Step Down / Step Up / Inverting DC-DC Converter
ELECTRICAL CHARACTERISTICS
V
CC
= 5V, T
A
= -40°C to 85°C, unless otherwise specified.
MC34063C
SYMBOL
OSCILLATOR
F
OSC
I
CHG
I
DISCHG
I
DISCHG
/I
CHG
V
IPK(SENSE)
PARAMETER
Test Conditions
MIN.
TYP.
MAX.
UNIT
Frequency
Charge Current
Discharge Current
Discharge to Charge
Current Ratio
Current Limit Sense
Voltage
Vpin5= 0V ,C
T
= 100pF ,T
A
= 25°C
V
CC
= 5 to 40V, T
A
= 25°C
V
CC
= 5 to 40V, T
A
= 25°C
Pin 7 = V
CC
, T
A
= 25°C
I
CHG
= I
DISCHG
, T
A
= 25°C
170
30
180
5.2
250
180
38
240
6.5
300
190
45
290
7.5
350
kHz
uA
uA
mV
Output Switch
(Note 3)
V
CE(SAT)
V
CE(SAT)
h
FE
I
C(OFF)
Saturation Voltage,
Darlington connection
Saturation Voltage
(Note 4)
DC Current Gain
Collector Off-state Current
I
SW
= 1A , Pins 1,8 connected
I
SW
= 1A, R
pin8
= 82Ω to V
CC
,
Forced
β
~ 20
I
SW
= 1A, V
CE
= 5V, T
A
= 25°C
V
CE
= 40V
50
1
0.45
75
0.01
100
uA
1.3
0.8
V
V
Comparator
V
TH
Threshold Voltage
Threshold Voltage Line
Regulation
Input Bias Current
T
A
= 25°C
T
A
= T
LOW
to T
HIGH
REG
Line
I
IB
V
CC
= 3 to 40V
V
IN
=0V
1.225
1.21
1.4
-20
1.25
1.275
1.29
5
-400
V
V
mV
nA
TOTAL DEVICE
I
CC
Supply Current
V
CC
= 5 to 40V, C
T
= 1nF,
Pin7 = V
CC
. Vpin5 > V
TH
,
Pin2 = GND, Other pins open
-
-
4
mA
Note 1. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended
Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.
Note 2. Maximum package power dissipation limits must be observed.
Note 3. Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient temperature as possible.
Note 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 2.0us for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz,
and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot
saturate. If a non-Darlington configuration is used, the following output drive condition is recommended:
Forced
β
of output switch :
Ι
C(OUTPUT)
Ι
C(DRIVER)
- 7.0mΑ *
≥
10
* The 100Ω resistor in the emitter of the driver device requires about 7 mA before the output switch conducts.
Apr. 2011 - Rev.1.2
-
4
-
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
