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onsemi MC33063AVDR2G
- Part No.:
- MC33063AVDR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33063AVDR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,755
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Product details
Overview
MC33063AVDR2G from onsemi is a monolithic DC-DC switching regulator controller IC designed for buck, boost, and voltage-inverting topologies. It integrates a temperature-compensated 1.25 V reference, comparator, oscillator with active current limiting, driver, and 1.5 A Darlington output switch. Operates from 3.0 V to 40 V input, supports up to 100 kHz switching frequency, and delivers precision 2% reference accuracy - used in industrial power supplies, battery-powered converters, and automotive auxiliary rails.
For engineers reviewing the MC33063AVDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its −40°C to +125°C operating ambient range, SOIC-8 package with Pb-free finish, adjustable output voltage capability, internal current limit sensing at 300 mV typical, and compatibility with external NPN/PNP switches for current boosting beyond 1.5 A.
Technical Context
The MC33063AVDR2G implements a fixed-frequency, current-mode control architecture using an internal oscillator whose timing is set by an external capacitor (CT) and resistor network. Its Darlington output stage enables robust 1.5 A peak switch current with low saturation voltage (≤1.3 V at 1.0 A), while the 1.25 V reference feeds a high-impedance comparator for precise feedback regulation.
It supports three fundamental converter configurations: step-down (buck), step-up (boost), and inverting - each requiring only five external components (inductor, diode, timing capacitor, current-sense resistor, and feedback divider). The device's −40°C to +125°C extended temperature rating and AEC-Q100 alignment (via NCV variant lineage) confirm suitability for under-hood automotive and harsh-environment industrial use.
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 without pre-regulation. |
| Output Switch Current | 1.5 A peak - enables direct drive of medium-power converters without external transistor in many applications. |
| Reference Voltage | 1.25 V ±2% - provides stable feedback threshold for accurate output voltage setting via resistive divider. |
| Switching Frequency | Up to 100 kHz - balances efficiency, EMI, and external component size; set by CT capacitor value. |
| Current Limit Threshold | 300 mV typical at Ipk sense pin - defines overcurrent protection point; sets Rsc = 0.3 Ω / Ipk(switch). |
| Operating Ambient Range | −40°C to +125°C - qualified for engine compartment, industrial controls, and extended-temperature embedded systems. |
| Package | SOIC-8 (Case 751-07) - surface-mount, RoHS-compliant, Pb-free, 2500-unit tape-and-reel packaging. |
Pinout & Package
MC33063AVDR2G is housed in an 8-pin SOIC-8 (Case 751-07) package with standard pin spacing (1.27 mm pitch), body dimensions 4.9 × 3.9 × 1.5 mm, and exposed thermal pad not present. Pin numbering follows standard SOIC convention (pin 1 marked by notch or dot, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Switch Collector | High-side collector node of internal Darlington switch; connects to inductor in buck/boost/inverting topologies. |
| 2 | Switch Emitter | Emitting terminal of internal switch; tied to ground in buck, to input in boost, or to output in inverting configuration. |
| 3 | Timing Capacitor | Connects external CT capacitor to set oscillator frequency and duty cycle timing. |
| 4 | GND | Power and signal reference ground; must be low-impedance return path for switch and oscillator currents. |
| 5 | Ipk Sense | Current-limit sense input; monitors voltage across external Rsc to terminate switch conduction when threshold reached. |
| 6 | Driver Collector | Collector of internal driver transistor; used to drive external NPN/PNP transistors for current boosting. |
| 7 | Comparator Inverting Input | Inverting input of error amplifier; connected to feedback divider to regulate output voltage against 1.25 V reference. |
| 8 | VCC | Positive supply input; powers internal circuitry; requires local bypass capacitor (typically 10 µF + 0.1 µF). |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Voltage Range | 3.0 V to 40 V operation eliminates need for pre-regulators in 12 V/24 V automotive and industrial systems. |
| Integrated 1.5 A Darlington Switch | Reduces BOM count and layout complexity for ≤1.5 A output converters without external transistor. |
| Precision 1.25 V Reference | ±2% tolerance ensures stable output regulation across temperature and line variations in feedback loops. |
| Adjustable Switching Frequency | Configurable up to 100 kHz via CT capacitor - allows optimization of efficiency, ripple, and magnetics size. |
| −40°C to +125°C Operating Range | Validated performance across full automotive-grade temperature envelope without derating. |
Applications
| Automotive Auxiliary Power Supply | Industrial DC-DC Converter |
|---|---|
Use Scenario: Generating stable 5 V or 3.3 V rail from 12 V vehicle battery for infotainment, sensors, or CAN transceivers. IC Role / Device Role / Timing Role: Primary controller in non-isolated buck topology; regulates output via feedback divider and manages switch timing. Use Value: Leverages −40°C to +125°C rating and 40 V max input to survive load-dump transients and cold-cranking conditions. |
Use Scenario: Converting 24 V factory bus to 15 V for PLC I/O modules or motor drivers. IC Role / Device Role / Timing Role: Core switching controller in step-down configuration; uses internal oscillator and current limit for cycle-by-cycle protection. Use Value: Enables compact, cost-effective design with only five external components and no external gate driver required. |
| Portable Battery-Powered Boost Supply | Voltage-Inverting Rail Generator |
Use Scenario: Stepping up single-cell Li-ion (3.0–4.2 V) to 5 V USB power for portable test equipment. IC Role / Device Role / Timing Role: Controller in boost topology; regulates output by modulating duty cycle based on feedback voltage. Use Value: Supports wide input range and delivers >87% efficiency at 175 mA (per Figure 9), minimizing battery drain. |
Use Scenario: Creating −12 V rail from 5 V microcontroller supply for op-amp biasing or RS-232 level shifting. IC Role / Device Role / Timing Role: Inverting regulator controller; alternately charges/discharges inductor to generate negative output. Use Value: Achieves ±0.012% line regulation (Figure 13) and operates reliably down to 4.5 V input - critical for low-voltage systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063ADR2G | 0°C to +70°C operating range; otherwise identical electrical specs and pinout. | Suitable for commercial-grade applications only; not rated for automotive or extended-temperature industrial use. | Select MC34063ADR2G only if ambient temperature stays within 0–70°C and cost is prioritized over qualification. |
| NCV33063AVDR2G | Identical −40°C to +125°C rating and SOIC-8 package; AEC-Q100 qualified and PPAP-capable. | Designed specifically for automotive safety-critical subsystems requiring change control and traceability. | Choose NCV33063AVDR2G when automotive compliance, lot traceability, or PPAP documentation is mandatory. |
Compared with MC33063AVDR2G, MC34063ADR2G lacks extended temperature support but offers lower cost for benign environments, while NCV33063AVDR2G adds AEC-Q100 validation and manufacturing controls - making it the preferred choice where automotive qualification is required.
Availability
MC33063AVDR2G is available at Aetrix Electronics and suitable for automotive auxiliary power supplies, industrial DC-DC converters, and portable battery-powered boost applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC33063AVDR2G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MC33063A series was engineered as a rugged, minimal-component DC-DC controller platform for cost-sensitive, reliability-critical power conversion in automotive and industrial environments - emphasizing wide input range, integrated switching, and extended temperature operation.
FAQ
What is the maximum input voltage supported by the MC33063AVDR2G?
The MC33063AVDR2G supports a maximum input voltage of 40 V DC, as specified in the Absolute Maximum Ratings table. This rating applies to both VCC and the switch collector pin, enabling direct connection to 24 V industrial buses or 12 V automotive systems with load-dump margin. Operation above 40 V risks permanent damage and is not supported.
Can the MC33063AVDR2G be used in a step-up (boost) configuration?
Yes, the MC33063AVDR2G is explicitly designed for step-up operation, as confirmed in the datasheet title and Figure 9. In boost mode, the internal switch connects the inductor to ground during the on-time, storing energy, then disconnects to allow inductor flyback through the output diode. External component values (inductor, diode, CT, Rsc, feedback resistors) must follow the design formulas in Figure 17.
What is the purpose of the Ipk Sense pin (Pin 5) on the MC33063AVDR2G?
The Ipk Sense pin (Pin 5) on the MC33063AVDR2G monitors voltage across an external current-sense resistor (Rsc) placed between the switch emitter and ground. When this voltage reaches ~300 mV (typical), the internal current limit circuit terminates the switch on-time - providing cycle-by-cycle overcurrent protection. Rsc value is calculated as 0.3 V / Ipk(switch) per the datasheet design equations.
Does the MC33063AVDR2G require an external transistor for higher output current?
The MC33063AVDR2G integrates a 1.5 A Darlington switch, sufficient for many applications. However, Figures 10, 12, and 14 show optional external NPN or PNP transistors driven from Pin 6 (Driver Collector) to extend peak current beyond 1.5 A. This is necessary only when load requirements exceed the internal switch capability - not a requirement for standard operation.
How does the MC33063AVDR2G differ from the MC34063A series?
The MC33063AVDR2G differs from the MC34063A primarily in its extended operating ambient temperature range (−40°C to +125°C vs. 0°C to +70°C) and tighter thermal specifications. Both share identical pinout, electrical characteristics, and functional block diagram. The "V" suffix denotes the extended temperature grade, while "A" indicates the second-generation revision with improved stability and reference accuracy.
MC33063AVDR2G 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:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33063AVDR2G FAQ
1.How can I place an order for MC33063AVDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063AVDR2G 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 MC33063AVDR2G reliable?
The price and inventory of MC33063AVDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063AVDR2G is usually 5 days.
3.What payment methods are accepted for MC33063AVDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33063AVDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33063AVDR2G?
MC33063AVDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063AVDR2G 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 MC33063AVDR2G?
For technical support, including MC33063AVDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063AVDR2G requirements.
6.How does Aetrix verify that MC33063AVDR2G is sourced from the original manufacturer or authorized distributors?
All MC33063AVDR2G 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 MC33063AVDR2G meets industry standards.
7.What is the process for return or replacement of MC33063AVDR2G?
All MC33063AVDR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC33063AVDR2G, 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 MC33063AVDR2G part is unused and in its original packaging.
Return procedure for MC33063AVDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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