NCP3063BDR2G Step-Up/Down/Inverting Switching Regulator IC 3V-40V Input 1.5A 150kHz SOIC-8

NCP3063BDR2G Product Overview

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.

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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