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onsemi SC33063ADR2G
- Part No.:
- SC33063ADR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SC33063ADR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
SC33063ADR2G from onsemi is a monolithic DC-DC converter controller IC designed for step-down (buck), step-up (boost), and voltage-inverting applications. It integrates a 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 and supports up to 100 kHz switching frequency-used in compact power supplies for industrial sensors and portable instrumentation.
For engineers reviewing the SC33063ADR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its adjustable output voltage capability, internal 2% precision reference, SOIC-8 Pb-free package, and −40°C to +85°C operating ambient range for ruggedized embedded designs.
Technical Context
The SC33063ADR2G implements a fixed-frequency, current-mode control architecture using an internal oscillator whose timing is set by an external capacitor (CT). Its Darlington-connected output switch delivers up to 1.5 A peak current with typical saturation voltage of 1.0 V at 1.0 A, enabling efficient low-component-count converters without external MOSFETs.
It features a precision 1.25 V ±2% bandgap reference referenced to the inverting comparator input (Pin 5), allowing stable feedback regulation across input and load variations. The current-limit sense threshold is fixed at 300 mV (typ), directly setting peak switch current via an external sense resistor (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-supplied systems |
| Output Switch Current | 1.5 A peak - enables direct drive of inductive loads without external transistor in many mid-power applications |
| Oscillator Frequency | Up to 100 kHz - sets practical upper limit for inductor size and EMI filtering requirements |
| Reference Voltage | 1.25 V ±2% - provides stable feedback node for accurate output voltage regulation |
| Current Limit Threshold | 300 mV (typ) - defines Rsc = 0.3 / Ipk for precise overcurrent protection |
| Operating Ambient Range | −40°C to +85°C - qualified for extended-temperature industrial environments |
| Package | SOIC-8 (Case 751-07) - surface-mount, RoHS-compliant, 5.0 × 4.0 mm footprint |
Pinout & Package
SC33063ADR2G is housed in an 8-pin SOIC-8 (Case 751-07) package with standard gull-wing leads, 1.27 mm pitch, and Pb-free finish per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Switch Collector) | Output switch collector terminal | Connects to inductor/diode node in boost/inverting topologies; carries full switched current |
| 2 (Switch Emitter) | Output switch emitter terminal | Return path for switch current; tied to ground in buck configuration |
| 3 (Timing Capacitor) | Oscillator timing node | External capacitor (CT) sets oscillator frequency and duty cycle timing |
| 4 (GND) | Power and signal ground reference | Common return for internal circuits, reference, and external components |
| 5 (Comparator Inverting Input) | Feedback voltage sensing input | Connected to resistor divider from output; compares against 1.25 V reference |
| 6 (Ipk Sense) | Current limit sense input | Monitors voltage across Rsc; triggers shutdown when ≥300 mV |
| 7 (Driver Collector) | Internal driver output collector | Can drive external NPN/PNP transistors for higher current boost configurations |
| 8 (VCC) | Power supply input | Supplies internal circuitry; must be bypassed with ≥100 nF ceramic capacitor |
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 area |
| Precision 1.25 V ±2% reference | Enables stable output regulation across temperature and line/load changes without trimming |
| Adjustable oscillator frequency (≤100 kHz) | Allows optimization of efficiency vs. size trade-off via CT selection |
| Low standby current | Reduces quiescent power draw in battery-powered systems during light/no-load conditions |
| Current limiting with 300 mV threshold | Provides predictable, resistor-set overcurrent protection independent of supply voltage |
Applications
| Industrial Sensor Power Supply | Portable Instrumentation DC-DC |
|---|---|
Use Scenario: Powering 5 V/200 mA analog sensor modules from 12 V rail in factory automation PLC I/O cards. IC Role / Device Role / Timing Role: Step-down (buck) regulator controlling inductor current and feedback loop timing via CT and Rsc. Use Value: Achieves 83.7% efficiency at 500 mA output with minimal external parts-reducing thermal stress and board space. | Use Scenario: Generating −12 V/100 mA bias for op-amp rails in handheld test equipment powered by single 5 V USB source. IC Role / Device Role / Timing Role: Voltage-inverting regulator using Pin 1–2 as switch node and Pin 5 feedback reference. Use Value: Delivers regulated negative output with <±0.012% line regulation-critical for precision analog front-ends. |
| Automotive Body Control Module | Legacy Equipment Voltage Translation |
Use Scenario: Converting 24 V vehicle battery to 5 V for microcontroller and CAN transceiver in door module. IC Role / Device Role / Timing Role: Buck converter with external diode and inductor; uses internal 1.5 A switch and 1.25 V reference for closed-loop control. Use Value: Operates reliably across −40°C to +85°C ambient-meeting extended-temperature requirements without derating. | Use Scenario: Upgrading obsolete 7805-based supplies in legacy industrial controllers to support higher input voltage ranges (up to 40 V). IC Role / Device Role / Timing Role: Boost converter generating 12 V from 5 V logic rail to drive relays and optocouplers. Use Value: Enables retrofit with no PCB redesign-same SOIC-8 footprint and compatible pinout as earlier MC34063A variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33063ADR2G | Same die, identical electrical specs; differs only in manufacturer prefix and marking | No functional difference; both rated −40°C to +85°C, SOIC-8, Pb-free | Select SC33063ADR2G for sourcing flexibility within same onsemi product family |
| NCV33063AVDR2G | Automotive-grade variant with −40°C to +125°C junction rating and AEC-Q100 qualification | Required for under-hood automotive applications; higher thermal margin and PPAP support | Choose NCV33063AVDR2G only when automotive qualification or >85°C ambient is mandatory |
Compared with SC33063ADR2G, MC33063ADR2G offers identical performance and compatibility, while NCV33063AVDR2G adds automotive qualification and extended temperature operation-making it suitable only where those specific requirements apply.
Availability
SC33063ADR2G is available at Aetrix Electronics and suitable for industrial sensor power supplies, portable instrumentation DC-DC conversion, and legacy equipment voltage translation requiring stable component supply and long-term manufacturability.
Supply support for SC33063ADR2G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.
The SC33063ADR2G belongs to the MC33063A series of monolithic DC-DC controller ICs, engineered for minimal-component, cost-sensitive buck/boost/inverting power conversion in industrial and commercial applications.
FAQ
What is the maximum input voltage supported by the SC33063ADR2G?
The SC33063ADR2G supports a maximum input voltage of 40 V DC, as specified in its Absolute Maximum Ratings table. This allows direct operation from 24 V industrial rails or 36 V nominal battery systems without pre-regulation. Exceeding 40 V may damage the device, and design margins should account for transients per application requirements.
Does the SC33063ADR2G require an external MOSFET for 1.5 A output current?
No, the SC33063ADR2G integrates a Darlington-connected bipolar output switch rated for 1.5 A peak current, eliminating the need for an external MOSFET in most ≤1.5 A applications. External transistors are only required when peak current exceeds 1.5 A, using Pin 7 (Driver Collector) per Figures 10–14 in the datasheet.
What is the function of Pin 5 on the SC33063ADR2G?
Pin 5 is the comparator's inverting input, which connects to the feedback resistor divider from the output. It compares the divided output voltage against the internal 1.25 V reference to regulate output voltage. Its voltage must remain within −0.3 V to +40 V, and it draws negligible bias current (−20 nA typ), enabling high-impedance feedback networks.
Can the SC33063ADR2G be used in a voltage-inverting configuration?
Yes, the SC33063ADR2G is explicitly designed for voltage-inverting (buck-boost) operation, as shown in Figure 13 of the datasheet. In this mode, Pin 1 (Switch Collector) connects to the inductor, Pin 2 (Switch Emitter) to ground, and the output is taken from the inductor–diode junction with polarity inversion relative to input.
What package type and lead finish does the SC33063ADR2G use?
The SC33063ADR2G uses an SOIC-8 package (Case 751-07), measuring 5.0 mm × 4.0 mm with 1.27 mm lead pitch. It features a Pb-free (RoHS-compliant) finish, indicated by the "G" suffix in the part number, and is supplied in tape-and-reel format (2500 units per reel).
SC33063ADR2G 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:
- 33kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SC33063ADR2G FAQ
1.How can I place an order for SC33063ADR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for SC33063ADR2G 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 SC33063ADR2G reliable?
The price and inventory of SC33063ADR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC33063ADR2G is usually 5 days.
3.What payment methods are accepted for SC33063ADR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC33063ADR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC33063ADR2G?
SC33063ADR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC33063ADR2G 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 SC33063ADR2G?
For technical support, including SC33063ADR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC33063ADR2G requirements.
6.How does Aetrix verify that SC33063ADR2G is sourced from the original manufacturer or authorized distributors?
All SC33063ADR2G 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 SC33063ADR2G meets industry standards.
7.What is the process for return or replacement of SC33063ADR2G?
All SC33063ADR2G units undergo pre-shipment inspection (PSI). If there is an issue with SC33063ADR2G, 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 SC33063ADR2G part is unused and in its original packaging.
Return procedure for SC33063ADR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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