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.
PART NUMBER | PACKAGE (PIN) | BODY SIZE |
---|---|---|
MC3x063A | SOIC (8) | 4.90 mm × 3.91 mm |
SON (8) | 4.00 mm × 4.00 mm | |
PDIP (8) | 9.81 mm × 6.35 mm |
Changes from M Revision (January 2011) to N Revision
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
Switch Collector | 1 | I/O | High-current internal switch collector input. |
Switch Emitter | 2 | I/O | High-current internal switch emitter output. |
Timing Capacitor | 3 | — | Attach a timing capacitor to change the switching frequency. |
GND | 4 | — | Ground |
Comparator Inverting Input | 5 | I | Attach to a resistor divider network to create a feedback loop. |
VCC | 6 | I | Logic supply voltage. Tie to VIN. |
IPK | 7 | I | Current-limit sense input. |
Driver Collector | 8 | I/O | Darlington pair driving transistor collector input. |