivering low-noise, low-quiescent power for analog front-ends and data acquisition. Use Value: Low standby current (<4 mA) extends battery life during sleep modes while maintaining fast wake-up response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33063AVDR2G | Same SOIC-8 package and pinout; rated for −40°C to +85°C (not AEC-Q100). | Suitable for commercial/industrial use only; lacks automotive qualification and extended high-temp guarantee. | Select when AEC-Q100 is unnecessary and cost sensitivity outweighs temperature margin. |
| LM2574N-5.0 | Fixed 5 V output, 0.5 A switch, TO-220 package; no adjustable feedback or inverting capability. | Limited to step-down only; lower current rating requires external boost for higher loads. | Choose only for simple 5 V buck supplies where programmability and topology flexibility are not required. |
Compared with MC33063AVDR2G, the NCV33063AVDR2 offers guaranteed operation to +125°C and automotive qualification-critical for engine bay or ADAS subsystems-while LM2574N-5.0 trades versatility for simplicity and fixed-output convenience in non-automotive low-power applications.
Availability
NCV33063AVDR2 is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V power conversion, and medical portable device power management requiring stable component supply across long production lifecycles.
Supply support for NCV33063AVDR2 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV33063AVDR2 belongs to the MC33063A family of monolithic switching regulators-designed specifically for cost-sensitive, space-constrained DC-DC conversion in automotive and industrial applications where reliability and wide input range are essential.
FAQ
What is the maximum output current achievable with NCV33063AVDR2 in a step-down configuration?
The NCV33063AVDR2 supports up to 1.5 A peak switch current internally. In a well-designed step-down (buck) configuration with appropriate external components-including a low-DCR inductor, fast-recovery diode, and adequate PCB thermal relief-it reliably delivers 500 mA continuous output current, as validated in Figure 11 of the datasheet. Higher loads require external current boosting per Figures 10/12.
Does NCV33063AVDR2 support voltage-inverting (buck-boost) topology?
Yes, the NCV33063AVDR2 fully supports voltage-inverting operation, as demonstrated in Figure 13 of the official datasheet. It generates −12 V at 100 mA from a 4.5–6.0 V input using standard external components: 88 µH inductor, 1N5819 Schottky diode, and specific resistor divider values. The internal architecture inherently enables this topology without modification.
What is the purpose of Pin 7 (Driver Collector) on NCV33063AVDR2?
Pin 7 is the collector of the internal driver transistor, intended for external current boosting when load requirements exceed the 1.5 A internal switch limit. As shown in Figures 10, 12, and 14, it drives an external NPN transistor to extend peak current capability beyond 1.5 A. In standard operation with ≤1.5 A loads, Pin 7 remains unconnected or tied to VCC depending on configuration.
How does the NCV33063AVDR2 achieve current limiting?
The NCV33063AVDR2 implements cycle-by-cycle current limiting by monitoring the voltage drop across an external sense resistor (Rsc) connected between Pin 2 (Switch Emitter) and ground. When this voltage reaches approximately 300 mV (typical), the internal comparator disables the switch. This threshold is fixed and temperature-compensated, ensuring consistent overcurrent protection across the full operating range.
Is NCV33063AVDR2 pin-compatible with MC34063A?
Yes, the NCV33063AVDR2 is functionally and physically pin-compatible with MC34063A, MC33063A, and SC33063A in SOIC-8 packaging. All share identical pin assignments, electrical characteristics, and application schematics. The NCV prefix denotes automotive qualification (AEC-Q100, −40°C to +125°C), while retaining full drop-in compatibility for design migration or enhanced reliability requirements.
NCV33063AVDR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
NCV33063AVDR2 FAQ
1.How can I place an order for NCV33063AVDR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV33063AVDR2 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 NCV33063AVDR2 reliable?
The price and inventory of NCV33063AVDR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV33063AVDR2 is usually 5 days.
3.What payment methods are accepted for NCV33063AVDR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV33063AVDR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV33063AVDR2?
NCV33063AVDR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV33063AVDR2 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 NCV33063AVDR2?
For technical support, including NCV33063AVDR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV33063AVDR2 requirements.
6.How does Aetrix verify that NCV33063AVDR2 is sourced from the original manufacturer or authorized distributors?
All NCV33063AVDR2 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 NCV33063AVDR2 meets industry standards.
7.What is the process for return or replacement of NCV33063AVDR2?
All NCV33063AVDR2 units undergo pre-shipment inspection (PSI). If there is an issue with NCV33063AVDR2, 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 NCV33063AVDR2 part is unused and in its original packaging.
Return procedure for NCV33063AVDR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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