MC34063 SOP-8 Switching Regulator IC

The MC34063A Series is a monolithic control circuit containing the primary functions required for dc-to-dc converters. These Buck Boost Inverting Switching Regulators consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step down (Buck), Step up (Boost) and Voltage-Inverting applications with a minimum number of external components. Refer to Application Notes AN920A/D and AN954/D for additional design information. The MC33063 is an extended temperature version. The NCV33063 is an extended temp version for automotive.

 

Operation from 3.0 V to 40 V Input

Low Standby Current

Current Limiting

Output Switch Current to 1.5 A

Output Voltage Adjustable

Frequency Operation to 100 kHz

Precision 2% Reference

 

• Wide input voltage range usable for many applications
• <100uA Collector Off-State Current
• Adjustable current limit provides improved protection
• Large 1.5A peak current capability provides up to ~1A of average current output
• External resistor divider for various output voltage options
• Accurate system level performance
• Optimize frequency for size or efficiency
• Exposed pad package allows for higher output current and improved thermal performance

Application

• For Higher Switching Frequency See NCP3063
• For Dedicated ENABLE Pin and Higher Switching Frequency See NCP3064
• Fan Controller
• DC-DC Power Supply