Datasheet MC 34063 ADG Datasheet

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 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.

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

Q1

1

Switch
Collector

2

Switch
Emitter

3

Timing
Capacitor

45

GND

8

Drive

Collector

Q2

100

1.25 V

Reference

Regulator

I

Sense

V

CC

Comparator

Inverting

Input

SQ

7

pk

Oscillator

6

This device contains 51 active transistors.

R

I

pk

C

Comparator

+

−

(Bottom View)

T

Figure 1. Representative Schematic Diagram

8

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SOIC−8

8

1

1

x = 3 or 4
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = Pb−Free Package

D SUFFIX
CASE 751

PDIP−8

P, P1 SUFFIX

CASE 626

PIN CONNECTIONS

Switch

Collector

Emitter

Capacitor

1

Switch

2

Timing

3

45

GND

(Top View)

MARKING

DIAGRAMS

8

3x063

ALYWA

1

8

3x063AP1

YYWWG

1
8

33063AVP

YYWWG

1

Driver

8

Collector

7

Ipk Sense

6

V

CC

Comparator
Inverting
Input

G

AWL

AWL

© Semiconductor Components Industries, LLC, 2007

February, 2007 − Rev. 19

See detailed ordering and shipping information in the package

ORDERING INFORMATION

dimensions section on page 11 of this data sheet.

1 Publication Order Number:

MC34063A/D

MC34063A, MC33063A, NCV33063A

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage V
Comparator Input Voltage Range V
Switch Collector Voltage V
Switch Emitter Voltage (V

= 40 V) V

Pin 1

Switch Collector to Emitter Voltage V
Driver Collector Voltage V
Driver Collector Current (Note 1) I
Switch Current I

CC

IR
C(switch)
E(switch)

CE(switch)

C(driver)

C(driver)

SW

Power Dissipation and Thermal Characteristics

Plastic Package, P, P1 Suffix

TA = 25°C P
Thermal Resistance

D

R

q

JA

SOIC Package, D Suffix

TA = 25°C P

Thermal Resistance
Operating Junction Temperature T
Operating Ambient Temperature Range T

D

R

q

JA
J

A

MC34063A 0 to +70
MC33063AV, NCV33063A −40 to +125
MC33063A − 40 to +85

Storage Temperature Range T

stg

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.

40 Vdc

− 0.3 to +40 Vdc
40 Vdc
40 Vdc
40 Vdc
40 Vdc

100 mA

1.5 A

1.25 W
100 °C/W

625 mW
160 °C/W

+150 °C

°C

− 65 to +150 °C

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2

MC34063A, MC33063A, NCV33063A

ELECTRICAL CHARACTERISTICS (V

Characteristics

= 5.0 V, TA = T

CC

low

to T

[Note 4], unless otherwise specified.)

high

Symbol Min Typ Max Unit

OSCILLATOR

Frequency (V
Charge Current (VCC = 5.0 V to 40 V, TA = 25°C) I
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) I
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C) I
Current Limit Sense Voltage (I

= 0 V, CT = 1.0 nF, TA = 25°C) f

Pin 5

chg

= I

, TA = 25°C) V

dischg

osc

chg

dischg

dischg/Ichg

ipk(sense)

24 33 42 kHz
24 35 42

140 220 260

mA
mA

5.2 6.5 7.5 −

250 300 350 mV

OUTPUT SWITCH (Note 5)

Saturation Voltage, Darlington Connection

V

CE(sat)

− 1.0 1.3 V

(ISW = 1.0 A, Pins 1, 8 connected)

Saturation Voltage (Note 6)

(ISW = 1.0 A, R

= 82 W to VCC, Forced b ] 20)

Pin 8

DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C) h
Collector Off−State Current (VCE = 40 V) I

V

CE(sat)

C(off)

FE

− 0.45 0.7 V

50 75 − −

− 0.01 100

mA

COMPARATOR

Threshold Voltage

TA = 25°C
TA = T

low

to T

high

Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V)

MC33063A, MC34063A
MC33063AV, NCV33063A

Input Bias Current (Vin = 0 V) I

Reg

V

th

line

IB

1.225

1.21

−

−

1.25−1.275

1.29

1.4

1.4

5.0

6.0

− −20 −400 nA

V

mV

TOTAL DEVICE

Supply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC,

V

> Vth, Pin 2 = GND, remaining pins open)

Pin 5

4. T

= 0°C for MC34063A, −40°C for MC33063A, AV, NCV33063A

low

T

= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV, NCV33063A

high

5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

I

CC

− − 4.0 mA

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 b of output switch :

ICoutput

ICdriver – 7.0 mA*

w 10

*The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.

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3

MC34063A, MC33063A, NCV33063A

t

1000

μ

VCC = 5.0 V

500

Pin 7 = V

200

100

50

20

10

5.0

, OUTPUT SWITCH ON-OFF TIME ( s)

2.0

1.0

on−off

t

0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10

CC

Pin 5 = GND
TA = 25°C

CT, OSCILLATOR TIMING CAPACITOR (nF)

t

on

t

off

, OSCILLATOR VOLTAGE (V)

OSC

V

VCC = 5.0 V
Pin 7 = V

CC

Pin 2 = GND

200 mV/DIV

Pins 1, 5, 8 = Open
CT = 1.0 nF
TA = 25°C

10 ms/DIV

Figure 2. Output Switch On−Off Time versus

Oscillator Timing Capacitor

1.8

1.7

1.6

1.5

1.4

1.3

, SATURATION VOLTAGE (V)

1.2

1.1

CE(sat)

V

1.0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

IE, EMITTER CURRENT (A)

VCC = 5.0 V
Pins 1, 7, 8 = V
Pins 3, 5 = GND
TA = 25°C
(See Note 7)

Figure 4. Emitter Follower Configuration Output

Saturation Voltage versus Emitter Current

400

380

VCC = 5.0 V

360

I

= I

chg

340

320

300

280

260

, CURRENT LIMIT SENSE VOLTAGE (V)

240

220

200

IPK(sense)

−55 −25 0 25 50 75 100 125

V

dischg

TA, AMBIENT TEMPERATURE (°C)

Figure 3. Timing Capacitor Waveform

1.1

1.0

0.9

0.8

0.7

0.6
VCC = 5.0 V

Pin 7 = V

0.5

0.4

, SATURATION VOLTAGE (V)

CC

0.3

0.2

CE(sat)

0.1

V

0

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

CC

Pins 2, 3, 5 = GND
TA = 25°C
(See Note 7)

IC, COLLECTOR CURRENT(A)

Darlington Connection

Forced b = 20

Figure 5. Common Emitter Configuration Outpu

Switch Saturation Voltage versus

Collector Current

3.6

3.2

2.8

2.4

2.0

1.6

1.2

, SUPPLY CURRENT (mA)

0.8

CC

I

0.4

0

0 5.0 10 15 20 25 30 35 40

VCC, SUPPLY VOLTAGE (V)

CT = 1.0 nF
Pin 7 = V

CC

Pin 2 = GND

Figure 6. Current Limit Sense Voltage

versus Temperature

7. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

Figure 7. Standby Supply Current versus

Supply Voltage

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4

MC34063A, MC33063A, NCV33063A

170 mH

L

8

1

180

SQRQ2

Q1

V

12 V

7

I

R

sc

0.22

in

6

+

100

pk

V

CC

+

Comp.

−

OSC

C

T

1.25 V
Ref

Reg

5

2

3

C

4

1N5819

T

1500

pF

1.0 mH

R1 2.2 k

R2

47 k

+

330 C

V

28 V/175 mA

O

out

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

+

100

Optional Filter

V

out

Figure 8. Step−Up Converter

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5

MC34063A, MC33063A, NCV33063A

s

V

8

7

R

sc

V

in

6

1

2

out

8

7

R

sc

V

in

6

1

2

R

R ³ 0 for
constant V

in

Figure 9. External Current Boost Connections for IC Peak Greater than 1.5 A

9a. External NPN Switch 9b. External NPN Saturated Switch

(See Note 8)

8. If the output switch is driven into hard saturation (non−Darlington configuration) at low switch currents (≤ 300 mA) and high driver current
(≥ 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.

V

out

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6

MC34063A, MC33063A, NCV33063A

V

V

25 V

R

0.33

in

100

R1 1.2 k

8

SQ

Q2

R

7

I

sc

6

+

pk

V

CC

+

−

OSC

Comp.

C

T

1.25 V
Ref

Reg

5

R2

3.6 k

Q1

1

2

1N5819

3

C

T

470

pF

4

470 C

L

220 mH

V

out

5.0 V/500 mA

1.0 mH

+

O

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 W

1.1 A
Efficiency Vin = 25 V, IO = 500 mA 83.7%
Output Ripple With Optional Filter Vin = 25 V, IO = 500 mA 40 mVpp

+

100

Optional Filter

V

out

Figure 10. Step−Down Converter

8

1

8

7

R

sc

V

in

6

2

V

out

7

R

sc

V

in

6

1

2

Figure 11. External Current Boost Connections for IC Peak Greater than 1.5 A

11a. External NPN Switch 11b. External PNP Saturated Switch

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7

MC34063A, MC33063A, NCV33063A

4.5 V to 6.0 V

V

R

sc

0.24

in

100

R2 8.2 k

8

SQ

Q2

R

7

I

pk

6

V

CC

OSC

C

T

+

+

Comp.

−

1.25 V
Ref

Reg

5

R1

953

Q1

1

2

88 mH

L

3

+

1500
pF

1N5819

4

1.0 mH

V

out

−12 V/100 mA

1000 mf

C

O

+

Optional Filter

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 W

910 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

V

out

100

+

Figure 12. Voltage Inverting Converter

8

7

V

in

6

1

8

2

V

out

3

7

V

in

6

1

V

out

2

+

3

+

4

4

Figure 13. External Current Boost Connections for IC Peak Greater than 1.5 A

13a. External NPN Switch 13b. External PNP Saturated Switch

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8

MC34063A, MC33063A, NCV33063A

5.45′′

(Top view, copper foil as seen through the board from the component side)

2.500′′

MC34063A

MC34063A

(Top View, Component Side) *Optional Filter.

Figure 14. Printed Circuit Board and Component Layout

(Circuits of Figures 8, 10, 12)

INDUCTOR DATA

Converter

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.

Inductance (mH)

Turns/Wire

MC34063A

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9

MC34063A, MC33063A, NCV33063A

x)

Calculation Step−Up Step−Down Voltage−Inverting

ton/t

off

(ton + t

V

sat

VF = Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

Vin − Nominal input voltage.
V

out

I

out

f

min

V

ripple(pp)

NOTE: For further information refer to Application Note AN920A/D and AN954/D.

)

off

t

off

t

on

C

T

I

pk(switch)

R

sc

L

(min)

C

O

= Saturation voltage of the output switch.

− Desired output voltage,

− Desired output current.

− Minimum desired output switching frequency at the selected values of Vin and IO.

− 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.

(V

ǒ

V

out

V

2I

out(max)

in(min)

I

pk(switch)

) VF* V

* V

in(min)

1

f

ton) t

t

on

) 1

t

off

(ton + t

) − t

off

4.0 x 10−5 t
t

ǒ

t

0.3/I

pk(switch)

* V

I

t

out

9

V

ripple(pp)

|V

| + 1.25ǒ1 )

out

on
off

sat

on

off

on

in(min)
sat

off

) 1

)

t

Ǔ

Ǔ

on(max)

R2
R1

Ǔ

ǒ

(V

in(min)

V

in(min)

(ton + t

* V

I

pk(switch)

I

pk(switch)

V

) V

out

* V

sat

1
f

ton) t

t

on

) 1

t

off

) − t

off

4.0 x 10−5 t

2I

out(max)

0.3/I

pk(switch)

* V

sat

(ton) t

8V

ripple(pp)

off

off

on

F

* V

out

)

off

Ǔ

out

t

on(ma

)

ǒ

2I

(V

in(min)

|V

out

Vin* V

ton) t

t

on

t

off

(ton + t

4.0 x 10−5 t

out(max)

0.3/I
* V

I

pk(switch)

9

V

| ) V

sat

1

f

off

) 1

) − t

off

t

on

ǒ

t

off

pk(switch)

)

sat

I

t

on

out

ripple(pp)

on

Ǔ

F

off

) 1

t

on(max)

Ǔ

Figure 15. Design Formula Table

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10

MC34063A, MC33063A, NCV33063A

ORDERING INFORMATION

Device Package Shipping

MC33063AD SOIC−8 98 Units / Rail
MC33063ADG SOIC−8

MC33063ADR2 SOIC−8 2500 Units / Tape & Reel
MC33063ADR2G SOIC−8

MC33063AP1 PDIP−8 50 Units / Rail
MC33063AP1G PDIP−8

MC33063AVD SOIC−8 98 Units / Rail
MC33063AVDG SOIC−8

MC33063AVDR2 SOIC−8
MC33063AVDR2G SOIC−8

NCV33063AVDR2* SOIC−8
NCV33063AVDR2G* SOIC−8

MC33063AVP PDIP−8 50 Units / Rail
MC33063AVPG PDIP−8

MC34063AD SOIC−8 98 Units / Rail
MC34063ADG SOIC−8

MC34063ADR2 SOIC−8 2500 Units / Tape & Reel
MC34063ADR2G SOIC−8

MC34063AP1 PDIP−8 50 Units / Rail
MC34063AP1G PDIP−8

†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: T

change control.

= −40°C, T

low

= +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and

high

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

(Pb−Free)

98 Units / Rail

2500 Units / Tape & Reel

50 Units / Rail

98 Units / Rail

2500 Units / Tape & Reel

50 Units / Rail

98 Units / Rail

2500 Units / Tape & Reel

50 Units / Rail

†

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11

MC34063A, MC33063A, NCV33063A

SOIC−8 NB

PACKAGE DIMENSIONS

D SUFFIX

CASE 751−07

ISSUE AG

−Y−

−Z−

−X−
A

58

B

1

S

0.25 (0.010)

4

M

M

Y

K

G

N

C

SEATING
PLANE

0.10 (0.004)

H

D

0.25 (0.010) Z

M

Y

SXS

X 45

_

M

J

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.

MILLIMETERS

DIMAMIN MAX MIN MAX

4.80 5.00 0.189 0.197

B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010

J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8

____

N 0.25 0.50 0.010 0.020

S 5.80 6.20 0.228 0.244

INCHES

SOLDERING FOOTPRINT*

1.52

0.060

7.0

0.275

0.6

0.024

4.0

0.155

1.270

0.050

SCALE 6:1

mm

ǒ

inches

Ǔ

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.

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12

PDIP−8

NOTE 2

−T−

SEATING
PLANE

H

MC34063A, MC33063A, NCV33063A

58

−B−

14

F

−A−

C

N

D

G

0.13 (0.005) B

PACKAGE DIMENSIONS

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.

DIM MIN MAX MIN MAX

A 9.40 10.16 0.370 0.400
B 6.10 6.60 0.240 0.260
C 3.94 4.45 0.155 0.175
D 0.38 0.51 0.015 0.020

L

J

K

M

M

A

T

M

M

F 1.02 1.78 0.040 0.070
G 2.54 BSC 0.100 BSC
H 0.76 1.27 0.030 0.050
J 0.20 0.30 0.008 0.012
K 2.92 3.43 0.115 0.135
L 7.62 BSC 0.300 BSC
M −−− 10 −−− 10
N 0.76 1.01 0.030 0.040

INCHESMILLIMETERS

__

SENSEFET is a trademark of Semiconductor Components Industries, LLC.

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
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
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MC34063A/D