Datasheet MC34063ACS, MC34063ACN Datasheet (ANALOG INTEGRATIONS CORPORATION)

MC34063A

!

FEATURES

"

3V to 30V Input Voltage Operation.

"

Internal 1.6A Peak Current Switch.

"

Internal ±1.8% Reference.

"

Low Quiescent Current at 1.6mA.

"

Frequency Operation from 100Hz to 100KHz.

"

Current Limiting.

!

APPLICATIONS

"

Saver for Cellular phones

"

DC-DC Converter Module

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-00

!

DESCRIPTION

The MC34063A by Analog Integrations
Corporation, an impr oved second source over the
industrial standard MC34063A, is a monolithic
control circuit containing the primary functions
required for DC/DC converters. The device
consists of an internal temperature compensated
reference, comparator, controlled duty cycle
oscillator with an active current limit circuit, driver
and high current output switch. This device is
specifically designed to be incorporated in step­down, step-up and voltage-inverting applications
with a minimum number of external components.
The ±1.8% internal reference and low quiescent
current of 1.6mA are am ong the improvements of
the device over the competition.

!

TYPICAL APPLICATION CIRCUIT

200µH

L

D1
1N5819

V

C1

8

DRI SC

*RS

IN

+

100µF

7

IPK

6

VCC

5

FB

MC34063A

SE

TC

GND

1

2

CT

8.6V SAVER
*:Io=0.3/RS

470pF

RA

5.6K

3

4

Saver Circuit for Cellular Phone

!

ORDERING INFORMATION

MC34063A XX

P ACKAG E TYPE
N: PLASTIC DIP
S: SMALL OUTLINE

TEMPERATURE
C: 0°C~+70°C

C

+

O

RB
33K

V

OUT

F

µ

220

ORDER NUMBER

MC34063ACN
(PLASTIC DIP)

MC34063ACS
(PLASTIC SO)

PIN CONFIGURATION

TOP VIEW

1

SC

2

SE

3

TC

4

GND

DRI

8
7

IPK

6

VCC

5

FB

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1

!

ABSOLUTE MAXIMUM RATINGS

MC34063A

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-00

Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage
Switch Collector to Emitter Voltage
Driver Collector Voltage
Switch Current
Power Dissipation and Thermal Characteristics

Ta= 25°C
Thermal Resistance

Ta= 25°C
Thermal Resistance

Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range

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DIP Package

SO Package

.................................…………….......................

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.....................……………....…...........................

-0.3V~30V

...............................………….............................

.................……….......................

.................……….......................

.................……...…...............................0°

100°C /W

625mW

160°C /W

C~70°C

- 65°C~150°C

30V

30V
30V
30V
30V

1.6A

1.0W

125°C

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F , 9 In d u st r y E . 9 t h R oa d , S ci e nc e - b as e d In d u s tr i a l P a r k , H s i nc h u , T a i w an , R .O . C . TEL: [phone] FAX:[phone]

2

MC34063A

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-00

!

ELECTRICAL CHARACTERISTICS

(VCC= 5V, Ta=25

PARAMETER

Oscillator

TEST CONDITIONS

Charging Current 5.0V≤VCC≤30V I

Discharge Current 5.0V≤VCC≤30V I

Voltage Swing PIN 3 V

Discharge to Charge Current

V

IPK(SENSE)

=VCC I

Ratio

Current Limit Sense Voltage I

Output Switch

Saturation Voltage, Darlington
Connection

CHG=IDISCHG

ISW=1.0A;
V

C(DRIVER)=VC(SWITCH)

, unless otherwise specified.)

C

°°°°

SYMBOL MIN. TYP. MAX. UNIT

CHG

DISCHG

OSC

DISCHG/

V

IPK(SENSE)

V

CE(SAT)

I

CHG

10 25 40 µA

100 150 200 µA

0.6 V

6.0

250 300 350 mV

1.0 1.3 V

Saturation Voltage ISW=1.0A; I

C(DRIVER)

=50mA

V

CE (SAT)

(Forced β≅20)

DC Current Gain ISW=1.0A; VCE=5.0V h

Collector Off-State Current VCE=30V I

Comparator

Threshold Voltage

0°C≤Ta≤70°C V

C(OFF)

Threshold Voltage

Threshold Voltage Line

3.0V≤VCC≤30V REG

Regulation

Input Bias Current VIN=0V I

Supply current

V

IPK(SENSE)

V

PIN 5>VFB

=VCC

5.0V≤VCC≤30V
C

=0.001µF, PIN 2=GND

T

Remaining pins open

0.4 0.7 V

FE

35 120

10 nA

FB

1.227

1.21

LINE

IB

I

CC

0.1 0.3 mV/V

0.4 1

1.6 3 mA

1.25 1.273

1.29

V
V

µ

A

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3

(

)

(

)

!

TYPICAL PERFORMANCE CHARACTERISTICS

MC34063A

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-00

Outpu t Switch ON-OFF Time vs. Oscilla tor

Timing Capacitor

S)

µ

Output Switch ON-OFF Time (

ON-OFF

t

1000

100

10

1

0.1

VCC=5V
V

=VCC

IPK

PIN

5=GND



ON TIME

OFF TIME

1

CT, Oscillato r Timing Capacitor (nF)

10 100

VFB, Threshold Voltage vs Temper ature

1.3

VCC = 5V,
C

= 1nF

1.28

1.26

1.24

, Threshold Voltage (V)

FB

1.22

V

1.2

T

PIN 2 = GND

10 20 30 40 50 60 70 80

0

Temperature

C

°

, Threshold Voltage (mV)

IPK

V

Standby Supply Current vs. Supply Voltage

2

1.6

CT=1nF
V

=VCC

1.2

0.8

, Supply Current (mA)

CC

I

0.4

0

05

10 15 20

IPK

PIN 2=GND

VCC, Supply Voltage (V)

IPK Threshold Voltag e vs Temper ature

350
340
330
320

310
300
290
280
270
260
250

VCC = 5V

= 1nF

C

T

PIN 5 = GND

0 10203040506070

Temperature

C

°

25 30

80

Emmiter-Follower Configuration Output Switch

Saturation Voltage vs Emmiter Current

1.8

VCC = 5V
PIN 1, 7, 8 = VCC

1.7

PIN 3, 5 = GND

1.6

1.5

Saturation Voltage (V)

1.4

CE(SATE)

1.3

V

1.2
0 0.5 1 1.5

IE, Emitter Current (A)

, Saturati on Voltage (V)

0.2

CE(SAT)

V

Common-Emitter Configur at ion Output Switch

Saturation Voltage vs Collector Current

1.4

VCC = 5V

VCC = 5.0V

PIN 7 = VCC

PIN 7 =VCC

1.2

PINS 2, 3, 5 = GND

PIN 2, 3, 5 = GND
Forced Beta = 20

1.0

0.8

0.6

0.4

0

00.5 1

IC, Collector Current (A)

Darlington Connection

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

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Forced Beta = 20

1.5

4

!

BLOCK DIAGRAM

MC34063A

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-00

PIN DESCRIPTIONS

!

PIN 1: SC - 1.6A switch collector
PIN 2: SE - Darlington switch emitter
PIN 3: TC - Oscillator timing capacitor
PIN 4: GND - Power GND

GND

SC

SE

TC

1

Q2

Q1

2

3

1.25V

Reference

Voltage

4

QRS

80

CT

IS

Oscillator

Comparator

+

-

8

DRI

7

IPK

6

VCC

5

FB

PIN 5: FB - Feedback comparator inverting input
PIN 6: VCC - Power supply input
PIN 7: IPK - Highside current sense input,

VCC - V

=300mV

IPK

PIN 8: DRI - Drive collector

APPLICATION INFORMATION

!

•

DESIGN FORMULA TABLE

CALCULATION

ON

t

OFF

t

(tON + t

OFF) MAX

C

T

I

C (SWITCH)

STEP-DOWN

V + V

IN(MIN) SAT OUT

V - V - V

4x10-5t

2I

RS 0.33/I

IN(MIN) SAT OUT

L(MIN)

Co

V - V -V



C(SWITCH)

I

C( SWITCH) ON OFF

I (t +t

8V

OUT F

1

MIN

F

ON

OUT(MAX)

C(SWITCH)

RIPPLE (P - P)

ON(MAX)

t

)

STEP-UP

OUT F IN(MIN)

V + V V

V - V

-

IN(MIN) SAT

VOLTAGE-INVERTING

1

MIN

F

4 x 10-5t

2I

OUT(MAX)

0.33/ I

IN(MIN) SAT

V - V



C(SWITCH)

I

V

ON

ON OFF

t+t

()

OFF

t

C (SWITCH)

ON(MAX)

t

OUT ON

I t

RIPPLE(P - P)

OUT F

V + V

IN SAT

V - V

1

MIN

F

4 x 10-5t

2I

OUT(MAX)

0.33/ I

IN(MIN) SAT

V - V



C(SWITCH)

I

V

ON

ON OFF

t+t

()

OFF

t

C (SWITCH)

ON(MAX)

t

OUT ON

I t

RIPPLE(P - P)

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4F , 9 In d u st r y E . 9 t h R oa d , S ci e nc e - b as e d In d u s tr i a l P a r k , H s i nc h u , T a i w an , R .O . C . TEL: [phone] FAX:[phone]

5

MC34063A

V

=Saturation voltage of the output switch.

SAT

V

=Forward voltage drop of the ringback rectifier

F

The following power supply characteristics must be
chosen:

IN

OUT

-

Nominal input voltage.

-

Desired output voltage,

OUT

V

=1.25 (1 + RB/RA)

-

Desired output current.

V
V

I

OUT

APPLICATION EXAMPLES

!

8

DRI

RS

IN

C1

0.25

+

100µF

V

7

6

5

IPK

VCC

FB

MC34063A

CS

SE

TC

GND

1
2
3

4

F

MIN

V

RIPPLE (P-P)

470pF

CT

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-P2

-

Minimum desired output s witching frequency
at the selected values for V

-

Desired peak-to-peak output ripple voltage.

and I

IN

In practice, the calculated value will need to
be increased due to the capacitor equivalent
series resistance and board layout. The
ripple voltage should be k ept to a low value
since it will directly effect the line and load
regulation.

O

V

OUT

5V/500mA

200µH

L

D1
1N5821

RA

1.2K

+

3.6K

C
470µF

RB

OUT

.

Line Regulation VIN = 10V ~20V @ IO=500mA 40mV
Load Regulation VIN = 15V, @ IO=10mA ~ 500mA 5mV
Short Circuit Current

=15V, @ RL = 0.1

V

IN

Fig. 1 Step-Down Converter

Ω

1.3A

R1

R2

8

DRI

V

RS

IN

+

C1

RS RB

7

IPK

6

VCC

5

FB

MC34063A

CS

SE
TC

GND

1
2
3
4

CT

D1

Q1

L

Co

V

+

OUT

Fig. 2 Step-Down Converter with External PNP Saturation Switch

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

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6

MC34063A

!

APPLICATION EXAMPLES

RS

+

0.22

100µF

C1

RA

2.2K

V

IN



Line Regulation VIN = 8V ~16V @ IO=200mA 100mV
Load Regulation VIN = 12V, @ IO=80mA ~ 200mA 5mV

R1
150

(CONTINUED)

200µH

L

8

7

6

5

DRI
IPK

VCC

FB

MC34063A

RB

47K

CS

SE

TC

GND

1
2

3

4

CT

Fig. 3 Step-Up Converter

L

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-P2

D1

1N5819

680pF

C

O

220µF

D1

+

V

OUT

2V/200mA

V

R1

8

DRI

RS

V

IN

+

C1

RA

7

IPK

6

VCC

5

FB

MC34063A

RB

CS

SE

TC

GND

1

2

3

4

CT

R2

Q



+

C

O

OUT

Fig. 4 Step-Up Converter with External NPN Switch

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F , 9 In d u st r y E . 9 t h R oa d , S ci e nc e - b as e d In d u s tr i a l P a r k , H s i nc h u , T a i w an , R .O . C . TEL: [phone] FAX:[phone]

7

MC34063A

!

APPLICATION EXAMPLES

L
100µH

D1

V

OUT

-12V/100mA

1N5819

+

CT

680pF

C
470µF

(CONTINUED)

O

1

2

3

4

DRI
IPK

VCC

FB

MC34063A

RA
953

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-P2

8

CS

SE

TC

GND

7

6

5

S

RB

8.2K

RS

0.25

+

C1
100µF

V

IN

4.5V~6V

Line Regulation V

= 4.5V ~6V @ IO=100mA 20mV

IN

Load Regulation VIN = 5V, @ IO=10mA ~ 100mA 100mV

Fig.5 Inverting Converter

R2

8

DRI

7

RB

6

5

IPK

VCC

FB

MC34063A

RA

RS

V

IN

+

C1

CS

SE

TC

GND

1

2

3

4

R1

CT

Q1

L

CO

D1

V

OUT

+

Fig 6. Voltage Inverting Converter With PNP Saturated Switch

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F , 9 In d u st r y E . 9 t h R oa d , S ci e nc e - b as e d In d u s tr i a l P a r k , H s i nc h u , T a i w an , R .O . C . TEL: [phone] FAX:[phone]

8

MC34063A

!

PHYSICAL DIME NSIONS

8 LEAD PLASTIC SO (uni t: m m)

"

D

e

A

B

8 LEAD PLASTIC DIP (unit: mm)

"

DC/DC CONVERTER CONTROL CIRCUIT

SPEC NO: DS34063A-P2

SYMBOL MIN MAX

A 1.35 1.75

H

E

C

A1

L

A1 0.10 0.25

B 0.33 0.51
C 0.19 0.25
D 4.80 5.00
E 3.80 4.00

e 1.27(TYP)

H 5.80 6.20

L 0.40 1.27

D

SYMBOL MIN MAX

A1 0.381 —

E1

A2 2.92 4.96

b 0.35 0.56
C 0.20 0.36

E

A2

A1

L

b

e

C

eB

D 9.01 10.16
E 7.62 8.26

E1 6.09 7.12

e 2.54 (TYP)

eB — 10.92

L 2.92 3.81

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4F , 9 In d u st r y E . 9 t h R oa d , S ci e nc e - b as e d In d u s tr i a l P a r k , H s i nc h u , T a i w an , R .O . C . TEL: [phone] FAX:[phone]

9