© Semiconductor Components Industries, LLC, 2007
February, 2007 − Rev. 19 1Publication Order Number:
MC34063A/D
MC34063A, MC33063A,
NCV33063A
1.5 A, Step−Up/Down/
Inverting Switching
Regulators
The MC34063A Series is a monolithic control circuit containing the
primary functions required for DC−to−DC converters. These devices
consist of a n 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.
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
•Pb−Free Packages are Available
Figure 1. 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.
SOIC−8
D SUFFIX
CASE 751
PDIP−8
P, P1 SUFFIX
CASE 626
1
8
1
8
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
1
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
Driver
Collector
Ipk Sense
VCC
Comparator
Inverting
Input
(Top View)
2
3
45
6
7
8
PIN CONNECTIONS
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x = 3 or 4
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G= Pb−Free Package
1
8
3x063AP1
AWL
YYWWG
1
8
33063AVP
AWL
YYWWG
3x063
ALYWA
G
1
8
MARKING
DIAGRAMS
MC34063A, MC33063A, NCV33063A
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2
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 Dis sipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
TA = 25°C PD1.25 W
Thermal Resistance RqJA 100 °C/W
SOIC Package, D Suffix
TA = 25°C PD625 mW
Thermal Resistance RqJA 160 °C/W
Operating Junction Temperature TJ+150 °C
Operating Ambient Temperature Range TA°C
MC34063A 0 to +70
MC33063AV, NCV33063A −40 to +125
MC33063A −40 to +85
Storage Temperature Range Tstg −65 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Maximum package power dissipation limits must be observed.
2. This device series contains ESD protection and exceeds the following tests: Human Body Model 4000 V per MIL−STD−883, Method 3015.
Machine Model Method 400 V.
3. NCV prefix is for automotive and other applications requiring site and change control.
MC34063A, MC33063A, NCV33063A
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3
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 4], 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 mA
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) Idischg 140 220 260 mA
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 5)
Saturation Voltage, Darlington Connection
(ISW = 1.0 A, Pins 1, 8 connected) VCE(sat) − 1.0 1.3 V
Saturation Voltage (Note 6)
(ISW = 1.0 A, RPin 8 = 82 W to VCC, Forced b ] 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 mA
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
MC33063AV, NCV33063A
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
4. Tlow = 0°C for MC34063A, −40°C for MC33063A, AV, NCV33063A
Thigh = +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV, NCV33063A
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
6. 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 ms 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:
Forced bof output switch : ICoutput
ICdriver – 7.0 mA * w10
*The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
MC34063A, MC33063A, NCV33063A
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4
ton
VCC = 5.0 V
Pin 7 = VCC
Pin 5 = GND
TA = 25°C
toff
Figure 2. Output Switch On−Off Time versus
Oscillator Timing Capacitor Figure 3. 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)
on−off μ
t
10 ms/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
Figure 4. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current Figure 5. Common Emitter Configuration Outpu
t
Switch Saturation Voltage versus
Collector Current
Figure 6. Current Limit Sense Voltage
versus Temperature Figure 7. 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 7)
, 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 b = 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 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 7)
7. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
MC34063A, MC33063A, NCV33063A
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5
170 mH
L
8
180
7
Rsc
0.22
6
Vin
12 V
100
+
5
R1 2.2 k
R2
47 k
SQ
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 mH
+100
Optional Filter
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
Figure 8. Step−Up Converter
MC34063A, MC33063A, NCV33063A
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6
9a. External NPN Switch 9b. External NPN Saturated Switch
(See Note 8)
8
7
6
Rsc
Vin
1
2
Vout R
R ³ 0 for
constant Vin
8. If the output switch is driven into hard saturation (non−Darlington configuration) at low switch currents (≤ 300 mA) and high driver current
s
(≥30 mA), it may take up to 2.0 ms 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 9. External Current Boost Connections for IC Peak Greater than 1.5 A
MC34063A, MC33063A, NCV33063A
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7
1.25 V
Ref
Reg
Vout
5.0 V/500 mA
1.0 mH
Vout
+100
Optional Filter
8
7
Rsc
0.33
6
Vin
25 V
100 +
R1 1.2 k
R2
3.6 k
SQ
R
Q2
Q1
Ipk
OSC CT
VCC
+
−Comp.
1
2
3
4
CT
470
pF
470 CO
+
5
L
1N5819
220 mH
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 W1.1 A
Efficiency Vin = 25 V, IO = 500 mA 83.7%
Output Ripple With Optional Filter Vin = 25 V, IO = 500 mA 40 mVpp
Figure 10. Step−Down Converter
11a. External NPN Switch 11b. External PNP Saturated Switch
8
7
6
Rsc
Vin
1
2
Vout
8
7
6
Rsc
Vin
1
2
V
Figure 11. External Current Boost Connections for IC Peak Greater than 1.5 A
MC34063A, MC33063A, NCV33063A
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8
1.25 V
Ref
Reg
Vout
−12 V/100 mA Vout
1.0 mH
+100
Optional Filter
8
7
Rsc
0.24
6
Vin
4.5 V to 6.0 V
100+
5
R2 8.2 k
SQ
R
Q2
Q1
Ipk
OSC CT
Comp.
R1
953
1
2
3
4
+1500
pF
+
−
1N5819
1000 mf+
88 mH
VCC
CO
L
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 W910 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
Figure 12. Voltage Inverting Converter
13a. External NPN Switch 13b. External PNP Saturated Switch
8
7
6
Vin
1
2
Vout
8
7
6
Vin
1
2
Vout
Figure 13. External Current Boost Connections for IC Peak Greater than 1.5 A
3
4
+
3
4
+
MC34063A, MC33063A, NCV33063A
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9
5.45′′
2.500′′
(Top view, copper foil as seen through the board from the component side)
(Top View, Component Side) *Optional Filter.
Figure 14. Printed Circuit Board and Component Layout
(Circuits of Figures 8, 10, 12)
MC34063A MC34063A MC34063A
INDUCTOR DATA
Converter Inductance (mH) Turns/Wire
Step−Up 170 38 Turns of #22 AWG
Step−Down 220 48 Turns of #22 AWG
Voltage−Inverting 88 28 Turns of #22 AWG
All inductors are wound on Magnetics Inc. 55117 toroidal core.
MC34063A, MC33063A, NCV33063A
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10
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) ǒton
toff )1Ǔ2Iout(max) 2Iout(max) ǒton
toff )1Ǔ
Rsc 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch)
L(min) ǒ(Vin(min) *Vsat)
Ipk(switch) Ǔton(max) ǒ(Vin(min) *Vsat *Vout)
Ipk(switch) Ǔton(ma
x)
ǒ(Vin(min) *Vsat)
Ipk(switch) Ǔton(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 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 ǒ1)R2
R1Ǔ
Figure 15. Design Formula Table
MC34063A, MC33063A, NCV33063A
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11
ORDERING INFORMATION
Device Package Shipping†
MC33063AD SOIC−8 98 Units / Rail
MC33063ADG SOIC−8
(Pb−Free) 98 Units / Rail
MC33063ADR2 SOIC−8 2500 Units / Tape & Reel
MC33063ADR2G SOIC−8
(Pb−Free) 2500 Units / Tape & Reel
MC33063AP1 PDIP−8 50 Units / Rail
MC33063AP1G PDIP−8
(Pb−Free) 50 Units / Rail
MC33063AVD SOIC−8 98 Units / Rail
MC33063AVDG SOIC−8
(Pb−Free) 98 Units / Rail
MC33063AVDR2 SOIC−8
2500 Units / Tape & Reel
MC33063AVDR2G SOIC−8
(Pb−Free)
NCV33063AVDR2* SOIC−8
NCV33063AVDR2G* SOIC−8
(Pb−Free)
MC33063AVP PDIP−8 50 Units / Rail
MC33063AVPG PDIP−8
(Pb−Free) 50 Units / Rail
MC34063AD SOIC−8 98 Units / Rail
MC34063ADG SOIC−8
(Pb−Free) 98 Units / Rail
MC34063ADR2 SOIC−8 2500 Units / Tape & Reel
MC34063ADR2G SOIC−8
(Pb−Free) 2500 Units / Tape & Reel
MC34063AP1 PDIP−8 50 Units / Rail
MC34063AP1G PDIP−8
(Pb−Free) 50 Units / Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
*NCV33063A: Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and
change control.
MC34063A, MC33063A, NCV33063A
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12
PACKAGE DIMENSIONS
SOIC−8 NB
D SUFFIX
CASE 751−07
ISSUE AG
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
1.52
0.060
7.0
0.275
0.6
0.024 1.270
0.050
4.0
0.155
ǒmm
inchesǓ
SCALE 6:1
SEATING
PLANE
1
4
58
N
J
X 45_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION 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.
6. 751−01 THRU 751−06 ARE OBSOLETE. NEW
STANDARD IS 751−07.
A
BS
D
H
C
0.10 (0.004)
DIM
AMIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B3.80 4.00 0.150 0.157
C1.35 1.75 0.053 0.069
D0.33 0.51 0.013 0.020
G1.27 BSC 0.050 BSC
H0.10 0.25 0.004 0.010
J0.19 0.25 0.007 0.010
K0.40 1.27 0.016 0.050
M0 8 0 8
N0.25 0.50 0.010 0.020
S5.80 6.20 0.228 0.244
−X−
−Y−
G
M
Y
M
0.25 (0.010)
−Z−
Y
M
0.25 (0.010) ZSXS
M
____
MC34063A, MC33063A, NCV33063A
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13
PACKAGE DIMENSIONS
PDIP−8
P, P1 SUFFIX
CASE 626−05
ISSUE L
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.
14
58
F
NOTE 2 −A−
−B−
−T−
SEATING
PLANE
H
J
GDK
N
C
L
M
M
A
M
0.13 (0.005) B M
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A9.40 10.16 0.370 0.400
B6.10 6.60 0.240 0.260
C3.94 4.45 0.155 0.175
D0.38 0.51 0.015 0.020
F1.02 1.78 0.040 0.070
G2.54 BSC 0.100 BSC
H0.76 1.27 0.030 0.050
J0.20 0.30 0.008 0.012
K2.92 3.43 0.115 0.135
L7.62 BSC 0.300 BSC
M−−− 10 −−− 10
N0.76 1.01 0.030 0.040
__
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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC 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 special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC 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. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its of ficers, employees, subsidiaries, affiliates,
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MC34063A/D
SENSEFET is a trademark of Semiconductor Components Industries, LLC.
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