MC34063ABD View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
MC34063ABD Datasheet PDF : 15 Pages
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MC34063A/E
ELECTRICAL CHARACTERISTICS (Refer to the test circuits, VCC = 5V, Ta = TLOW to THIGH, unless
otherwise specified, see note 2)
OSCILLATOR
Symbol
Parameter
fOSC Frequency
Ichg Charge Currernt
Idischg Discharge Current
Idischg/Ichg Discharge to Charge
Current Ratio
Vipk(sense) Current Limit Sense Voltage
Test Conditions
Vpin5 = 0 V CT = 1 nF Ta = 25 oC
VCC = 5 to 40 V Ta = 25 oC
VCC = 5 to 40 V Ta = 25 oC
Pin 7 = VCC Ta = 25 oC
Ichg = Idischg Ta = 25 oC
Min.
24
24
140
5.2
250
Typ.
33
33
200
6.2
300
Max.
42
42
260
7.5
350
Unit
KHz
µA
µA
mV
OUTPUT SWITCH
Symbol
Parameter
VCE(sat) Saturation Voltage,
Darlington Connection
VCE(sat) Saturation Voltage
hFE
IC(off)
DC Current Gain
Collector Off-State Current
Test Conditions
ISW = 1 A Pins 1, 8 connected
ISW = 1 A Rpin8 = 82 Ω to VCC,
Forced β ~ 20
ISW = 1 A VCE = 5 V Ta = 25 oC
VCE = 40 V
Min. Typ. Max. Unit
1
1.3
V
0.45 0.7
V
50
120
0.01 100
µA
COMPARATOR
Symbol
Parameter
Vth Threshold Voltage
Regline
IIB
Threshold Voltage Line
Regulation
Input Bias Current
Test Conditions
Ta = 25 oC
Ta = TLOW to THIGH
VCC = 3 to 40 V
VIN = 0 V
Min. Typ. Max. Unit
1.225 1.25 1.275
V
1.21
1.29
V
1
5
mV
-5
-400
nA
TOTAL DEVICE
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
ICC Supply Current
VCC = 5 to 40 V CT = 1 nF
Pin 7 = VCC Vpin5 > Vth Pin 2 = GND
Remaining pins open
for MC34063A
for MC34063E
2.5
4
mA
1.5
4
mA
VSTART-UP Start-up Voltage (note 4)
Ta = 25 oC CT = 1 µF Pin 5 = 0 V
for MC34063A
2.1
V
for MC34063E
1.5
V
NOTES:
1) Maximum package power dissipation limit must be observed.
2) TLOW = 0 oC, THIGH = 70 oC (AC and EC series); TLOW = -40 oC, THIGH = 85 oC (AB series); TLOW = -40 oC, THIGH = 125 oC (EB series).
3) If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch. The resulting switch-off time may be
adversely affected. In a Darlington configuration the following output driver condition is suggested:
Forced β of output current switch = ICOUTPUT/(ICDRIVER - 1mA*) ≥ 10
* Current less due to a built in 1KΩ antileakage resistor.
4) Start-up Voltage is the minimum Power Supply Voltage at which the internal oscillator begins to work.
3/15
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