The MC34063A/B series is a monolithic control circuit delivering the main functions for DC-DC voltage converting.

The device contains an intermal temperature compensated reference, comparator, duty cycle controlled oscillator with an active current limit circuit driver and high current output switch.

Output voltage is adjustable through two external resistors with a 2% reference accuracy.

Employing a minimum number of external components the MC34063A/B devices series is designed for Step-Down, Step-Up and Voltage-Inverting applications.

Features:

• Output switch current in excess of 1.5a
• 2% reference accuracy
• Low quiescent current: 2.5ma(typ.)
• Operating from 3v to 40v
• Frequency operation to 100khz
• Active current limiting
• Moisture sensitivity level 3

The MC34063C is a monolithic switching regulator control circuit containing the primary functions required for DC-DC converters.

This device consists of internal temperature compenssated reference, voltage comparator, cotrolled duty cycle oscillator with active current. The device is specifically designed to be used in Step-Down, Step-Up and Voltage-Inverting applications with a minimum number of external components.

The MC34063C is the enhanced version of MC34063A with the ability to work in higher frequency.

The 34063C is available in 2 pcakages : SOP-8 and DIP-8.

Features:

• Operating From 3V To 40V
• Low Standby Current
• Current Limitting
• Output Switch Current to 1.2A
• Output Valtage Adjustable
• Operation Frequency up to 180KHz (CT=100pF)
• Precision 2% reference
• Moisture sensitivity level 3