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onsemi MC33063AVPG
- Part No.:
- MC33063AVPG
- Manufacturer:
- onsemi
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MC33063AVPG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:439
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Product details
Overview
MC33063AVPG from onsemi is a monolithic DC-DC switching regulator controller IC designed for step-down (buck), step-up (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 requiring compact, low-component-count DC-DC conversion.
For engineers reviewing the MC33063AVPG datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, real-world application configurations (buck/boost/inverting), confirmed thermal and electrical specifications, and two rigorously cross-referenced alternative parts with documented functional and packaging differences.
Technical Context
The MC33063AVPG implements a fixed-frequency, current-mode control architecture with internal oscillator timing governed by an external capacitor (CT) and discharge-to-charge current ratio of 5.2–7.5. Its Darlington output stage enables 1.5 A switch current with typical VCE(sat) of 1.0 V at 1.0 A, while the precision 1.25 V reference (±2%) sets output voltage via external resistor divider.
It features integrated current limiting via IPk sense voltage (250–350 mV), low standby current (<4.0 mA), and operates across −40°C to +125°C ambient - qualifying it for extended-temperature industrial and automotive auxiliary power applications where discrete transistor-based regulators demand minimal external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial rails including 12 V, 24 V, and 36 V battery or adapter-fed systems. |
| Output Switch Current | 1.5 A - enables direct drive of power inductors without external boost transistors in ≤10 W DC-DC designs. |
| Reference Voltage | 1.25 V ±2% - sets regulated output voltage accuracy in buck/boost/inverting configurations using R1/R2 feedback network. |
| Switching Frequency | Up to 100 kHz - balances efficiency vs. size; CT capacitor value directly determines operating frequency per oscillator timing equation. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive auxiliary supplies and harsh-environment industrial controllers. |
| Package Type | PDIP-8 (Case 626) - through-hole mounting compatible with legacy PCB assembly and prototyping; 0.300" width, 0.100" lead pitch. |
| Thermal Resistance | RJA = 115°C/W - defines maximum power dissipation (1.25 W at TA = 25°C) before junction exceeds 150°C limit. |
Pinout & Package
MC33063AVPG is housed in an 8-pin plastic dual in-line package (PDIP-8, Case 626), with 0.300" body width and 0.100" lead pitch. Pin 1 is located at the left end of the top row when viewed from top with notch or dot orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Switch Collector | High-side collector node of internal Darlington transistor; connects to inductor in buck/boost/inverting topologies. |
| 2 | Switch Emitter | Emitting terminal of internal Darlington; tied to ground in buck, to input in boost, or forms inverting node in inverter. |
| 3 | Timing Capacitor | Connects external CT capacitor to set oscillator frequency; discharge/charge currents define on/off time ratio. |
| 4 | GND | Power and signal reference ground; must be low-impedance return path for switch, reference, and comparator circuits. |
| 5 | IPk Sense | Current limit threshold input; voltage across RSC sensed here to terminate switch conduction at 250–350 mV. |
| 6 | Driver Collector | Open-collector output driving external NPN/PNP boost transistors when >1.5 A peak current required. |
| 7 | Comparator Inverting Input | Feedback node for output regulation; connected to resistor divider from VOUT to set 1.25 V reference point. |
| 8 | VCC | Main supply input; powers internal circuitry; must be ≥3.0 V and ≤40 V; bypassed with 0.1 µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Darlington Output Switch | 1.5 A continuous current capability eliminates need for external power transistor in most <10 W converters. |
| Precision Reference Voltage | 1.25 V ±2% ensures stable output regulation across temperature and line variations without trimming. |
| Adjustable Switching Frequency | Set externally via CT capacitor (24–42 kHz typical at 1 nF); enables optimization of efficiency, size, and EMI. |
| Internal Current Limit Protection | 250–350 mV IPk sense threshold provides cycle-by-cycle overcurrent shutdown without external sensing IC. |
| Wide Operating Temperature Range | −40°C to +125°C ambient rating supports deployment in engine compartments, factory automation, and outdoor equipment. |
Applications
| Industrial Power Supply | Automotive Auxiliary Converter |
|---|---|
Use Scenario: Generating isolated 5 V/500 mA from 24 V vehicle battery for infotainment MCU and sensors. IC Role / Device Role / Timing Role: Step-down (buck) controller regulating output via feedback divider; oscillator sets 50 kHz switching frequency. Use Value: Enables single-chip solution with <83.7% efficiency at full load and ±0.12% line regulation - reducing BOM count versus discrete alternatives. |
Use Scenario: Converting 12 V battery to −12 V/100 mA for analog sensor biasing in ADAS camera modules. IC Role / Device Role / Timing Role: Voltage-inverting converter; internal oscillator and Darlington switch implement polarity reversal topology. Use Value: Delivers ±0.012% line regulation and 62.2% efficiency without external level-shifting or op-amps - simplifying high-reliability automotive design. |
| Portable Equipment DC-DC | Legacy Industrial Control Rail |
Use Scenario: Boosting 3.7 V Li-ion battery to 12 V for small solenoid drivers in handheld test instruments. IC Role / Device Role / Timing Role: Step-up (boost) controller; IPk sense pin monitors inductor current to prevent saturation during transient loads. Use Value: Achieves 87.7% efficiency and ±0.05% line regulation with only 6 external components - extending battery life and easing layout. |
Use Scenario: Replacing aging discrete regulator in PLC I/O module requiring 5 V @ 300 mA from 24 V backplane. IC Role / Device Role / Timing Role: Buck controller operating at 33 kHz; PDIP-8 package allows drop-in replacement on existing through-hole PCBs. Use Value: Maintains compatibility with legacy board layouts while improving thermal margin (RJA = 115°C/W) and eliminating discrete transistor matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063AP1G | Same architecture but rated for 0°C to +70°C operation; no extended-temperature qualification. | Limited to commercial-grade environments; unsuitable for under-hood or outdoor industrial use. | Select MC34063AP1G only if ambient temperature stays within 0–70°C and cost sensitivity outweighs thermal margin. |
| NCV33063AVDR2G | Identical electrical specs and −40°C to +125°C range, but supplied in SOIC-8 tape-and-reel (2500 pcs) instead of PDIP-8 rail (50 pcs). | Requires SMT reflow process and PCB redesign; not pin-compatible due to different footprint and lead form. | Choose NCV33063AVDR2G for high-volume automated assembly where surface-mount is mandated and layout revision is feasible. |
Compared with MC33063AVPG, MC34063AP1G sacrifices extended temperature capability for lower cost in benign environments, while NCV33063AVDR2G preserves full spec compliance but mandates SMT infrastructure and layout change - making MC33063AVPG the sole through-hole, extended-temp, rail-packaged option in the family.
Availability
MC33063AVPG is available at Aetrix Electronics and suitable for industrial power supplies, automotive auxiliary converters, portable equipment DC-DC stages, and legacy control rail replacements requiring stable component supply and long-term obsolescence management.
Supply support for MC33063AVPG 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 sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MC33063A series was engineered as a cost-optimized, monolithic DC-DC controller platform targeting applications needing reliable, low-component-count buck/boost/inverting conversion - especially where extended temperature range and Pb-free compliance are mandatory.
FAQ
What is the maximum switching frequency supported by the MC33063AVPG?
The MC33063AVPG supports oscillator frequencies up to 100 kHz, determined by the external timing capacitor (CT) value and internal charge/discharge currents. At 1.0 nF, typical frequency is 33 kHz (24–42 kHz range). Higher frequencies reduce inductor size but increase switching losses - design trade-offs must be validated per application load and thermal constraints using MC33063AVPG's published timing equations.
Can the MC33063AVPG be used in a step-up (boost) configuration?
Yes, the MC33063AVPG is explicitly designed for step-up operation, as shown in Figure 9 of its datasheet. In boost mode, Pin 2 (Switch Emitter) connects to input voltage, Pin 1 (Switch Collector) drives the inductor, and the output rectifier feeds regulated voltage to the load. The MC33063AVPG's 1.5 A Darlington switch and 40 V collector rating support typical boost designs up to ~10 W with proper inductor and diode selection.
What is the purpose of the IPk Sense pin (Pin 5) on the MC33063AVPG?
Pin 5 (IPk Sense) monitors voltage across the external current-sense resistor (RSC) to enforce cycle-by-cycle current limiting. When voltage reaches 250–350 mV, the MC33063AVPG terminates the switch-on time, protecting the internal Darlington transistor and external magnetics. This function enables robust short-circuit and overload protection without additional ICs - a core safety feature confirmed in MC33063AVPG's Electrical Characteristics table.
Does the MC33063AVPG require an external transistor for higher output current?
The MC33063AVPG's internal Darlington switch supports up to 1.5 A peak current. For loads exceeding this, Figures 10–14 in the datasheet show how to connect external NPN or PNP transistors using Pin 6 (Driver Collector) and Pin 2 (Switch Emitter). This external boost configuration is necessary to maintain reliability beyond 1.5 A - the MC33063AVPG itself does not auto-scale; external components must be selected per thermal and gain requirements.
Is the MC33063AVPG RoHS compliant and Pb-free?
Yes, the MC33063AVPG is RoHS compliant and Pb-free, as indicated by the "G" suffix in its ordering code and confirmed in the "ORDERING INFORMATION" section (page 12) and "Features" list (page 1) of the official onsemi datasheet. It meets halogen-free and BFR-free requirements, making it suitable for environmentally regulated industrial and automotive production programs.
MC33063AVPG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MC33063AVPG FAQ
1.How can I place an order for MC33063AVPG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063AVPG 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 MC33063AVPG reliable?
The price and inventory of MC33063AVPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063AVPG is usually 5 days.
3.What payment methods are accepted for MC33063AVPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33063AVPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33063AVPG?
MC33063AVPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063AVPG 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 MC33063AVPG?
For technical support, including MC33063AVPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063AVPG requirements.
6.How does Aetrix verify that MC33063AVPG is sourced from the original manufacturer or authorized distributors?
All MC33063AVPG 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 MC33063AVPG meets industry standards.
7.What is the process for return or replacement of MC33063AVPG?
All MC33063AVPG units undergo pre-shipment inspection (PSI). If there is an issue with MC33063AVPG, 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 MC33063AVPG part is unused and in its original packaging.
Return procedure for MC33063AVPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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