Product Summary

The MC34063A is a monolithic control circuit containing the primary functions required for DC–to–DC converter. The MC34063A consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. The The MC34063A was specifically designed to be incorporated in Step–Down and Step–Up and Voltage–Inverting applications with aminimum number of external components. Refer to Application Notes AN920A/D and AN954/D for additional design information.

Parametrics

MC34063A absolute maximum ratings: (1) Power Supply Voltage Vcc: 40Vdc; (2) Comparator Input Voltage Range Vir: -0.3 to +40 Vdc; (3) Switch Collector Voltage VC (switch) : 40Vdc; (4) Switch Emitter Voltage (Vpin=40V), VE (switch) : 40Vdc; (5) Switch Collector to Emitter Voltage Vce(switch) : 40Vdc; (6) Driver Collector Voltage, Vc (driver) : 40Vdc; (7) Driver Collector Current, Ic (driver) : 100mA; (8) Switch Current, Isw: 1.5A; (9) Power Dissipation and Thermal Characteristics Plastic Package, P, P1 Suffix: Pd: 1.25W (T=25°C) , Thermal Resistance RθJA:100°C/W, PD:625W (SOIC Package, D Suffix, TA=25°C) , Thermal Resistance RθJA: 160°C/W; (10) Operating Junction Temperature Tj: +150°C; (11) Operating Ambient Temperature Range: 0°C to 70°C; (12) Storage Temperature Range Tstg: -65°C to +150°C.

Features

MC34063A features: (1) Operation from 3.0V to 40V Input; (2) Low Standby Current; (3) Current Limiting; (4) Output Switch Current to 1.5A; (5) Output Voltage Adjustable; (6) Frequency Operation to 100kHz; (7) Precision 2% Reference.

Diagrams

MC34063A Pin Connections

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MC34063A
MC34063A

Other


Data Sheet

Negotiable 
MC34063ABD
MC34063ABD


IC REG BUCK BOOST INV ADJ 8SOIC

Data Sheet

Negotiable 
MC34063ABN
MC34063ABN

STMicroelectronics

DC/DC Switching Converters DC DC CONVERTER CONTROL CIRCUITS

Data Sheet

0-1: $0.38
1-10: $0.29
10-100: $0.25
100-250: $0.22
MC34063ABD-TR
MC34063ABD-TR

STMicroelectronics

Switching Converters, Regulators & Controllers 3.0 to 40V DC-DC Cnv

Data Sheet

0-1: $0.85
1-10: $0.74
10-100: $0.58
100-250: $0.50
MC34063ACD-TR
MC34063ACD-TR

STMicroelectronics

Switching Converters, Regulators & Controllers 3.0 to 40V DC-DC Cnv

Data Sheet

0-1: $0.26
1-25: $0.23
25-100: $0.20
100-250: $0.18
MC34063ACD
MC34063ACD

STMicroelectronics

Switching Converters, Regulators & Controllers 3.0 to 40V DC-DC Cnv

Data Sheet

Negotiable 
MC34063ADR
MC34063ADR

Texas Instruments

DC/DC Switching Regulators 1.5-A Boost/Buck Inverting Swtch Reg

Data Sheet

0-1: $0.39
1-25: $0.27
25-100: $0.23
100-250: $0.20
MC34063ADE4
MC34063ADE4

Texas Instruments

DC/DC Switching Regulators 1.5-A Boost/Buck Inverting Swtch Reg

Data Sheet

0-1: $0.40
1-25: $0.31
25-100: $0.27
100-250: $0.23