DC-DC Converter Control Circuits MC34063A
● OUTPUT SWITCH CURRENT IN EXCESS OF 1.5A
● 2% REFERENCE ACCURACY
● LOW QUIESCENT CURRENT:2.5mA(TYP.)
● OPERATING FROM 3V TO 40V
● REQUENCY OPERATION TO 100KHz
● ACTIVE CURRENT LIMITING
DESCRIPTION
The MC34063A 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 devices series is designed for Step-Down, Step-Up and Voltage-lnverting applications.
ABSOLUTE MAXIMUM RATINGS
| SYMBOL |
PARAMETER |
VALUE |
UNIT |
| Vcc |
Power Supply Voltage |
50 |
V |
| Vir |
Comparator input Voltage Range |
-0.3 to 40 |
V |
| VSWC |
Switch Collector Voltage |
40 |
V |
| VSWE |
Switch Emitter Voltage (VSWC=40V) |
40 |
V |
| VCE |
Switch Collector to Emitter Voltage |
40 |
V |
| Vdc |
Driver Collector Voltage |
40 |
V |
| Idc |
Driver Collector Current |
100 |
mA |
| Isw |
Switch Current |
1.5 |
A |
| Ptot |
Power Dissipation at Tamb=25℃(for Plastic Package )
(for SOIC Package )
|
1.25
0.625
|
W |
| Top |
Operating Ambient Temperature Range |
0 to 70 |
℃ |
| Tstg |
Storage Temperature Range |
-40 to 150 |
℃ |
Absolute Maximum Rating are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
ORDERING INFORMATION
| Device |
Package |
| MC34063AD |
8 SOP |
| MC34063AN |
8 DIP |
8 SOP/ 8 DIP PIN Configulation
BLOCK DIAGRAM
Product Tags:
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