Item specifics
Description
The NCP3063BDR2G is a monolithic switching regulator from onsemi, representing a higher-frequency upgrade to the widely adopted MC34063A and MC33063A DC-DC converters. It integrates a temperature-compensated reference, comparator, controlled duty-cycle oscillator with active current limit, driver, and high-current output switch in a SOIC-8 package. The device operates from a 3V to 40V input range with an adjustable output voltage of 1.25V to 40V, delivering up to 1.5A peak output current at switching frequencies up to 150kHz with 85% efficiency. Specifically designed for step-down (Buck), step-up (Boost), and voltage-inverting applications with a minimum number of external components, the NCP3063BDR2G is widely used in consumer electronics, industrial control, automotive electronics, battery chargers, and high-power LED lighting.
| Part number | NCP3063BDR2G |
| Series | NCP3063 |
| Device Type | Step-Up/Step-Down/Inverting Switching Regulator |
| Topology | Buck, Boost, Inverting |
| Control Mode | Hysteretic Current-Mode |
| Input Voltage Range | 3V ~ 40V |
| Output Voltage Range | 1.25V ~ 40V (Adjustable) |
| Output Switch Current | 1.5 A (Peak) |
| Switching Frequency | Up to 150 kHz |
| Reference Voltage Accuracy | 1.5% |
| Efficiency (Typical) | 85% |
| Number of Outputs | 1 |
| Output Type | Adjustable (Positive or Negative) |
| Synchronous Rectifier | No |
| Switch | Built-in |
| Protections | Cycle-by-Cycle Current Limiting, Internal Thermal Shutdown with Hysteresis, Overcurrent Protection |
| Operating TJ | -40℃ ~ +125℃ |
| Storage Temp | -65℃ ~ +150℃ |
| Package | SOIC-8 |
NCP3063BDR2G Applications
Consumer Electronics: Printers, DSL modems, WAN/LAN equipment power, set-top boxes, portable electronics
Industrial Control: Automation equipment, sensor power, instrumentation, power equipment
Automotive Electronics: In-vehicle power conversion, automotive electronic modules (NCV3063 variant supports -40°C to +125°C automotive temperature range)
Battery Chargers: Battery charge management circuits, portable device charging solutions
LED Lighting: High-power LED drivers, LED lighting control
General DC-DC Power: Low-power non-isolated DC-DC power, voltage inverting supplies, multi-voltage output systems
FAQ
Q: What is the difference between NCP3063BDR2G and MC34063A/MC33063A?
A: The NCP3063 series is a higher frequency upgrade to the MC34063A and MC33063A, with switching frequency increased from 33kHz to 150kHz. It adds internal thermal shutdown with hysteresis and cycle-by-cycle current limiting, with reference voltage accuracy improved to 1.5%.
Q: What topologies are supported?
A: Three basic topologies: Step-Down (Buck), Step-Up (Boost), and Voltage-Inverting. Different external component configurations enable positive or negative output.
Q: What protection features are integrated?
A: Cycle-by-Cycle Current Limiting, internal thermal shutdown with hysteresis, and overcurrent protection for device and system safety under abnormal conditions.
Q: How is the switching frequency set?
A: Switching frequency is determined by the timing capacitor connected to the Timing Capacitor pin (pin 3), with maximum operating frequency of 150kHz. onsemi provides an Excel-based design tool to assist with frequency and external component calculations.
Q: What is the operating temperature range?
A: -40℃ to +125℃ junction temperature, meeting industrial-grade environmental requirements.
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