The MC34063A is a monolithic regulator subsystem, intended for use as DC to DC converter.
FEATURES
*Operation from 3.0V to 40V.*Short circuit current limiting.*Low standby current.*Output switch current of 1.5A without external
ABSOLUTE MAXIMUM RATINGS(Ta=25°C )
PARAMETER | SYMBOL | VALUE | UNIT |
Supply Voltage | Vcc | 40 | V |
Comparator input voltage range | Vi(comp) | -0.3~+40 | V |
Switch collector voltage | Vc(sw) | 40 | V |
Switch Emitter Voltage | Ve(sw) | 40 | V |
Switch collector to emitter voltage | Vce(sw) | 40 | V |
Driver collector Voltage | Vc(dr) | 40 | V |
Switch current | Isw | 1.5 | A |
ELECTRICAL CHARACTERISTICS( Ta=25°C ) (Vcc=5.0V,Ta=0~70°C,unless otherwise specified)
PARAMETER | SYMBOL | TEST CONDITIONS | MIN | TYP. | MAX | UNIT |
Oscillator |
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Charging Current | Ichg | Vcc=5 to 40V,Ta=25°C | 22 | 31 | 42 | mA |
Discharging Current | Idischg | Vcc=5 to 40V,Ta=25°C | 140 | 190 | 260 | mA |
Oscillator Amplitude | Vosc | Ta=25°C |
| 0.5 |
| V |
Discharge to Charge Current Ratio | K | V7=Vcc,Ta=25°C | 5.2 | 6.1 | 7.5 |
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Current limit Sense Voltage | Vsense | Ichg=Idischg Ta=25°C | 250 | 300 | 350 | mV |
Output Switch |
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Saturation Voltage 1(note) | Vce(sat)1 | Isw=1.0A Vc(driver)=Vc(sw) |
| 0.95 | 1.3 | V |
Saturation Voltage 2(note) | Vce(sat)2 | Isw=1.0A Vc(driver)=50mA |
| 0.45 | 0.7 | V |
DC Current Gain(note) | Gi(DC) | Isw=1.0A Vce=5.0V,Ta=25°C | 50 | 180 |
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Collector Off State Current(note) | C(off) | Vce=40.0V,Ta=25°C |
| 0.01 | 100 | mA |
Comparator |
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Threshold Voltage | Vth | 1.21 | 1.24 | 1.29 | V | |
Threshold voltage Line Regulation | Vth | Vcc=3~40V |
| 2.0 | 5.0 | mV |
Input Bias Current | Ibias | Vi=0V |
| 50 | 400 | nA |
Total Device |
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Supply Current | Icc | Vcc=5~40V Ct=0.001 V7=Vcc Vc>Vth Pin2=GND |
| 2.7 | 4.0 | mA |
MC34063 DC-DC CONVERTER CONTROL CIRCUITS
