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| MC34063C Datasheet, PDF (3/9 Pages) HTC Korea TAEJIN Technology Co. – 0.8A Step Down / Step Up / Inverting DC-DC Converter | |||
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0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
ELECTRICAL CHARACTERISTICS( Refer to the test circuits, VCC=5V, Ta= -40â to 85â
OSCILLATOR
SYMBOL
PARAMETER
FOSC Frequency
Ichg Charge Current
Idischg Discharge Current
Idischg/Ichg Discharge to Charge Current Ratio
Vipk(sense) Current Limit Sense Voltage
TEST CONDITIONS
MIN.
Vpin5= 0 V ,CT= 100pF ,Ta= 25o 170
VCC= 5 to 40V ,Ta= 25oC
30
VCC= 5 to 40V ,Ta= 25oC
180
Pin 7= VCC ,Ta= 25oC
5.2
Ichg= Idischg ,Ta= 25oC
250
TYP.
180
38
240
6.5
300
MAX. UNIT
190 KHz
45 ã
290 ã
7.5
350 ã·
OUTPUT SWITCH (NOTE 3)
SYMBOL
PARAMETER
VCE(sat)
Saturation Voltage,
Darlington connection
VCE(sat) Saturation Voltage (NOTE 4)
hFE
IC(off)
DC Current Gain
Collector Off-State Current
TEST CONDITIONS
ISW= 1A ,Pins 1,8 connected
ISW= 1A ,Rpin8= 82⦠to VCC,
Forced β ~ 20
ISW= 1A, VCE= 5V, Ta= 25oC
VCE= 40V
MIN.
50
TYP. MAX. UNIT
1 1.3 V
0.45 0.8 V
75
0.01 100 ã
COMPARATOR
SYMBOL
PARAMETER
Vth Threshold Voltage
Regline Threshold Voltage Line Regulation
IIB Input Bias Current
TEST CONDITIONS
Ta= 25oC
Ta= TLOW to THIGH
VCC= 3 to 40V
VIN= 0V
MIN.
1.225
1.21
TYP.
1.25
1.4
-20
MAX. UNIT
1.275 V
1.29 V
5ã·
-400 ã
TOTAL DEVICE
SYMBOL
PARAMETER
ICC Supply Current
TEST CONDITIONS
MIN.
VCC= 5 to 40V, CT=1ã
Pin7= VCC ,Vpin5>Vth, Pin2=GND
Remaining pins open
for MC34063C
TYP.
2.5
MAX. UNIT
4ã
Notes:
1 Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the devic
These are stress retings only, and functional operation of the device at these or any other conditions beyond thos
indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" f
extended periods may affect device reliability.
2 Maximum package power dissipation limits must be observed.
3 Low duty cycle pulse technique are used during test to maintain juntion temperature as close to ambient
Temperature as possible.
4 If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (â¤300mA) and
high driver currents ( â¥30mA), it may take up to 2.0 ã² for it to come out of saturation. This condition will shorten
the off time at frequencies 30kHz, and is magnified at high temperatures. This condition does not occur with a
Darlington configuration, since the output switch cannot saturate.
Jan. 2007-Rev 1.0
3
HTC
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