MC33063AVP
Plastic DIP
Order this document by MC34063A/D
MC34063A
MC33063A
DCtoDC CONVERTER
CONTROL CIRCUITS
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO8)
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
C
SO8
Plastic DIP
MC33063AVD
TA = 40
to +125
C
SO8
2
3
4
5
6
7
8
MC34063AD
SO8
MC34063AP1
TA = 0
to +70
C
Plastic DIP
1
MOTOROLA ANALOG IC DEVICE DATA
DC-to-DC Converter
Control Circuits
The MC34063A Series is a monolithic control circuit containing the
primary functions required for DCtoDC 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
StepDown and StepUp and VoltageInverting 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
S Q
R
Q2
Q1
100
Ipk
Oscillator CT
Comparator
+
1.25 V
Reference
Regulator
1
2
3
4
5
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
2
MOTOROLA 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
PD
1.25
W
Thermal Resistance
R
JA
100
C/W
SOIC Package, D Suffix
TA = 25
C
PD
625
W
Thermal Resistance
R
JA
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
A
Discharge Current (VCC = 5.0 V to 40 V, TA = 25
C)
Idischg
140
220
260
A
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
]
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 OffState Current (VCE = 40 V)
IC(off)
0.01
100
A
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 (nonDarlington configuration) at low switch currents (
300 mA) and high driver currents (
30 mA),
it may take up to 2.0
s 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 nonDarlington
configuration is used, the following output drive condition is recommended:
*The 100
resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
b
of output switch :
IC output
IC driver 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
Unit
Max
Typ
Min
Symbol
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 (nonDarlington configuration) at low switch currents (
300 mA) and high driver currents (
30 mA),
it may take up to 2.0
s 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 nonDarlington
configuration is used, the following output drive condition is recommended:
*The 100
resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
b
of output switch :
IC output
IC driver 7.0 mA *
w
10
ton
VCC = 5.0 V
Pin 7 = VCC
Pin 5 = Gnd
TA = 25
C
toff
Figure 1. Output Switch OnOff 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, OSCILLATOR TIMING CAPACITOR (nF)
, OUTPUT
SWITCH ON-OFF
TIME (
s)
onof
f
t
10
s/DIV
, OSCILLA
T
OR
VOL
T
AGE (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
4
MOTOROLA 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
, SA
TURA
TION VOL
T
AGE
(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)
, SA
TURA
TION VOL
T
AGE
(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
= 20
55
25
0
25
50
75
100
125
,
CURRENT
LIMIT
SENSE VOL
T
AGE
(V)
IPK(sense)
TA, AMBIENT TEMPERATURE (
C)
V
VCC = 5.0 V
Ichg = Idischg
0
5.0
10
15
20
25
30
35
40
, SUPPL
Y
CURRENT
(mA)
CC
VCC, SUPPLY VOLTAGE (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
H
L
8
180
7
Rsc
0.22
6
Vin
12 V
100
+
5
R1
2.2 k
R2
47 k
S Q
R
Q2
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
H
+
100
Optional Filter
Figure 7. StepUp 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
0 for
constant Vin
NOTE:
5. If the output switch is driven into hard saturation (nonDarlington configuration) at low switch currents (
300 mA) and high driver currents
(
30 mA), it may take up to 2.0
s 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 nonDarlington
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
PDF 
ZIP