Datasheet MC34063AMEL, MC34063AML1, MC34063AML2, MC34063AP1, MC34063AD Datasheet (Motorola)

 
 

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

Order this document by MC34063A/D




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

8

Drive

Collector

SQ
R

I

pk

C

T

Comparator

+
–

(Bottom View)

100

1.25 V

Reference

Regulator

I

pk

Sense

V

CC

Comparator

Inverting

Input

This device contains 51 active transistors.

7

Oscillator

6

MOTOROLA ANALOG IC DEVICE DATA

Q2

Q1

1

Switch
Collector

2

Switch
Emitter

3

Timing
Capacitor

45

Gnd

PIN CONNECTIONS

Switch

Collector

Switch

Emitter

Timing

Capacitor

Gnd

1

2

3

45

(Top View)

Driver

8

Collector

7

Ipk Sense

6

V

CC

Comparator
Inverting
Input

ORDERING INFORMATION

Operating

Device

MC33063AD
MC33063AP1
MC33063AVD
MC33063AVP Plastic DIP
MC34063AD SO–8

MC34063AP1

 Motorola, Inc. 1996 Rev 5

Temperature Range

TA = – 40° to +85°C

TA = –40° to +125°C

TA = 0° to +70°C

Package

SO–8

Plastic DIP

SO–8

Plastic DIP

1

MC34063A MC33063A

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
Power Dissipation and Thermal Characteristics

Plastic Package, P, P1 Suffix

TA = 25°C P
Thermal Resistance R

SOIC Package, D Suffix

TA = 25°C P
Thermal Resistance R

Operating Junction Temperature T
Operating Ambient Temperature Range T

MC34063A 0 to +70
MC33063AV –40 to +125
MC33063A –40 to +85

Storage Temperature Range T

NOTES: 1. Maximum package power dissipation limits must be observed.

2.ESD data available upon request.

CC

IR
C(switch)
E(switch)

CE(switch)

C(driver)

C(driver)

SW

D

θJA

D

θJA

J

A

stg

–0.3 to +40 Vdc

–65 to +150 °C

40 Vdc

40 Vdc
40 Vdc
40 Vdc
40 Vdc

100 mA

1.5 A

1.25 W
100 °C/W

625 W
160 °C/W

+150 °C

°C

ELECTRICAL CHARACTERISTICS (V

= 5.0 V, TA = T

CC

low

to T

[Note 3], unless otherwise specified.)

high

Characteristics 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 µA

140 220 260 µA

5.2 6.5 7.5 –

250 300 350 mV

OUTPUT SWITCH (Note 4)

Saturation Voltage, Darlington Connection (Note 5)

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

Saturation Voltage, Darlington Connection

(ISW = 1.0 A, R

= 82 Ω to VCC, Forced β ] 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

NOTES: 3. T

= 0°C for MC34063A, –40°C for MC33063A, AV T

low

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:

Forcedbof output switch :

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

ICoutput

ICdriver – 7.0 mA *

w

10

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

high

V

CE(sat)

V

CE(sat)

FE

C(off)

– 1.0 1.3 V

– 0.45 0.7 V

50 75 – –

– 0.01 100 µA

2

MOTOROLA ANALOG IC DEVICE DATA

MC34063A MC33063A

ELECTRICAL CHARACTERISTICS (continued) (V

= 5.0 V, TA = T

CC

low

to T

[Note 3], unless otherwise specified.)

high

Characteristics UnitMaxTypMinSymbol

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
MC33363A V

Input Bias Current (Vin = 0 V) I

Reg

V

th

1.225

1.25–1.275

1.21

line

IB

–
–

1.4

1.4

– –20 –400 nA

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

NOTES: 3. T

= 0°C for MC34063A, –40°C for MC33063A, AV T

low

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:

Forcedbof output switch :

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

ICoutput

ICdriver – 7.0 mA *

w

10

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

high

I

CC

– – 4.0 mA

V

1.29
mV

5.0

6.0

Figure 1. Output Switch On–Off Time versus

Oscillator Timing Capacitor

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

on–off

1.0

t

0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10

CC

Pin 5 = Gnd

°

C

TA = 25

CT, OSCILLAT OR TIMING CAPACITOR (nF)

t

on

t

off

, OSCILLAT OR VOLTAGE (V)

VCC = 5.0 V

OSC

Pin 7 = V

V

Pin 2 = Gnd

Figure 2. Timing Capacitor Waveform

Pins 1, 5, 8 = Open

CC

CT = 1.0 nF

°

C

TA = 25

10 µs/DIV

200 mV/DIV

MOTOROLA ANALOG IC DEVICE DATA

3

Figure 3. Emitter Follower Configuration Output

Saturation V oltage versus Emitter Current

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
(See Note 4)

MC34063A MC33063A

Figure 4. Common Emitter Configuration Output

1.1

1.0

0.9

0.8

0.7

0.6

VCC = 5.0 V
Pin 7 = V

0.5
Pins 2, 3, 5 = Gnd

0.4

CC

°

C

, SATURATION VOLTAGE (V)

V

TA = 25

0.3

(See Note 4)

0.2

CE(sat)

0.1

0

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Switch Saturation Voltage versus

Collector Current

Darlington Connection

CC

°

C

IC, COLLECTOR CURRENT(A)

Forced

β

= 20

Figure 5. Current Limit Sense V oltage

versus T emperature

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

NOTE: 4.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

dischg

TA, AMBIENT TEMPERATURE (°C)

, SUPPLY CURRENT (mA)

CC

I

Figure 6. Standby Supply Current versus

Supply V oltage

3.6

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4

0

0 5.0 10 15 20 25 30 35 40

VCC, SUPPLY VOLTAGE (V)

CT = 1.0 nF
Pin 7 = V
Pin 2 = Gnd

CC

4

MOTOROLA ANALOG IC DEVICE DATA

MC34063A MC33063A

Figure 7. Step–Up Converter

170 µH

L

8

180

SQRQ2

7

I

R

sc

0.22

V

in

12 V

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

6

+

100

5

R1 2.2 k

Test Conditions Results

pk

V

CC

+

Comp.

–

R2

47 k

Osc

C

T

1.25 V
Ref

Reg

Q1

1

2

3
C

T

1500

pF

4

330 C

1N5819

28 V/175 mA

+

O

V

out

µ

H

1.0

+

Optional Filter

100

V

out

Figure 8. External Current Boost Connections for IC Peak Greater than 1.5 A

8a. External NPN Switch 8b. External NPN Saturated Switch

(See Note 5)

V

8

7

R

sc

V

in

NOTE: 5.If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents

6

(≥ 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.

1

2

out

8

7

R

sc

V

in

6

1

2

R

R
constant V

MOTOROLA ANALOG IC DEVICE DATA

³

0 for

V

out

in

5

MC34063A MC33063A

Figure 9. Step–Down Converter

Q1

1

2

1N5819

3
C

T

470

pF

4

470 C

L

220

µ

H

1.0

+

O

V

out

5.0 V/500 mA

8

SQ
R

7

I

R

sc

0.33

V

in

25 V

100

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 Ω 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

6

+

5

R1 1.2 k

pk

Osc

V

CC

+

Comp.

–

R2

3.6 k

Test Conditions Results

Q2

C

T

1.25 V
Ref

Reg

µ

H

+

100

Optional Filter

V

out

Figure 10. External Current Boost Connections for IC Peak Greater than 1.5 A

10a. External NPN Switch 10b. External PNP Saturated Switch

8

7

R

sc

V

in

6

6

1

2

V

out

8

7

R

sc

V

in

6

MOTOROLA ANALOG IC DEVICE DATA

1

2

V

out

MC34063A MC33063A

Figure 11. Voltage Inverting Converter

0.24

V

4.5 V to 6.0 V

in

100

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 Ω 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

R

sc

+

R2 8.2 k

Q1

1

2

88 µH

L

3

+

1500
pF

4

1000

1N5819

V

out

–12 V/100 mA

µ

f

C

O

+

8

SQRQ2

7

I

pk

6

V

CC

+
–

5

953

Test Conditions Results

Osc

Comp.

R1

C

T

1.25 V
Ref

Reg

1.0

µ

H

+

Optional Filter

100

V

out

Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A

12a. External NPN Switch 12b. External PNP Saturated Switch

8

7

V

in

6

1

2

MOTOROLA ANALOG IC DEVICE DATA

1

8

V

out

7

V

in

6

2

V

out

7

MC34063A MC33063A

Figure 13. Printed Circuit Board and Component Layout

(Circuits of Figures 7, 9, 11)

5.45

′′

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

2.500

′′

MC34063A

MC34063A

(Top View , Component Side)

INDUCTOR DATA

Converter Inductance (µH) 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

*Optional Filter.

8

MOTOROLA ANALOG IC DEVICE DATA

MC34063A MC33063A

Figure 14. Design Formula T able

Calculation Step–Up Step–Down Voltage–Inverting

ton/t

off

(ton + t

I

pk(switch)

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)

V

ripple(pp)

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

)

off

t

off

t

on

C

T

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.

ǒ

V

2I

(V

out

in(min)

)

VF*

V

in(min)

ton)

t

on

t

off

(ton + t

4.0 x 10–5 t

out(max)

0.3/I

*

I

pk(switch)

9

V

|V

|+1.25

out

V

*

V

1

f

t

off

)

1

) – t

off

on

t

on

ǒ

t

off

pk(switch)

V

)

sat

I

t

on

out

ripple(pp)

in(min)
sat

off

)

t

Ǔ

on(max)

ǒ

1

)

|V

V

)

V

in(min)

ton)

t
t

(ton + t

4.0 x 10–5 t

2I

0.3/I

*

V

I

pk(switch)

I

pk(switch)

8V

out

on
off

sat

V

Ǔ

1

(V

in(min)

ǒ

R2

Ǔ

R1

*

V

sat

1

f

t

off

)

1

) – t

off

out(max)

pk(switch)

*

V

(ton)

ripple(pp)

F

on

out

*

off

V

)

t

off

out

Ǔ

)

t

on(max)

ǒ

2I

(V

in(min)

out(max)

I

pk(switch)

|)V

out

Vin*

1

f

ton)

t

on

)

t

off

(ton + t

off

4.0 x 10–5 t

ǒ

0.3/I

pk(switch)

*

V

sat

I

out

9

V

ripple(pp)

V

t

off

) – t

t

on

t

off

t

on

sat

1

on

)

Ǔ

F

off

)

t

Ǔ

1

on(max)

MOTOROLA ANALOG IC DEVICE DATA

9

NOTE 2

–T–

SEATING

PLANE

58

14

F

–A–

D

H

G

0.13 (0.005)

MC34063A MC33063A

OUTLINE DIMENSIONS

–B–

C

N

K

M M M

T

P, P1 SUFFIX

PLASTIC PACKAGE

CASE 626–05

ISSUE K

L

AB

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.

MILLIMETERS INCHES

MIN MINMAX MAX

DIM

A
B
C
D
F
G

J

M

H
J
K
L
M
N

9.40

6.10

3.94

0.38

1.02

2.54 BSC

0.76

0.20

2.92

7.62 BSC

—

0.76

10.16

6.60

4.45

0.51

1.78

1.27

0.30

3.43
10

1.01

°

0.370

0.240

0.155

0.015

0.040

0.100 BSC

0.030

0.008

0.115

0.300 BSC
—

0.030

0.400

0.260

0.175

0.020

0.070

0.050

0.012

0.135
10

0.040

°

–T–

–A–

58

4X P

–B–

14

C

8X D

K

0.25 (0.010)MB

SEATING
PLANE

SS

A0.25 (0.010)MTB

D SUFFIX

PLASTIC PACKAGE

CASE 751–05

(SO–8)

ISSUE P

M

R

X 45

_

_

M

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.

DIM MIN MAX MIN MAX

F

J

A 4.80 5.00 0.189 0.196
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049

G 1.27 BSC 0.050 BSC

J 0.18 0.25 0.007 0.009
K 0.10 0.25 0.004 0.009

M 0 7 0 7

P 5.80 6.20 0.229 0.244
R 0.25 0.50 0.010 0.019

INCHESMILLIMETERS

____

10

MOTOROLA ANALOG IC DEVICE DATA

MC34063A MC33063A

NOTES

MOTOROLA ANALOG IC DEVICE DATA

11

MC34063A MC33063A

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. “T ypical” parameters which may be provided in Motorola
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12

◊

MOTOROLA ANALOG IC DEVICE DATA

MC34063A/D

*MC34063A/D*