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onsemi MC33063ADR2G
- Part No.:
- MC33063ADR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33063ADR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,666
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Product details
Overview
MC33063ADR2G from onsemi is a monolithic DC-DC switching regulator controller IC designed for buck, boost, and voltage-inverting topologies. It integrates an internal temperature-compensated 1.25 V reference, comparator, oscillator with active current limiting, driver, and 1.5 A high-current output switch. It operates from 3.0 V to 40 V input, supports up to 100 kHz switching frequency, and delivers adjustable output voltage in industrial power conversion applications.
For engineers reviewing the MC33063ADR2G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, SOIC-8 package mapping, confirmed pin functions, real-world converter performance data (e.g., 87.7% efficiency in step-up), and two validated alternative parts with documented functional differences.
Technical Context
The MC33063ADR2G 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-connected output switch enables 1.5 A peak current capability with typical VCE(sat) of 1.0 V at 1.0 A, while the precision 1.25 V ±2% reference ensures stable feedback regulation across temperature.
It supports three primary configurations: step-down (buck), step-up (boost), and voltage-inverting-each requiring distinct external component arrangements (inductor placement, diode polarity, feedback resistor network). The IPk sense voltage is fixed at 300 mV (typ), enabling accurate current limiting without external sensing resistors beyond Rsc.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Output Switch Current | 1.5 A peak - enables direct drive of medium-power converters without external transistor boost. |
| Reference Voltage | 1.25 V ±2% - provides tight output voltage regulation accuracy for feedback loop stability. |
| Switching Frequency | Up to 100 kHz - balances efficiency, inductor size, and EMI in cost-sensitive designs. |
| Current Limit Threshold | 300 mV (typ) at IPk sense pin - sets overcurrent protection point with predictable trip level. |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial ambient conditions. |
| Package | SOIC-8 (Case 751-07) - surface-mount compatible with standard reflow profiles and PCB assembly. |
Pinout & Package
MC33063ADR2G is housed in an 8-pin SOIC-8 package (Case 751-07), measuring 4.9 mm × 3.9 mm × 1.5 mm, with gull-wing leads and Pb-free finish. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left when viewed from top).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Switch Collector | High-side collector node of internal Darlington switch; connects to inductor/diode in boost/inverting, or to input in buck. |
| 2 | Switch Emitter | Emitting node of internal switch; tied to GND in buck, to inductor in boost/inverting - forms current return path. |
| 3 | Timing Capacitor | Connects external CT capacitor; sets oscillator frequency via charge/discharge cycle timing. |
| 4 | GND | Power and signal ground reference for all internal circuits and external feedback network. |
| 5 | IPk Sense | Senses voltage across external Rsc; triggers current limit when ≥300 mV (typ), protecting switch and load. |
| 6 | Driver Collector | Open-collector output driving external NPN/PNP transistors in boosted-current configurations. |
| 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; must be ≥3.0 V and ≤40 V; bypassed with 0.1 µF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5 A Darlington switch | Eliminates need for external power transistor in ≤1.5 A applications, reducing BOM count and layout complexity. |
| Adjustable output voltage | Enabled by resistive feedback divider to pin 7; supports any output ≥1.25 V with standard resistor ratios. |
| Low standby current | Typical ICC ≤ 4.0 mA - minimizes quiescent loss in battery-powered or always-on systems. |
| Internal 2% precision reference | 1.25 V reference stable over −40°C to +85°C - ensures consistent regulation without external trimming. |
| Current-limit protection | Fixed 300 mV IPk threshold - provides repeatable, temperature-stable overcurrent shutdown without calibration. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Generating 5 V or 12 V from a 24 V truck battery for microcontroller and sensor rails. IC Role / Device Role / Timing Role: Step-down (buck) regulator controller managing switching duty cycle and current limiting. Use Value: Delivers 500 mA at 83.7% efficiency (Vin = 25 V), with line/load regulation <±0.12%, meeting automotive transient requirements. |
Use Scenario: Converting 12 V vehicle battery to −12 V for analog op-amp biasing or RS-232 interface. IC Role / Device Role / Timing Role: Voltage-inverting regulator controller establishing negative rail with single inductor. Use Value: Achieves −12 V/100 mA with 62.2% efficiency and <±0.012% line regulation, supporting noise-sensitive analog subsystems. |
| Portable Medical Instrument | IoT Sensor Node Power |
|
Use Scenario: Boosting 3.3 V from Li-ion battery to 5 V for USB peripheral charging or display backlight. IC Role / Device Role / Timing Role: Step-up (boost) controller regulating output under variable input and load. Use Value: Provides 28 V/175 mA with 87.7% efficiency and 40 mVpp ripple (with filter), extending battery runtime. |
Use Scenario: Regulating 3.0–40 V wide-input solar or energy-harvesting source to stable 3.3 V for MCU and radio. IC Role / Device Role / Timing Role: Wide-input buck/boost controller adapting to fluctuating source voltages. Use Value: Maintains regulation across full 3.0–40 V range with low 4.0 mA supply current, optimizing energy harvesting yield. |
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 | Same architecture and pinout; wider operating temperature (0°C to +70°C vs. −40°C to +85°C); no automotive qualification. | Preferred for commercial-grade consumer electronics where extended temperature is not required. | Select MC34063ADR2G only if ambient operating range stays above 0°C and AEC-Q100 compliance is unnecessary. |
| NCV33063AVDR2G | Identical electrical specs; qualified to AEC-Q100 Grade 1 (−40°C to +125°C); enhanced process controls for automotive use. | Required for under-hood automotive modules subject to PPAP and long-term reliability validation. | Choose NCV33063AVDR2G when automotive qualification, extended junction temperature, or change-controlled manufacturing is mandated. |
Compared with MC33063ADR2G, MC34063ADR2G offers lower-cost commercial operation but lacks industrial temperature support, while NCV33063AVDR2G adds automotive qualification and higher thermal margin at a premium - selection depends strictly on environmental and compliance requirements.
Availability
MC33063ADR2G is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, portable medical instruments, and IoT sensor nodes requiring stable component supply and long-lifecycle support.
Supply support for MC33063ADR2G 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, cloud, and IoT markets.
The MC33063A series was designed specifically for cost-sensitive, medium-power DC-DC conversion in industrial and automotive environments where minimal external components and robust thermal performance are critical.
FAQ
What is the maximum switching frequency supported by the MC33063ADR2G?
The MC33063ADR2G supports oscillator frequencies up to 100 kHz, determined by the external timing capacitor (CT) value and internal charge/discharge currents. At TA = 25°C with CT = 1.0 nF, typical frequency is 33 kHz; higher values reduce frequency, lower values increase it - design must stay within 24–42 kHz (min–max) per datasheet limits.
Can the MC33063ADR2G be used in a step-down (buck) configuration?
Yes, the MC33063ADR2G is explicitly designed for buck, boost, and inverting topologies. In buck mode, pin 1 (switch collector) connects to VIN, pin 2 (switch emitter) to GND, and the inductor sits between pin 1 and VOUT. Figure 11 in the datasheet shows a validated 25 V → 5 V/500 mA design achieving 83.7% efficiency.
What is the purpose of the IPk Sense pin (pin 5) on the MC33063ADR2G?
The IPk Sense pin (pin 5) monitors voltage across an external sense resistor (Rsc) placed in series with the switch emitter. When this voltage reaches ~300 mV (typ), the internal current limit circuit activates, reducing duty cycle to protect the IC and external components - enabling precise, repeatable overcurrent protection without calibration.
Does the MC33063ADR2G require an external transistor for higher output current?
Yes - while the MC33063ADR2G's internal Darlington switch supports up to 1.5 A peak, external NPN or PNP transistors can be added via pin 6 (driver collector) to extend peak current beyond 1.5 A. Figures 10, 12, and 14 detail external boost connections, including saturation drive recommendations to avoid slow turn-off at high frequencies.
Is the MC33063ADR2G RoHS compliant and Pb-free?
Yes, the MC33063ADR2G is Pb-free, halogen-free/BFR-free, and fully RoHS compliant, as confirmed in the "Features" section of the datasheet and ordering information table. The "G" suffix in the part number explicitly denotes Pb-free packaging per onsemi's standard marking convention.
MC33063ADR2G 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33063ADR2G FAQ
1.How can I place an order for MC33063ADR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063ADR2G 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 MC33063ADR2G reliable?
The price and inventory of MC33063ADR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063ADR2G is usually 5 days.
3.What payment methods are accepted for MC33063ADR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33063ADR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33063ADR2G?
MC33063ADR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063ADR2G 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 MC33063ADR2G?
For technical support, including MC33063ADR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063ADR2G requirements.
6.How does Aetrix verify that MC33063ADR2G is sourced from the original manufacturer or authorized distributors?
All MC33063ADR2G 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 MC33063ADR2G meets industry standards.
7.What is the process for return or replacement of MC33063ADR2G?
All MC33063ADR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC33063ADR2G, 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 MC33063ADR2G part is unused and in its original packaging.
Return procedure for MC33063ADR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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