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MC33063ADR2G DC-DC Switching Regulator Controller IC Chip 3V-40V Input 1.5A 100kHz SOIC-8
MC33063ADR2G Product Overview
When selecting a DC-DC controller for industrial-grade power conversion circuits, designers typically focus on three things: whether the temperature range covers harsh operating environments, whether topology flexibility supports boost/buck/inverting modes, and whether external component count is minimal. The onsemi MC33063ADR2G is a classic monolithic DC-DC converter control circuit built for exactly that requirement. As the industrial-grade version of the MC34063A series, its operating temperature range extends to -40℃ to +85℃, suitable for industrial automation, automotive electronics, and outdoor equipment applications with higher environmental adaptability requirements.
The device is a monolithic control circuit containing the primary functions required for DC-to-DC converters: an internal temperature-compensated reference (2% precision), comparator, controlled duty cycle oscillator with active current limit circuit, driver, and high-current output switch. Input voltage ranges from 3.0V to 40V, adjustable output voltage from 1.25V to 40V, output switch current up to 1.5A, maximum switching frequency 100kHz with typical operating frequency of 33kHz, typical efficiency 87.7%, and maximum power dissipation 625mW.
The MC33063A series is specifically designed for Step-Down, Step-Up, and Voltage-Inverting applications with a minimum number of external components — only a few inductors, capacitors, diodes, and resistors are needed. The chip features low standby current, adjustable current limit, and output switch current limiting, in a SOIC-8 (3.90mm width) surface-mount package with MSL Level 1 (Unlimited) and RoHS3 compliance. onsemi provides application notes AN920A/D and AN954/D with detailed design calculations and circuit examples.
| Model | MC33063ADR2G |
| Series | MC33063A |
| Device Type | DC-DC Switching Regulator Controller |
| Topology | Buck, Boost, Inverting |
| Input Voltage Range | 3.0V ~ 40V |
| Output Voltage Range | 1.25V ~ 40V (Adjustable) |
| Output Switch Current | 1.5 A (Peak) |
| Switching Frequency | Up to 100 kHz (Typical 33 kHz) |
| Internal Reference | 1.25V (2% Precision) |
| Efficiency (Typical) | 87.7% |
| Max Power Dissipation | 625 mW |
| Number of Outputs | 1 |
| Output Type | Adjustable |
| Synchronous Rectifier | No |
| Switch | Built-in |
| Protection | Adjustable Current Limit, Output Switch Current Limiting |
| Operating Temp (TA) | -40℃ ~ +85℃ (Industrial) |
| Storage Temp | -65℃ ~ +150℃ |
| Package | SOIC-8 (0.154", 3.90mm Width) |
| Dimensions | 5mm × 4mm × 1.5mm |
| Mounting Type | Surface Mount |
MC33063ADR2G Typical Applications
Industrial automation equipment power supplies (12V to 5V, 24V to 12V, etc.)
Automotive electronics power supply (with NCV33063A automotive version for higher temperature requirements)
Outdoor equipment and security monitoring power supplies
Boost converters: 3.7V Li-ion to 5V/12V
Voltage-inverting converters: positive to negative voltage
Portable 12V SLA battery chargers
DC energy harvesting chargers
Fan controllers and DC-DC power modules
FAQ
Q: What is the difference between MC33063ADR2G and MC34063ADR2G?
A: Both are functionally identical, with the primary difference being operating temperature range: MC33063ADR2G is -40℃ to +85℃ (industrial grade), suitable for industrial automation, automotive electronics, and outdoor equipment; MC34063ADR2G is 0℃ to +70℃ (commercial grade), suitable for consumer electronics and indoor applications. Select based on application environment temperature requirements.
Q: What topologies are supported?
A: Three basic topologies: Step-Down (Buck), Step-Up (Boost), and Voltage-Inverting. Different external component configurations enable positive output, negative output, and outputs above or below the input voltage.
Q: What is the maximum output current?
A: Output switch current reaches 1.5A (peak), with actual average output current depending on thermal and external component design. Peak current capability is adjustable via external resistor current limit threshold.
Q: How is the switching frequency set?
A: Switching frequency is determined by the timing capacitor connected to the CT pin (pin 3). Smaller capacitor values yield higher switching frequencies, up to 100kHz maximum, with typical operating frequency of 33kHz. Refer to onsemi application note AN920A/D for calculation formulas.
Q: Does the chip require external compensation?
A: The MC33063A series integrates an internal temperature-compensated reference and comparator, but overall loop stability depends on external component design. onsemi application notes provide detailed compensation network design methods.
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- Part number:
- MC33063ADR2G
- Type:
- DC-DC Switching Regulator Controller
- Input Voltage Range:
- 3.0V ~ 40V
- Output Voltage Range:
- 1.25V ~ 40V
- Output Switch Current:
- 1.5 A
- Max Power Dissipation:
- 625 mW
- Output Type:
- Adjustable
- Switch:
- Built-in
- Operating Temp (TA):
- -40°C ~ +85°C
- Storage Temp:
- -65°C ~ +150°C
