functions required. 34063 Datasheet

34063 required. Datasheet pdf. Equivalent

Part 34063
Description monolithic control circuit containing the primary functions required
Feature 34063 Description The MC34063A Series is a monolithic control circuit containing the primary functio.
Manufacture Estek Electronics
Total Page 7 Pages
Datasheet
Download 34063 Datasheet



34063
34063
Description
The MC34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters.
These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator
with an active current limit circuit, driver and high current output switch. This series was specifically designed to be
incwowrpwo.drataesdheinetS4ute.cpo-mDown and Step-Up and Voltage-Inverting applications with a minimum number of external
components.
Features
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
Plastic Package
Pin Connections
Internal Block Digram
Driver 8
Collector
Ipk 7
Sense
VCC
Comparator
Inverting
Input
6
5
SQ
R
1 Switch
Collector
Q2
Q1
Ipk
Oscillator
CT
Comparator
100
1.25 V
Reference
2 Switch
Emitter
3 Timing
Capacitor
4 Gnd
BEIJING ESTEK ELECTRONICS CO.,LTD
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34063
Absolute Maximum Ratings
Symbol
Parameter
VCC Power Supply Voltage
VIR Comparator Input Voltage Range
www.dVaCt(aswsithche) et4u.coSmwitch Collector Voltage
VE(switch)
VCE(switch)
VC(driver)
IC(driver)
ISW
Switch Emitter Voltage (VPIN1 = 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 1)
Switch Current
TJ Operating Junction Temperature
TA Operating Ambient Temperature Range
Tstg Storage Temperature Range
34063
Maximum
40
-0.3 to +40
40
40
40
40
100
1.5
+150
0 to +70
-65 to +150
Units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A
°C
°C
°C
Electrical Characteristics
(Vcc=5.0V, Ta=Tlow to Thigh , unless otherwise
specified)
Characteristics
OSCILLATOR
Frequency (Vpin5 = 0V, CT = 1.0 nF, TA = 25°C)
Charge Current(VCC = 5.0V to 40V, TA = 25°C)
Discharge Current (VCC = 5.0V to 40V, TA = 25°C)
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)
Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)
OUTPUT SWITCH (NOTE 2)
Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, 8 connected)
Saturation Voltage, Darlington Connection (ISW = 1.0 A, Rpin 8 = 82to VCC , Forced β
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)
Collector Off-State Current (VCE = 40 V)
COMPARATOR
Threshold Voltage
(TA=25°C)
(TA =Tlow to Thigh)
Threshold Voltage Line Regulation
(Vcc=3.0 V to 40 V)
Input Bias Current
(Vin=0 V)
TOTAL DEVICE
Supply Current (Vcc = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, Vpin 5 > Vth, Pin 2 =
Gnd, remaining pins open)
20)
Symbol Min Typ Max Units
fOSC
Ichg
Idischg
Idischg /
Ichg
Vipk(sence)
24 33
24 35
140 220
5.2 6.5
42
42
260
7.5
250 300 350
kHz
µA
µA
mV
VCE(sat)
VCE(sat)
hFE
IC(off)
– 1.0 1.3
– 0.45 0.7
50 75 –
– 40 100
V
V
µA
Vth
Regline
1.225 1.25 1.275
1.21 – 1.29
– 1.4 5.0
V
mV
IIB – -20 -400 nA
ICC – – 4.0 mA
NOTES : 1.Maximum package power dissipation limits must be observed.
2.Low duty cycle pulse techniques are used during test to maintain junction temperature
as close to ambient temperature as possible
BEIJING ESTEK ELECTRONICS CO.,LTD
2





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