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MC34063A



Motorola Semiconductors 로고
Motorola Semiconductors
34063AP1 데이터시트, 핀배열, 회로
DC-to-DC Converter
Control Circuits
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 incorporated in
www.DataSheet4SUt.ecpomDown and Step–Up and Voltage–Inverting applications with a
minimum number of external components. Refer to Application Notes
AN920A/D and AN954/D for additional design information.
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
Order this document by MC34063A/D
MC34063A
MC33063A
DC–to–DC CONVERTER
CONTROL CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Representative Schematic Diagram
Drive 8
Collector
Ipk 7
Sense
6
VCC
Comparator 5
Inverting
Input
S Q Q2
R
100
Q1
Ipk
Oscillator
CT
Comparator
+ 1.25 V
Reference
Regulator
1
Switch
Collector
2 Switch
Emitter
3 Timing
Capacitor
4
Gnd
(Bottom View)
This device contains 51 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
PIN CONNECTIONS
Switch
Collector
Switch
Emitter
1
2
Timing 3
Capacitor
Gnd 4
8
Driver
Collector
7 Ipk Sense
(Top View)
6 VCC
Comparator
5 Inverting
Input
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33063AD
SO–8
TA = – 40° to +85°C
MC33063AP1
Plastic DIP
MC33063AVD
SO–8
TA = –40° to +125°C
MC33063AVP
Plastic DIP
MC34063AD
MC34063AP1
TA = 0° to +70°C
SO–8
Plastic DIP
© Motorola, Inc. 1996
Rev 5
1


34063AP1 데이터시트, 핀배열, 회로
MC34063A MC33063A
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (VPin 1 = 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 1)
Switch Current
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
TA = 25°C
www.DataSheet4U.comThermal Resistance
SOIC Package, D Suffix
TA = 25°C
Thermal Resistance
Operating Junction Temperature
Operating Ambient Temperature Range
MC34063A
MC33063AV
MC33063A
Storage Temperature Range
VCC
VIR
VC(switch)
VE(switch)
VCE(switch)
VC(driver)
IC(driver)
ISW
40
– 0.3 to + 40
40
40
40
40
100
1.5
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A
PD
RθJA
PD
RθJA
TJ
TA
Tstg
1.25 W
100 °C/W
625
160
+150
0 to +70
–40 to +125
– 40 to + 85
– 65 to +150
W
°C/W
°C
°C
°C
NOTES: 1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.)
Characteristics
Symbol
Min Typ Max Unit
OSCILLATOR
Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)
fosc 24 33 42 kHz
Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Ichg 24 35 42 µA
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Idischg
140 220 260 µA
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)
Idischg/Ichg
5.2
6.5
7.5
Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)
Vipk(sense)
250
300
350
mV
OUTPUT SWITCH (Note 4)
Saturation Voltage, Darlington Connection (Note 5)
( ISW = 1.0 A, Pins 1, 8 connected)
VCE(sat)
1.0 1.3
V
Saturation Voltage, Darlington Connection
](ISW = 1.0 A, RPin 8 = 82 to VCC, Forced β 20)
VCE(sat)
– 0.45 0.7
V
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)
hFE
50 75
Collector Off–State Current (VCE = 40 V)
IC(off)
0.01 100
µA
NOTES: 3. Tlow = 0°C for MC34063A, – 40°C for MC33063A, AV
Thigh = +70°C for MC34063A, + 85°C for MC33063A, +125°C for MC33063AV
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (300 mA) and high driver currents (30 mA),
it may take up to 2.0 µs 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:
wIC output
Forced b of output switch : IC driver – 7.0 mA *
10
*The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
2 MOTOROLA ANALOG IC DEVICE DATA




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