MC33063AVP Plastic DIP
Order this document by MC34063A/D
DC–to–DC CONVERTER
CONTROL CIRCUITS
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
PIN CONNECTIONS
SEMICONDUCTOR
TECHNICAL DATA
8
1
1
8
1
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
Ipk Sense
VCC
Comparator
Inverting
Input
(Top View)
Device Operating
Temperature Range Package
ORDERING INFORMATION
MC33063AD
MC33063AP1 TA = – 40° to +85°CSO–8
Plastic DIP
MC33063AVD TA = –40° to +125°CSO–8
2
3
45
6
7
8
MC34063AD SO–8
MC34063AP1 TA = 0° to +70°CPlastic DIP
1
MOTOROLA ANALOG IC DEVICE DATA
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
Step–Down 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
Representative Schematic Diagram
SQ
R
Q2 Q1
100
Ipk
Oscillator CT
Comparator
+
–
1.25 V
Reference
Regulator
1
2
3
45
6
7
8
Drive
Collector
Ipk
Sense
VCC
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
(Bottom View)
This device contains 51 active transistors.
Motorola, Inc. 1996 Rev 5
MC34063A MC33063A
2MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Voltage VCC 40 Vdc
Comparator Input Voltage Range VIR –0.3 to +40 Vdc
Switch Collector Voltage VC(switch) 40 Vdc
Switch Emitter Voltage (VPin 1 = 40 V) VE(switch) 40 Vdc
Switch Collector to Emitter Voltage VCE(switch) 40 Vdc
Driver Collector Voltage VC(driver) 40 Vdc
Driver Collector Current (Note 1) IC(driver) 100 mA
Switch Current ISW 1.5 A
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
TA = 25°C PD1.25 W
Thermal Resistance RθJA 100 °C/W
SOIC Package, D Suffix
TA = 25°C PD625 W
Thermal Resistance RθJA 160 °C/W
Operating Junction Temperature TJ+150 °C
Operating Ambient Temperature Range TA°C
MC34063A 0 to +70
MC33063AV –40 to +125
MC33063A –40 to +85
Storage Temperature Range Tstg –65 to +150 °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 V oltage, Darlington Connection
(ISW = 1.0 A, RPin 8 = 82 Ω 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:
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
b
of output switch : ICoutput
ICdriver – 7.0 mA *
w
10
MC34063A MC33063A
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.)
Characteristics UnitMaxTypMinSymbol
COMPARATOR
Threshold Voltage
TA = 25°C
TA = Tlow to Thigh
Vth 1.225
1.21 1.25
–1.275
1.29
V
Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V)
MC33063A, MC34063A
MC33363AV
Regline –
–1.4
1.4 5.0
6.0
mV
Input Bias Current (Vin = 0 V) IIB ––20 –400 nA
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) ICC – – 4.0 mA
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:
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
b
of output switch : ICoutput
ICdriver – 7.0 mA *
w
10
ton
VCC = 5.0 V
Pin 7 = VCC
Pin 5 = Gnd
TA = 25
°
C
toff
Figure 1. Output Switch On–Off Time versus
Oscillator Timing Capacitor Figure 2. Timing Capacitor Waveform
0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10
CT, OSCILLAT OR TIMING CAPACITOR (nF)
, OUTPUT SWITCH ON-OFF TIME ( s)
on–off
µ
t
10
µ
s/DIV
, OSCILLATOR VOLTAGE (V)
OSC
200 mV/DIV
V
VCC = 5.0 V
Pin 7 = VCC
Pin 2 = Gnd
Pins 1, 5, 8 = Open
CT = 1.0 nF
TA = 25
°
C
1000
500
200
100
50
20
10
5.0
2.0
1.0
MC34063A MC33063A
4MOTOROLA ANALOG IC DEVICE DATA
Figure 3. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
Figure 4. Common Emitter Configuration Output
Switch Saturation Voltage versus
Collector Current
Figure 5. Current Limit Sense Voltage
versus Temperature Figure 6. Standby Supply Current versus
Supply Voltage
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
, SATURATION VOLTAGE (V)
CE(sat)
IE, EMITTER CURRENT (A)
V
VCC = 5.0 V
Pins 1, 7, 8 = VCC
Pins 3, 5 = Gnd
TA = 25
°
C
(See Note 4)
, SATURATION VOLTAGE (V)
CE(sat)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IC, COLLECTOR CURRENT(A)
V
Darlington Connection
Forced
β
= 20
–55 –25 0 25 50 75 100 125
, CURRENT LIMIT SENSE VOLTAGE (V)
IPK(sense)
TA, AMBIENT TEMPERATURE (
°
C)
V
VCC = 5.0 V
Ichg = Idischg
0 5.0 10 15 20 25 30 35 40
, SUPPLY CURRENT (mA)
CC
VCC, SUPPLY VOL TAGE (V)
I
CT = 1.0 nF
Pin 7 = VCC
Pin 2 = Gnd
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
400
380
360
340
320
300
280
260
240
220
200
3.6
3.2
2.4
2.0
1.6
1.2
0.8
0.4
0
1.0
2.8
VCC = 5.0 V
Pin 7 = VCC
Pins 2, 3, 5 = Gnd
TA = 25
°
C
(See Note 4)
NOTE: 4.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
MC34063A MC33063A
5
MOTOROLA ANALOG IC DEVICE DATA
170
µ
H
L
8
180
7
Rsc
0.22
6
Vin
12 V
100
+
5
R1 2.2 k
R2
47 k
SQ
RQ2 Q1
Ipk Osc
CT
VCC
+
–Comp. 1.25 V
Ref
Reg
1
2
3
4
1N5819
CT
1500
pF
330 CO+
Vout
28 V/175 mA Vout
1.0
µ
H
+100
Optional Filter
Figure 7. Step–Up Converter
Test Conditions Results
Line Regulation Vin = 8.0 V to 16 V, IO = 175 mA 30 mV = ±0.05%
Load Regulation Vin = 12 V, IO = 75 mA to 175 mA 10 mV = ±0.017%
Output Ripple Vin = 12 V, IO = 175 mA 400 mVpp
Efficiency Vin = 12 V, IO = 175 mA 87.7%
Output Ripple With Optional Filter Vin = 12 V, IO = 175 mA 40 mVpp
8a. External NPN Switch 8b. External NPN Saturated Switch
(See Note 5)
8
7
6
Rsc
Vin
1
2
Vout R
R
³
0 for
constant Vin
NOTE: 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 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.
8
7
6
Rsc
Vin
1
2
Vout
Figure 8. External Current Boost Connections for IC Peak Greater than 1.5 A
MC34063A MC33063A
6MOTOROLA ANALOG IC DEVICE DATA
1.25 V
Ref
Reg
Vout
5.0 V/500 mA
1.0
µ
H
Vout
+100
Optional Filter
8
7
Rsc
0.33
6
Vin
25 V 100 +
R1 1.2 k
R2
3.6 k
SQ
RQ2 Q1
Ipk Osc CT
VCC
+
–Comp.
1
2
3
4
CT
470
pF
470 CO
+
5
L
1N5819
220
µ
H
Figure 9. Step–Down Converter
Test Conditions Results
Line Regulation Vin = 15 V to 25 V, IO = 500 mA 12 mV = ±0.12%
Load Regulation Vin = 25 V, IO = 50 mA to 500 mA 3.0 mV = ±0.03%
Output Ripple Vin = 25 V, IO = 500 mA 120 mVpp
Short Circuit Current Vin = 25 V, RL = 0.1 Ω1.1 A
Efficiency Vin = 25 V, IO = 500 mA 83.7%
Output Ripple With Optional Filter Vin = 25 V, IO = 500 mA 40 mVpp
10a. External NPN Switch 10b. External PNP Saturated Switch
8
7
6
Rsc
Vin
1
2Vout
8
7
6
Rsc
Vin
1
2
Vout
Figure 10. External Current Boost Connections for IC Peak Greater than 1.5 A
MC34063A MC33063A
7
MOTOROLA ANALOG IC DEVICE DATA
1.25 V
Ref
Reg
Vout
–12 V/100 mA Vout
1.0
µ
H
+100
Optional Filter
8
7
Rsc
0.24 6
Vin
4.5 V to 6.0 V100+
5
R2 8.2 k
SQ
RQ2 Q1
Ipk Osc CT
Comp.
R1
953
1
2
3
4
+1500
pF
+
–1N5819
1000
µ
f+
88
µ
H
VCC
CO
L
Figure 11. Voltage Inverting Converter
Test Conditions Results
Line Regulation Vin = 4.5 V to 6.0 V, IO = 100 mA 3.0 mV = ±0.012%
Load Regulation Vin = 5.0 V, IO = 10 mA to 100 mA 0.022 V = ±0.09%
Output Ripple Vin = 5.0 V, IO = 100 mA 500 mVpp
Short Circuit Current Vin = 5.0 V, RL = 0.1 Ω910 mA
Efficiency Vin = 5.0 V, IO = 100 mA 62.2%
Output Ripple With Optional Filter Vin = 5.0 V, IO = 100 mA 70 mVpp
12a. External NPN Switch 12b. External PNP Saturated Switch
8
7
6
Vin
1
2Vout
8
7
6
Vin
1
2
Vout
Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A
MC34063A MC33063A
8MOTOROLA ANALOG IC DEVICE DATA
5.45
′′
2.500
′′
(Top view , copper foil as seen through the board from the component side)
(Top View , Component Side)
*Optional Filter.
Figure 13. Printed Circuit Board and Component Layout
(Circuits of Figures 7, 9, 11)
MC34063A MC34063A MC34063A
INDUCTOR DATA
Converter Inductance (µH) Turns/Wire
Step–Up 170 38 T urns of #22 AWG
Step–Down 220 48 T urns of #22 AWG
Voltage–Inverting 88 28 T urns of #22 AWG
All inductors are wound on Magnetics Inc. 55117 toroidal core.
MC34063A MC33063A
9
MOTOROLA ANALOG IC DEVICE DATA
Figure 14. Design Formula Table
Calculation Step–Up Step–Down Voltage–Inverting
ton/toff Vout
)
VF
*
Vin(min)
Vin(min)
*
Vsat
Vout
)
VF
Vin(min)
*
Vsat
*
Vout
|Vout|
)
VF
Vin
*
Vsat
(ton + toff)1
f1
f1
f
toff ton
)
toff
ton
toff
)
1
ton
)
toff
ton
toff
)
1
ton
)
toff
ton
toff
)
1
ton (ton + toff) – toff (ton + toff) – toff (ton + toff) – toff
CT4.0 x 10–5 ton 4.0 x 10–5 ton 4.0 x 10–5 ton
Ipk(switch) 2Iout(max)
ǒ
ton
toff
)
1
Ǔ
2Iout(max) 2Iout(max)
ǒ
ton
toff
)
1
Ǔ
Rsc 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch)
L(min)
ǒ
(Vin(min)
*
Vsat)
Ipk(switch)
Ǔ
ton(max)
ǒ
(Vin(min)
*
Vsat
*
Vout)
Ipk(switch)
Ǔ
ton(max)
ǒ
(Vin(min)
*
Vsat)
Ipk(switch)
Ǔ
ton(max)
CO9Ioutton
Vripple(pp)
Ipk(switch)(ton
)
toff)
8Vripple(pp) 9Ioutton
Vripple(pp)
Vsat = Saturation voltage of the output switch.
VF = Forward voltage drop of the output rectifier.
The following power supply characteristics must be chosen:
Vin – Nominal input voltage.
Vout – Desired output voltage,
Iout – Desired output current.
fmin – Minimum desired output switching frequency at the selected values of Vin and IO.
Vripple(pp) – Desired peak–to–peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its equivalent series
Vripple(pp) – resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation.
NOTE: For further information refer to Application Note AN920A/D and AN954/D.
|Vout|
+
1.25
ǒ
1
)
R2
R1
Ǔ
MC34063A MC33063A
10 MOTOROLA ANALOG IC DEVICE DATA
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626–05
ISSUE K
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SO–8)
ISSUE P
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
MIN MINMAX MAX
MILLIMETERS INCHES
DIM 9.40
6.10
3.94
0.38
1.02
0.76
0.20
2.92
—
0.76
10.16
6.60
4.45
0.51
1.78
1.27
0.30
3.43
0.370
0.240
0.155
0.015
0.040
0.030
0.008
0.115
—
0.030
0.400
0.260
0.175
0.020
0.070
0.050
0.012
0.135
10
°
1.01
2.54 BSC
7.62 BSC
0.100 BSC
0.300 BSC
A
B
C
D
F
G
H
J
K
L
M
N10
°
0.040
F
HG
D
N
C
KM
J
L
NOTE 2
14
58
T
0.13 (0.005) AB
M M M
–A–
–B–
–T–
SEATING
PLANE
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
SEATING
PLANE
14
58
C
K
4X P
A0.25 (0.010) MTBSS
0.25 (0.010) MBM
8X D
R
MJ
X 45
_
_
F
–A–
–B–
–T–
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A4.80 5.00 0.189 0.196
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.18 0.25 0.007 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019
____
MC34063A MC33063A
11
MOTOROLA ANALOG IC DEVICE DATA
NOTES
MC34063A MC33063A
12 MOTOROLA ANALOG IC DEVICE DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
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Opportunity/Af firmative Action Employer.
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MC34063A/D
*MC34063A/D*
◊
