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onsemi MC33063AVDR2
- Part No.:
- MC33063AVDR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33063AVDR2.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,636
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Product details
Overview
MC33063AVDR2 from onsemi is a 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 limiting, driver, and 1.5 A Darlington output switch. Designed for industrial power conversion, it operates from 3.0 V to 40 V input and delivers adjustable output voltage with up to 100 kHz switching frequency.
For engineers reviewing the MC33063AVDR2 datasheet, pinout, applications, or equivalent options, key selection criteria include its −40 °C to +125 °C operating ambient range, SOIC-8 package, 1.5 A internal switch current capability, precision 2% reference, and compatibility with external NPN/PNP boost configurations for >1.5 A peak current.
Technical Context
The MC33063AVDR2 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-connected output switch enables robust 1.5 A peak current handling with low saturation voltage (0.45 V typ at 1.0 A under forced-beta drive).
It features a precision 1.25 V ±2% bandgap reference referenced to the inverting input of the comparator, enabling accurate output voltage regulation via resistive feedback. The device supports three standard converter configurations-boost, buck, and inverting-with design formulas provided for inductor, timing capacitor, and current-sense resistor selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial and automotive battery-supplied systems |
| Output Switch Current | 1.5 A - enables direct drive of medium-power converters without external MOSFETs |
| Reference Voltage | 1.25 V ±2% - ensures stable output regulation across temperature and line variations |
| Switching Frequency | Up to 100 kHz - balances efficiency, EMI, and external component size for cost-sensitive designs |
| Operating Ambient Range | −40 °C to +125 °C - qualified for extended-temperature industrial and automotive applications |
| Package | SOIC-8 (D suffix) - surface-mount footprint compatible with standard PCB assembly processes |
| Thermal Resistance (RJA) | 160 °C/W - defines maximum power dissipation limit (625 mW at TA = 25 °C) for thermal design |
Pinout & Package
MC33063AVDR2 is housed in an 8-pin SOIC-8 (Case 751) package with exposed pad not present. Pin functions are validated per Figure 2 and Table 1 of the official ON Semiconductor datasheet (Rev. 24, Dec 2016).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Switch Collector | High-side collector node of internal Darlington transistor; connects to inductor in boost/buck-inverting topologies |
| 2 | Switch Emitter | Emitting terminal of internal Darlington; forms current-sense path with RSC to ground |
| 3 | Timing Capacitor | Connects external CT capacitor to set oscillator frequency and duty cycle |
| 4 | GND | Analog and power ground reference for all internal circuits and current-sense amplifier |
| 5 | Ipk Sense | Inverting input of current-limit comparator; monitors voltage drop across RSC for overcurrent protection |
| 6 | Driver Collector | Collector of internal driver transistor; used for external NPN boost configurations (Fig. 10) |
| 7 | Comparator Inverting Input | Feedback node for output voltage regulation; connected to resistor divider from VOUT |
| 8 | VCC | Main supply input; powers internal circuitry and provides bias for oscillator and reference |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5 A Darlington switch | Eliminates need for external high-current transistors in ≤1.5 A applications, reducing BOM count and layout area |
| Precision 1.25 V ±2% reference | Enables tight output voltage tolerance (±2%) across full temperature and line range without trimming |
| Adjustable switching frequency (≤100 kHz) | Allows optimization of inductor size, efficiency, and EMI performance via single external capacitor (CT) |
| Current-limit protection with 300 mV typical sense threshold | Provides predictable, temperature-stable overcurrent shutdown at IPK ≈ 0.3 / RSC |
| −40 °C to +125 °C operating ambient range | Supports deployment in harsh environments including industrial controls, automotive body electronics, and outdoor equipment |
Applications
| Industrial Power Supplies | Automotive Body Control Modules |
|---|---|
Use Scenario: Generating isolated 5 V or 12 V rails from 24 V truck battery systems with wide input transients. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing step-down conversion with built-in current limiting and thermal stability. Use Value: Delivers regulated output with 83.7% efficiency at 500 mA load and maintains operation down to −40 °C ambient. | Use Scenario: Providing stable 5 V supply for microcontrollers and sensors in door modules subject to cold cranking and load dump. IC Role / Device Role / Timing Role: Regulator IC configured as buck converter with fast transient response and overvoltage/overcurrent protection. Use Value: Operates reliably across −40 °C to +125 °C and withstands 40 V input transients per automotive requirements. |
| Portable Medical Instrumentation | LED Driver for Industrial Lighting |
Use Scenario: Generating negative bias voltage (−12 V) for op-amp rails in handheld diagnostic devices powered by 4.5–6.0 V Li-ion batteries. IC Role / Device Role / Timing Role: Inverting DC-DC converter delivering regulated negative output with low ripple and high line/load regulation. Use Value: Achieves ±0.012% line regulation and 62.2% efficiency at 100 mA, suitable for battery-constrained portable use. | Use Scenario: Driving constant-current LED strings from 12–24 V industrial bus supplies with dimming support. IC Role / Device Role / Timing Role: Step-up controller regulating LED current via external sense resistor and PWM-compatible enable pin. Use Value: Supports 28 V/175 mA output with 87.7% efficiency and <40 mVpp ripple when filtered, meeting EMI and thermal constraints. |
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 |
|---|---|---|---|
| MC34063ADR2G | Same architecture but rated for 0 °C to +70 °C ambient; lacks extended temperature qualification | Suitable only for commercial-grade applications; not qualified for automotive or extended-temperature industrial use | Select MC34063ADR2G only if ambient temperature remains within 0–70 °C and AEC-Q100 compliance is unnecessary |
| NCV33063AVDR2G | Identical electrical specs and pinout; adds AEC-Q100 qualification and PPAP capability | Required for automotive safety-critical subsystems where change control and traceability are mandated | Choose NCV33063AVDR2G when automotive qualification, site-specific control, or PPAP documentation is required |
Compared with MC33063AVDR2, MC34063ADR2G offers lower-cost commercial operation but sacrifices extended temperature and automotive reliability assurance, while NCV33063AVDR2G provides identical performance with certified automotive compliance-making it the preferred upgrade path for safety-conscious designs.
Availability
MC33063AVDR2 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, portable medical instrumentation, and LED lighting systems requiring stable component supply across extended temperature ranges.
Supply support for MC33063AVDR2 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 developed to provide highly integrated, cost-effective DC-DC switching regulators for space- and BOM-constrained applications where reliability across extreme temperatures is essential.
FAQ
What is the maximum input voltage rating for the MC33063AVDR2?
The MC33063AVDR2 has a maximum input voltage rating of 40 Vdc on the VCC pin. This rating applies across its full operating ambient temperature range of −40 °C to +125 °C. Exceeding this voltage may damage the internal Darlington switch and oscillator circuitry. Designers should ensure transient suppression (e.g., TVS diodes) is implemented in systems where input surges exceed 40 V, such as automotive load-dump scenarios. The MC33063AVDR2 datasheet specifies this absolute maximum in the "Maximum Ratings" table on page 2.
Does the MC33063AVDR2 support external NPN transistor boosting?
Yes, the MC33063AVDR2 supports external NPN transistor boosting via Pin 6 (Driver Collector), as shown in Figures 10 and 12 of the datasheet. When the internal 1.5 A switch is insufficient, an external NPN can be driven in common-emitter configuration to handle peak currents beyond 1.5 A. This requires connecting the external transistor's base through a current-limiting resistor to Pin 6, emitter to ground, and collector to the inductor. The MC33063AVDR2 retains full current-limit and oscillator control in this configuration.
What is the typical current-limit sense voltage threshold for the MC33063AVDR2?
The typical current-limit sense voltage threshold for the MC33063AVDR2 is 300 mV, measured between Pins 2 (Switch Emitter) and 5 (Ipk Sense). This value is specified in the "Electrical Characteristics" table on page 3 under "Current Limit Sense Voltage (Ichg = Idischg, TA = 25 °C)" with a min/typ/max range of 250/300/350 mV. Designers calculate the current-sense resistor RSC as RSC = 0.3 / IPK(MAX) to set the desired peak switch current limit.
Can the MC33063AVDR2 be used in a step-down (buck) configuration?
Yes, the MC33063AVDR2 is explicitly designed for step-down (buck) operation, as demonstrated in Figure 11 of the datasheet. In buck mode, Pin 1 (Switch Collector) connects to the input voltage, Pin 2 (Switch Emitter) connects to ground through RSC, and the inductor is placed between Pin 1 and the output node. The device regulates output voltage via feedback to Pin 7 using a resistor divider. Efficiency reaches 83.7% at 500 mA output, confirming its suitability for medium-power buck applications.
Is the MC33063AVDR2 RoHS compliant and lead-free?
Yes, the MC33063AVDR2 is RoHS compliant and lead-free, as confirmed in the "Features" section on page 1 and the "Ordering Information" table on page 12 of the datasheet. The "G" suffix in the part number (MC33063AVDR2G) explicitly denotes Pb-free packaging. It also meets halogen-free and BFR-free requirements, making it suitable for environmentally regulated industrial and automotive manufacturing.
MC33063AVDR2 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:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33063AVDR2 FAQ
1.How can I place an order for MC33063AVDR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063AVDR2 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 MC33063AVDR2 reliable?
The price and inventory of MC33063AVDR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063AVDR2 is usually 5 days.
3.What payment methods are accepted for MC33063AVDR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33063AVDR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33063AVDR2?
MC33063AVDR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063AVDR2 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 MC33063AVDR2?
For technical support, including MC33063AVDR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063AVDR2 requirements.
6.How does Aetrix verify that MC33063AVDR2 is sourced from the original manufacturer or authorized distributors?
All MC33063AVDR2 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 MC33063AVDR2 meets industry standards.
7.What is the process for return or replacement of MC33063AVDR2?
All MC33063AVDR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33063AVDR2, 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 MC33063AVDR2 part is unused and in its original packaging.
Return procedure for MC33063AVDR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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