MC34063A

ACTIVE

1.5-A boost, buck, inverting switching regulator, operation from 0°C to 70°C

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Same functionality with different pin-out to the compared device
LM51581 ACTIVE 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum Higher Vout capability and higher switch current

Product details

Vin (min) (V) 3 Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 40 Features Nonsynchronous rectification Iq (typ) (µA) 4000 Duty cycle (max) (%) 80
Vin (min) (V) 3 Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.25 Vout (max) (V) 40 Features Nonsynchronous rectification Iq (typ) (µA) 4000 Duty cycle (max) (%) 80
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DRJ) 8 16 mm² 4 x 4
  • Wide Input Voltage Range: 3 V to 40 V
  • High Output Switch Current: Up to 1.5 A
  • Adjustable Output Voltage
  • Oscillator Frequency Up to 100 kHz
  • Precision Internal Reference: 2%
  • Short-Circuit Current Limiting
  • Low Standby Current
  • Wide Input Voltage Range: 3 V to 40 V
  • High Output Switch Current: Up to 1.5 A
  • Adjustable Output Voltage
  • Oscillator Frequency Up to 100 kHz
  • Precision Internal Reference: 2%
  • Short-Circuit Current Limiting
  • Low Standby Current

The MC33063A and MC34063A devices are easy-to-use ICs containing all the primary circuitry needed for building simple DC-DC converters. These devices primarily consist of an internal temperature-compensated reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and inverting topologies.

The MC33063A device is characterized for operation from –40°C to 85°C, while the MC34063A device is characterized for operation from 0°C to 70°C.

The MC33063A and MC34063A devices are easy-to-use ICs containing all the primary circuitry needed for building simple DC-DC converters. These devices primarily consist of an internal temperature-compensated reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and inverting topologies.

The MC33063A device is characterized for operation from –40°C to 85°C, while the MC34063A device is characterized for operation from 0°C to 70°C.

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Technical documentation

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Type Title Date
* Data sheet MC3x063A 1.5-A Peak Boost/Buck/Inverting Switching Regulators datasheet (Rev. N) PDF | HTML 29 Jan 2015
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Adding shutdown feature to MC33063A, MC34063A switching regulators 05 Feb 2013
Application note Application of the MC34063 Switching Regulator (Rev. B) 06 Nov 2007

Design & development

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Package Pins CAD symbols, footprints & 3D models
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
WSON (DRJ) 8 Ultra Librarian

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