0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
ELECTRICAL CHARACTERISTICS( Refer to the test circuits, V
CC
=5V, T
a
= -40℃ to 85℃
OSCILLATOR
SYMBOL
F
OSC
I
chg
I
dischg
I
dischg
/I
chg
V
ipk(sense)
PARAMETER
Frequency
Charge Current
Discharge Current
Discharge to Charge Current Ratio
Current Limit Sense Voltage
TEST CONDITIONS
V
pin5
= 0 V ,C
T
= 100pF ,T
a
= 25
o
V
CC
= 5 to 40V ,T
a
= 25
o
C
o
V
CC
= 5 to 40V ,T
a
= 25 C
o
Pin 7= V
CC
,T
a
= 25 C
o
I
chg
= I
dischg
,T
a
= 25 C
MIN.
170
30
180
5.2
250
TYP.
180
38
240
6.5
300
MAX. UNIT
190 KHz
45
㎂
290
㎂
7.5
350 ㎷
OUTPUT SWITCH (NOTE 3)
SYMBOL
V
CE(sat)
V
CE(sat)
h
FE
I
C(off)
PARAMETER
Saturation Voltage,
Darlington connection
Saturation Voltage (NOTE 4)
DC Current Gain
Collector Off-State Current
TEST CONDITIONS
I
SW
= 1A ,Pins 1,8 connected
I
SW
= 1A ,R
pin8
= 82Ω to V
CC
,
Forced β ~ 20
o
I
SW
= 1A, V
CE
= 5V, T
a
= 25 C
V
CE
= 40V
MIN.
TYP.
1
0.45
50
75
0.01
MAX. UNIT
1.3
V
0.8
V
100
㎂
COMPARATOR
SYMBOL
V
th
Reg
line
I
IB
PARAMETER
Threshold Voltage
Threshold Voltage Line Regulation
Input Bias Current
TEST CONDITIONS
T
a
= 25
o
C
T
a
= T
LOW
to T
HIGH
V
CC
= 3 to 40V
V
IN
= 0V
MIN.
1.225
1.21
TYP.
1.25
1.4
-20
MAX. UNIT
1.275 V
V
1.29
㎷
5
-400 ㎁
TOTAL DEVICE
SYMBOL
I
CC
PARAMETER
Supply Current
TEST CONDITIONS
MIN.
V
CC
= 5 to 40V, C
T
=1㎋
Pin7= V
CC
,V
pin5
>V
th
, Pin2=GND
Remaining pins open
for MC34063C
TYP.
2.5
MAX. UNIT
4
㎃
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 (≤300mA) and
high driver currents (
≥30mA),
it may take up to 2.0
㎲
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
HTC
3
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
